Oligotrophus salicifolius

Cecidomyiidae

Iteomyia

Salix eriocephala

Alabama

Colorado

Connecticut

Delaware

Florida

Georgia

Illinois

Indiana

Iowa

Kansas

Kentucky

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Nebraska

New Hampshire

New Jersey

New York

North Dakota

Ohio

Pennsylvania

Rhode Island

South Dakota

Tennessee

Vermont

Virginia

West Virginia

Wisconsin

Manitoba

New Brunswick

Newfoundland and Labrador

Nova Scotia

Ontario

Prince Edward Island

Quebec

Saskatchewan

Salix humilis

Arkansas

District Of Columbia

Hawaii

Louisiana

North Carolina

Oklahoma

Puerto Rico

South Carolina

Texas

Saint Pierre and Miquelon

Salix sericea

Key to American Insect Galls

Iteomyia salicifolia

Oligotrophus salicifolius, n. sp.

Salix
Leaf galls

Yellowish, truncate, greenish yellow, lipped gall, diameter 2 mm.

Gall midges of Aster, Carya, Quercus and Salix

Oligotrophus salicifolius 

Galls on Salix humilis, July 12. Same gall on Salix, September 22.

The irregular, yellowish, red-spotted galls of this species on the leaves of Salix humilis were taken at Karner September 7, 1909, adults being reared in March and April of the following year. The deep orange larvae appear to desert the galls in late fall, spinning oval, yellowish cocoons attached to any hard substance such as a leaf. The gall is very similar to that of [O. capreae](https://bladmineerders.nl/parasites/animalia/arthropoda/insecta/diptera/nematocera/cecidomyiidae/cecidomyiinae/lasiopteridi/oligotrophini/iteomyia/iteomyia-capreae/) Winn. and the adults are evidently closely allied though separable in color characteristics. 

Gall. Length 2 to 3 mm, irregular, ovoid, monothalamous, yellowish, red-spotted and usually most evident on the under surface of the leaves of Salix humilis. 

68th report of the State Entomologist on injurious and other insects of the State of New York

Oligotrophus salicifolius

Yellow, red-spotted, flattened gall, diameter 2-3 mm.

Oligotrophus salicifolius 

Salix
Leaf galls

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

Plant Galls and Gall Makers

Iteomyia salicifolia

Host: Salix sp.

Salix
Leaf gall
Spherical gall protruding from only one side of leaf

[A drawing of this gall appears on page 282, Figure 414b]

Galls are monothalamous and about 2 mm in diameter. Full-grown larvae leave the galls in late summer and spin cocoons in which they overwinter.

Range: NY


The plant-feeding gall midges of North America

[Fritz et al report a higher prevalence of Iteomyia salicifolia on hybrids between Salix eriocephala and sericea than on either parent species]

Interspecific hybridization of plants and resistance to herbivores: hypotheses, genetics, and variable responses in a diverse herbivore community