Cecidomyia salicis aenigma

Acarus aenigma

Salicis aenigma

Eriophyes aenigma

Eriophyidae

Aculops

Salix acutifolia

Alaska

Salix aegyptica

Salix alba

Alabama

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

Georgia

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minnesota

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New Mexico

New York

North Carolina

North Dakota

Ohio

Pennsylvania

Rhode Island

South Dakota

Tennessee

Texas

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming

Alberta

British Columbia

Manitoba

New Brunswick

Nova Scotia

Ontario

Prince Edward Island

Quebec

Saskatchewan

Salix amygdaloides

Oklahoma

Oregon

Utah

Salix appendiculata

Salix arbuscula

Salix aurita

Salix babylonica

Florida

South Carolina

Salix bebbiana

Newfoundland and Labrador

Northwest Territories

Nunavut

Yukon Territory

Salix brachycarpa

Salix caprea

Salix cinerea

Salix daphnoides

Salix discolor

Salix eleagnos

Salix exigua

Salix fragilis

Salix glauca

Salix gooddingii

Salix grandifolia

Salix groenlandica

Salix hastata

Salix herbacea

Salix hookeriana

Salix incana

Salix integra

Salix interior

Mississippi

Salix koreensis

Salix laevigata

Salix lanata

Salix lapponica

Salix lapponum

Salix livida

Salix matsudana

Salix melanopsis

Salix myrsinifolia

Salix myrsinites

Salix myrsinitis

Salix myrtilloides

Salix nigra

Salix nigricans

Salix orestera

Salix pentandra

Salix phylicifolia

Salix polaris

Salix purpurea

Salix pyrifolia

Salix reticulata

Salix retusa

Salix rosmarinifolia

Salix rotundifolia

Salix scouleriana

Salix starkeana

Salix triandra

Salix viminalis

Salix viridis

An illustrated catalogue of American insect galls

Insect galls of Cedar Point and vicinity

Insect galls of Springfield, Massachusetts, and vicinity

Aculops aenigma

S aenigma, n. sp.

On S nigra

A polythalamous, crumpled, irregularly spherical or ellipsoidal mass, something like the aborted mass of flower-buds of a common cauliflower, but with a more ragged and uneven surface, .30 — 1.10 inch in diameter, and growing almost sessile or sometimes on a stem as long as .50 inch, which is often branched and much flattened or distorted, from the side or occasionally from the tip of twigs .05 —.30 inch in diameter. When cut into early in the summer, there is seen to be no regular heart or symmetrical arrangement of the parts, as there is in all monothalamous galls, and the stem is crisp and rather fleshy than woody. This gall first appears early in June, being chiefly a deformation of the flower-catkins, but occasionally, unless I was deceived from confounding it with S. semen n. sp., which I think must have been the case, of the leaves. At that time, and for a month or two afterwards, it is of a pale green, but long before autumn it dries up and becomes brittle and of a dark ash-gray color, without, however, losing its original shape, and hangs on the trees till long after the next spring opens. It contains, so far as I could discover, no regular cells, but the larvae of the Gall-gnat appear to burrow irregularly in the main stem and its branches. On the same twig may often be seen 6 or 8 of these galls at irregular intervals of half an inch or U inches, and frequently two of them grow side by side and run together. "Whole trees are sometimes so covered by them, that the galls seem almost half as numerous as the leaves. As usual, the twigs, unless very large, are killed by the presence of these galls shortly after the galls have become mature. 

Described from 150 — 200 specimens. Very common and abundant everywhere in Rock Island County, Illinois. 

On the Insects, Coleopterous, Hymenopterous & Dipterous: Inhabiting the Galls of Certain Species of Willow. Pt 1st--Diptera

S aenigma

I have little doubt that this gall also is a deformation produced by an Acarus. From its great scarcity in 1866. 1 was unable to examine any green specimens, but on Aug. 27 I found among the crumpled exterior surface of a partly dried-up specimen a half-grown Acarus similar to those found in S. semen. It may be stated that on the tree from which this gall was procured there were no S. semen galls ; for this gall too, as well as S. aenigma, though so exorbitantly abundant in 1864 has been comparatively quite scarce in 1866. Usually in Acaridous galls the larvae live in a hollow inside; but in one on the leaf-stalk of the Black Walnut — Juglandis caulis Walsh MS — they reside among the brown external woolly pubescence, just as in S. aenigma they probably reside in the crumpled external surface of that gall. The Cecidomyidous larva) that I found in June and August in S. aenigma were most likely inquilines. (Proc. etc. III. pp. .608 — 9.) I have received through Mr. Bebb from Cr. W. Clinton, Esq., Buffalo, N. Y., pressed specimens of this gall growing on the same Willow — S. nigra — on which I find it exclusively. Hence there are at least 3 Willow-galls common to the Eastern and the Western States — S. strobiloides, S. siliqua, and S. aenigma.

On the Insects, Coleopterous, Hymenopterous & Dipterous: Inhabiting the Galls of Certain Species of Willow. Pt 2nd and last

Eriophyes aenigma

Cecidomyia salicis-aenigma
Acarus salicis-aenigma

Deformation of leaf of flower bud. Polythalamous, irregular mass both in size and shape, 1-3 cm long. Like a woolly tangle of aborted flower parts. Silvery to ash gray in color. Appears in early summer (June). On Willow, Salix.


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.


[Unnamed] Probably acarus.

Salix enigma. Willow mop gall. Mass. Oct. Aborted branch; twists to a dense, dark grey mop of dried leaves. Inner ones short and smooth, outer very hairy

Eriophyes aenigma

Filamentous structures on leaf

Eriophyes aenigma

A mass of small, filamentous structures on leaf or stem, sometimes on distorted buds, on S nigra

Eriophyes aenigma

A mass of filamentous structures on the stem

Key to American Insect Galls

Eriophyes aenigma

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

Filamentous leaf structure

Plant Galls and Gall Makers

Aculops aenigma

Salicis aenigma
Acarus? aenigma
Cecidomyia salicis aenigma

Hosts: Salix interior, nigra

Relationship: Galls; bud deformation of the flower catkins (Walsh 1864), and leaf buds or parts of leaves (Cook, 1904).

Range: IL, IN, MD, OH, PA

Amrine Catalog