Sequoiomyia taxodii

Dasineura ulmea

Neolasioptera asclepiae

Diaspidiotus liquidambaris

Callirhytis quercuscornigera (agamic)

Callirhytis quercuscornigera (sexgen)

Acraspis gemula (sexgen)

Acraspis prinoides (agamic)

Acraspis erinacei (sexgen)

Callirhytis quercusclavigera (agamic)

Dryocosmus quercuspalustris (sexgen)

Zopheroteras compressum (agamic)

Callirhytis quercusfutilis (agamic)

Callirhytis quercusfutilis (sexgen)

Callirhytis quercusoperator (agamic)

Callirhytis quercusoperator (sexgen)

Philonix fulvicollis (agamic)

Cynips quercusechinus (agamic)

Cynips quercusechinus (sexgen)

Neuroterus quercusbatatus (agamic)

Neuroterus quercusbatatus (sexgen)

Neuroterus quercusbatatus (agamic) (q-bicolor)

Neuroterus quercusbatatus (sexgen) (q-bicolor)

Neuroterus tectus (sexgen)

Callirhytis quercuspunctata (agamic)

Callirhytis quercuspunctata (sexgen)

Blaesodiplosis crataegifolia

Janetiella ulmii

Dasineura semenivora

Agrilus politus

Contarinia squamulicola

Phytoptus avellanae

Contarinia c-americana-enlarged-bud-gall

Acinacistyla coryli

Unknown c-americana-vein-sac

Contarinia q-palustris-vein-fold-gall

Macrodiplosis q-rubra-early-vein-swelling

Lasioptera quercirami

Asphondylia sambuci

Schizomyia umbellicola

Neolasioptera pierrei

Phyllocoptes wisconsinensis

Rhopalomyia grindeliae

Asteromyia grindeliae

Rabdophaga rigidae

Rabdophaga coloradensis

Rabdophaga latebrosa

Rabdophaga salicisgnaphalioides

Dasineura gemmae

Rabdophaga essigi

Euura orbitalis

Unknown salix-blasted-tip

Rabdophaga strobiloides

Rabdophaga persimilis

Rabdophaga salicisbrassicoides

Rabdophaga salicisrhodoides

Rabdophaga normaniana

Rabdophaga walshii

Rabdophaga racemi

Dasineura salicifolia

Rabdophaga plicta

Eriophyes semen

Aculops aenigma

Aculops tetanothrix

Iteomyia salicifolia

Euura salicisdesmodioides

Euura californica

Euura gracilis

Euura parva

Iteomyia salicisverruca

Euura cosensii

Euura serissimae

Euura lucidae

Euura monile

Euura salicispisum

Euura salicispomum

Euura petiolaridis

Euura bruneri

Euura crassicornis

Euura resinicola

Euura pyriformis

Eriophyes salicicola

Rabdophaga salicistriticoides

Rabdophaga salicisnodulus

Rabdophaga salicis

Rabdophaga tumidosae

Rabdophaga globosa

Euura salicisovum

Cryptorhynchus lapathi

Euhexomyza salicis

Rabdophaga timberlakei

Rabdophaga americana

Rabdophaga caulicola

Rabdophaga perocculta

Rabdophaga latipennis

Dasineura corticis

Rabdophaga podagrae

Rabdophaga cornuta

Asphondylia salictaria

Lygocecis packardi

Dasyneura ulmea Felt ["Phytophaga ulmi" is listed causing the same symptom]

Hosts: Ulmus

Blasted buds, immature leaf clusters, or swollen seeds of slippery elm midge, spring. PI. 10 (3); Fig. 185. 

Fusiform stem gall, A. incarnata, summer. Fig. 285
Milkweed stem midge, Neolasioptera asclepiae Felt 

Cryptophyllaspis liquidambaris 

Acer rubrum [sic--likely a mistake?]

Pouch-like leaf swellings, diameter 1/12 inch, scale insect, summer

Plagiotrochus cornigerus O. S. 
Agamic form, cornigerus O. S.

Irregular, ovoid, horned woody twig and branch galls, dia. 1-3 cm.

Adults in April. 

On Q. rubra, Q. palustris, Q. imbricaria, Q. ilicifolia. 

Plagiotrochus cornigerus O. S. Bisexual form 

Ovoid, whitish leaf galls, 1.5 - 2.5 mm long, along midrib or major veins.

Adults in July.

On Q. rubra, Q. palustris, Q. imbricaria, Q. ilicifolia. 

[Ovoid,](https://babel.hathitrust.org/cgi/pt?id=wu.89041294323&view=1up&seq=162&skin=2021&q1=punctatus) whitish galls, along midrib or larger veins, 1/15 to 1/10 inch long, on Spanish oak, pin and scrub oaks, early summer, sexual generation, gall wasp

Acraspis gemula Bass.
var. gemula Bass.
Bi-sexual form, gemula Bass.

Gall, egg-shaped, in buds or surrounded by deformed bracts.

Adults, May.

On Q prinoides.

Cynips fulvicollis Fitch
Bi-sexual form, pallipes bass.

Gall, egg-shaped, inside buds or deformed or dwarfed leaf clusters.

Adults, April, May.

On Q alba, michauxii

Acraspis gemula Bass.
var. gemula bass.
Agamic form, prinoides Beutm.

Gall, globular, spined, monothalamous, on leaves.

Adults, Dec.

On Q prinoides

Acraspis pezomachoides O.S.
var. erinacei Beutm.
Bisexual form, bicolens Kins.

Gall, seed-like, egg-shaped, in buds.

Adults, May.

On Q alba.


Andricus clavigerus O.S.
Agamic form, clavigerus OS

Irregular, ovoid, horned, woody twig or branch galls, dia 1-3 cm.

Adults in May

On Q phellos

Andricus palustris OS
Bi-sexual form, palustris OS

Gall hollow, succulent, dia 3-12 mm, singly or in clusters on young buds, aments, petioles and leaf blades.

Adults, mid May to June 4. 

On Q coccinea, falcata, palustris, phellos, rubra, velutina, ilicifolia, imbricaria, marilandica

Andricus palustris OS
Agamic form, compressus Gill.

Gall small, globular, dia 2-3 mm, on under surface of leaf, pinkish, wax-like, solid.

Adults, April or early May.

On Q coccinea, falcata, palustris, phellos, rubra, velutina, ilicifolia, imbricaria, marilandica

Callirhytis futilis OS
Agamic form, radicola DT

Gall, larval cells in scurfy bark of roots.

Adults, April.

On Q alba, bicolor, prinoides, prinus [montana], stellata

Callirhytis futilis OS
Bi-sexual form, futilis OS

Gall, blister-like, subglobular swellings on the leaf blade.

Adults, June to July.

On Q alba, bicolor, prinoides, prinus [montana], stellata

Callirhytis operator OS
Agamic form, operatola Bass.

Gall, seed-like galls at base of nut, inside cup.

Adults, May.

On Q rubra, coccinea, nigra, and ilicifolia

Callirhytis operator OS
Bi-sexual form, operator Bass.

Gall, large woolly. 

On Q rubra, coccinea, nigra, and ilicifolia

Cynips fulvicollis Fitch [not certain this is a synonym]
Agamic form, fulvicollis Fitch

Gall, globular, smooth to pubescent, on leaves.

Adults Nov, Dec

On Q alba, michauxii

Cynips echinus OS
var douglasii Ashm.
Agamic form, douglasii Ashm

Gall, squash-shaped, 5-11 short projections, on leaves.

Adults, Nov

On Q lobata

Cynips echinus OS
var douglasii Ashm.
Bi-sexual form, lobata McCracken & Egbert

Gall, spherical, short, soft spines, on twigs.

Adults, April

On Q lobata

Neuroterus batatus Fitch
Agamic form, batatus Fitch

Gall, tuber-like, irregular, polythalamous stem swellings.

Adults, April, May

On Q alba

Neuroterus batatus var. prini Kins.
Agamic form, deprini Kins

Gall as described for agamic forms on Q prinus [montana]

Adults, April

Neuroterus batatus Fitch
Bi-sexual form, bisexualis Kins

Gall, moderate sized swellings of young stems and petioles.

Adults, June

On Q alba

Neuroterus batatus var prini Kins
Bi-sexual form, prini Kins

Gall similar to that of noxiosus form vernalis on Q prinus [montana]

Adults, June, July

Neuroterus noxiosus Bass
Agamic form, noxiosus Bass

Gall, irregular, elongate woody swellings of young stems and sometimes petioles

Adults, late March to early May

On Q prinus [montana], bicolor

Neuroterus noxiosus Bass
Bi-sexual form, vernalis Kins

Gall, nearly as above [irregular, elongate woody swellings of young stems and sometimes petioles]

Adults, June to July 

On Q prinus [montana], bicolor

Neuroterus tectus Bass
Agamic form, abundans Kins

Gall, most likely similar to bisexual generation, but on mid-vein of leaf.

Adults, April and May

Bi-sexual form tectus Bass

Gall, small swellings of the stems of flower clusters, of petioles or of young stems

Adults, June

On Q prinoides

Plagiotrochus punctatus Bass
Agamic form, punctatus Bass

Irregular, ovoid, woody twig and branch gall, dia 1-3 cm.

Adults in April.

On Q rubra

Plagiotrochus punctatus Bass
Bi-sexual form, 

Blister-like leaf galls, on or near veins, length 1-2 mm.

On Q rubra

[Blister-like,](https://babel.hathitrust.org/cgi/pt?id=wu.89041294323&view=1up&seq=162&skin=2021&q1=punctatus) narrowly oval galls on or near the veins, length 1/25 to 1/12 inch, on Spanish oak, early summer, sexual generation, gall wasp.

Trishormomyia crataegifolia
Thorn coxcomb gall

Host: Crataegus

Coxcomb leaf gall, green and red, length 0.5 inch, midge, summer

Janetiella ulmii Beutm ["Dasyneura ulmea" is listed causing the same symptom]

Hosts: Ulmus

Blasted buds, immature leaf clusters, or swollen seeds or slippery elm midge, spring. PI. 11 (6)

Dasyneura semenivora

Hosts: Viola sp. 

"Plum-like" deformed fruit, length 0.5 inch, summer and fall. 

Agrilus politus

Corylus
Globose constricted twig swelling, diameter 3/4 inch, beetle

Salix
Twig galls

Globose constricted twig swellings, diameter 3/4 inch, beetle, spring

Cecidomyia squamicula

Corylus
Deformed catkins, swollen basally, midge, spring

Eriophyes avellanae

Corylus
Aborted terminal or lateral buds, diameter 1/2 inch, mite, spring

Eriophyes sp.

Corylus
Buds, swollen, aborted before or slightly after opening, mite, spring

Cecidomyia sp.

Corylus
Slightly swollen aborted buds, length 1/6 inch, midge, spring. Fig 47

Lasiopteryx coryli

Corylus
Red-haired leaf fold, midge, summer

Eriophyes coryli

Corylus
Thickened midribs and veins, mite

Cecidomyia sp. [the plate Felt refers to seems to more closely resemble [this gall](https://www.gallformers.org/gall/1639)]

Fusiform, thin-walled, striate, pale green vein swelling, length 1/5 inch, diameter 1/8 inch, on red oak, gall midge.

Cecidomyia sp.

Subglobose or fusiform, pale green, yellow margined leaf fold, mostly on under surface, length 1/8 to 1/4 inch, diameter 1/8 inch, gall midge.

Lasioptera querctrami

Reared from apparently normal oak twigs, gall midge, summer  

Asphondylia sambuci

Sambucus

Bud gall, diameter 3/4 inch, summer

Youngomyia umbellicola

Sambucus

Swollen florets, summer

Neolasioptera sambuci

Sambucus

Irregular stem gall, length 1/10 to 1/7 inch, midge, summer

Eriophyes sp.

Sambucus

Marginal leaf roll, whitish or brownish velvet, mite, summer

Rhopalomyia grindeliae

Reared from flower heads, summer

Asteromyia grindeliae

Grindelia

Blister leaf gall, greenish or blackish, diameter 1/8 inch, summer

Phytophaga rigidae

Salix
Bud galls

Fusiform, beaked, length 1 inch, midge, winter, early spring

Rhabdophaga coloradensis

Salix
Bud galls

Narrowly oval, slightly beaked, length 1 inch, midge

Salix
Twig galls

Narrowly oval, slightly beaked, apical, length 1 inch, midge

Rhabdophaga latebrosa

Salix 
Bud galls

Occur in buds, midges

Rhabdophaga gnaphalioides

Salix
Bud galls

Occur in buds, midges

Rhabdophaga gemmae

Salix [Salix exigua listed as a placeholder]
Bud galls

Occur in buds, midges

Dasyneura gemmae

Salix
Bud galls

Occur in buds, midges

Rhabdophaga essigi

Salix
Bud galls

Occur in buds, midges

Euura gemma

Salix
Bud galls

Enlarged lateral bud, sawfly

Cecidomyia sp.

Salix [Salix exigua added as a placeholder]
Bud galls

Blasted willow tips, midge

Rhabdophaga strobiloides

Salix
Rosette galls, midge, early spring and summer

Pine cone-like gall, length 1 to 1.25 inches

Rhabdophaga persimilis

Salix [Salix exigua added as a placeholder]
Rosette galls, midge, early spring and summer

Pine cone-like gall, length 1 to 1.25 inches [indicates same figure as [Rabdophaga strobiloides](https://www.gallformers.org/gall/1634)]

Rhabdophaga brassicoides

Salix
Rosette galls, midge, early spring and summer

Open rosette gall. Willow cabbage gall

Rhabdophaga rhodoides

Salix
Rosette galls, midge, early spring and summer

Open rosette gall. Willow cabbage gall

Rhabdophaga normaniana

Salix [Salix exigua added as a placeholder]
Rosette galls, midge, early spring and summer

Small rosette gall in small willow
Cabbage gall

Phytophaga walshii

Salix [Salix exigua added as a placeholder]
Rosette galls, midge, early spring and summer

Spongy or clustered rosette gall

Rhabdophaga racemi

Salix
Rosette galls, midge, early spring and summer

Clustered rosette galls

Dasyneura salicifolia

Leaf rolls or folds, midges, spring

Pod-like swelling or curled leaves

Rhabdophaga plicta

Salix
Leaf rolls or folds, midges, spring

Closely rolled terminal leaves

Eriophyes semen

Salix
Capsule or pocket galls, plant mites, spring and summer

Irregularly hemispherical, greenish-yellow pocket galls on either surface of black willow leaf

Eriophyes aenigma

Salix
Capsule or pocket galls, plant mites, spring and summer

Filamentous leaf structure

?Eriophyes aenigma

Salix
Capsule or pocket galls, plant mites, spring and summer

A number of other capsule or pocket galls are produced by undescribed species of Eriophyes

Oligotrophus salicifolius 

Salix
Leaf galls

Ovoid, yellowish, red-spotted blister gall, diameter .1 to .125 inch, most evident on under surface, gall midge, summer

Pontania desmodioides

Salix 
Leaf galls

Flattish yellow-green, length .25 to .5 inch, sawfly, spring

Pontania californica

Salix
Leaf galls

Similar to [preceding](https://www.gallformers.org/gall/3538) ["Flattish yellow-green, length .25 to .5 inch"], only one gall on the leaf, sawfly, spring

Pontania gracilis

Salix
Leaf galls

Similar to [preceding](https://www.gallformers.org/gall/3538) ["Flattish yellow-green, length .25 to .5 inch"], more robust, nearly spherical, sawfly, spring

Pontania parva

Salix [Salix exigua listed as a placeholder]
Leaf galls

Similar to [preceding](https://www.gallformers.org/gall/3538) ["Flattish yellow-green, length .25 to .5 inch"], smaller, mostly on lower surface, sawfly, spring

Trishormomyia verruca

Salix
Leaf galls

Yellowish, red-spotted gall, diameter .1 inch, midge, summer

Euura cosensii

Salix [Salix exigua added as a placeholder]
Leaf galls

Conical petiole gall, length .25 to .33 inch, sawfly

Euura serissimae

Salix
Leaf galls

Conical, on petioles of branches producing pistillate catkins, on S. serissima, sawfly, spring

Pontania lucidae

Salix
Leaf galls

Petiole or midrib enlargement, spherical to ovoid, dimensions .25 to .5 inch, on S lucida, sawfly, spring

Pontania monile

Salix 
Leaf galls

Globular, smooth, fleshy, midrib gall, 2 to 6 in a row, diameter .25 inch, sawfly, spring

Pontania pisum

Salix
Leaf galls

Pea-like, pale yellowish gall, on underside of leaf, diameter .25 inch, sawfly, spring

Pontania pomum

Salix
Leaf galls

Rounded, yellowish-green, rosy cheeked gall, diameter .5 inch, sawfly, spring

Pontania petiolaridis

Salix 
Leaf galls

Very similar [to [Pontania pomum](https://www.gallformers.org/gall/3550): "Rounded, yellowish-green, rosy cheeked gall, diameter .5 inch, sawfly, spring"], on S petiolaris

Pontania bruneri

Salix
Leaf galls

Ovate, smooth, fleshy leaf gall, length .33 inch, on S. longifolia [exigua], sawfly, spring

Pontania crassicornis

Salix
Leaf galls

Spherical leaf gall extending from midrib almost to margin, average diameter .5 inch, on S humilis, sawfly, spring

Pontania resinicola

Salix
Leaf galls

Globose, commonly paired, red or pink, yellowish or green below, on S californica [eastwoodiae], sawfly, spring

Pontania pyriformis

Salix
Leaf galls

Pyriform, usually solitary, thin-walled, broadly attached, on S californica [eastwoodiae], sawfly, spring

Cecidobia salicicola

Salix
Leaf galls

Apparently pouch leaf galls, mite

Rhabdophaga triticoides

Salix
Twig galls

Irregular "wheat-ear" swelling .5 to 1.5 inches, midge, spring and summer

Rhabdopha nodula

Salix [Salix exigua added as a placeholder]
Twig galls

Nodula gall at base of twigs, length .33 inch, midge, spring and summer

Rhabdophaga salicis

Salix
Twig galls

Irregularly enlarged twigs of basket willow, midge, spring and summer

Phytophaga tumidosae

Salix [Salix exigua added as a placeholder]
Twig galls

Subglobose galls, the surface scarred, diameter 1/6 inch, midge, summer 

Rhabdophaga globosa

Salix [Salix eriocephala added as a placeholder]
Twig galls

Subglobular gall attached to twig, with dead area on one side, diameter 2/5 inch

Euura ovum

Salix
Twig galls

Irregularly elongate, ovate, reddish-brown, spongy twig gall, length 1/2 to 4/5 inch, spring, sawfly

Cryptorhynchus lapathi

Salix 
Twig galls

Irregular branch and trunk swellings, beetle, spring

Populus

Irregular branch and trunk swellings, mostly on smaller stems, beetle

Agromyza salicis

Salix
Twig galls

Irregularly oval, subcortical twig swellings, length 1/8 inch, fly, spring

Phytophaga timberlakei

Salix
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Phytophaga americana

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Phytophaga caulicola
Rhabdophaga caulicola [listed separately]

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Phytophaga perocculta

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Phytophaga latipennis

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Dasyneura corticis

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Rhabdophaga podagrae

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Rhabdophaga cornuta

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Asphondylia salictaria

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Sackenomyia packardi

Salix [Salix exigua added as a placeholder]
Twig galls

Slightly enlarged or slender twigs, midges. A somewhat long series has been reared. They can be identified only by rearing and studying the insects. 

Plant Galls and Gall Makers