Amphibolips quercusspongifica (sexgen)

Craneiobia tuba

Macrodiplosis qoruca

Callirhytis clavula

Eriophyes salicicola

Aculops aenigma

Rabdophaga salicisbrassicoides

Rabdophaga strobiloides

Euura salicisnodus

Euura salicispomum

Euura salicisdesmodioides

Amphibolips confluens form spongifica 

Leaf-gall, globular, suppressing part or all of leaf, at first green, soon becoming light brown, with shiny, paper wall, containing a spongy mass of radiating fibres covered with down, which hold in place the oblong central larval chamber. 3-5 cm in diameter. Common at Huron. This insect shows an alternation of generations, hence the long list of synonyms.

Leaf gall on underside, tubular, with swollen base and cleft tip, not unlike a kettle-spout. Bright red and finely pubescent like underside of leaf. 1-2 x 5-S mm. Very rare.


Fig. 20. Quercus velutina affected by the gall-gnat Cecidomyia oruca Walsh (?) in company with an undetermined mite. Felt, Journ. Ec. Ent. IV:467. 

Leaf-gall, evident as a fold snug alongside veins on under surface. Pouches isolated at times, but usually confluent and present in great numbers. Brownish opening on upper surface, resembling swollen lips of a knife-cut. In southern Ohio I have seen every leaf on a good-sized tree dying from this gall, as early as June. (The figure shows what are doubtless galls of Cecidomyia foliora Russ. & Hook., evident as infoldings of the edge.) 

Andricus clavula

Cynips arbor 
Cynips clavula

Quercus alba

Twig-gall, being a club-shaped swelling of the extreme tip. 1.5 X 2-3 cm. Green, single-chambered, becoming woody and dark after emergence of insect in midsummer. Surface often corrugated and covered with cork spots. Cedar Point and Huron. Common.

Eriophyes salicicola

Phytoptus salicola

Host: Salix longifolia [interior]

Leaf-gall, tiny, globular to irregular, often massed, on either surface of leaf, at times projecting through. .25-3 mm. across. Light green to completely crimson. July. Common.

Eriophyes aenigma

Cecidomyia salicis-aenigma
Acarus salicis-aenigma

Host: Salix longifolia [interior]

Terminal bud-gall, made up of an irregular cluster of yarn-like masses, each about 1-2 mm. in diameter, the whole 2x3 cm. Whitish tomentose, turning brown and remaining in situ. July. Fairly common.


Rhabdophaga brassicoides

Cecidomyia salicis-brassicoides
Cecidomyia brassicoides

Host: Salix longifolia [interior]

Twig-gall, evident as telescoping of terminal twig-structures, with abnormal down-production, and great broadening of leaves, whole extending back 10 cm. or more. Frequent. 

Rhabdophaga strobiloides

Cecidomyia strobiloides
Cecidomyia salicis-strobiloides

Hosts: Salix longifolia [interior]

Terminal bud-gall, showing as a rounded conical mass of closely appressed scale-like leaves. Green, with a whitish silky covering. 2.5-3 x 4 cm. Usually abundant, but scarce this year.

probably Cryptocampus nodus

Euura salicis-nodus
Cryptocampus salicis-nodus

Host: Salix sp.

Twig-gall, being a spindle-shaped enlargement of the herbaceous or young woody twigs, concentric with the stem as a rule, about 1 cm. in diameter, and ranging up to 3.5 cm. in length. Color that of normal twig.



Pontania pomum

Nematus salicis-pomum
Nematus pomum

Hosts: Salix longifolia [interior]

Leaf-gall, spherical to spherical constricted, on lower surface, and projecting slightly through. 5-10 mm. diameter. Color ranging from light green to red, depending upon light relation. Minute cork-specks frequently present. Very common. July 1st.

Pontania desmidoides

Nematus salicis-desmidoides
Nematus inquilinus
Pontania inquilinus

Leaf-gall, flattened bean-shaped, bisected by leaf, usually centered on a lateral vein, one to several galls on a leaf. 5-8 mm. long, 4-5 mm. broad and thick. Color various, usually crimson. Abundant in a restricted area. July 23. 

Insect galls of Cedar Point and vicinity