Modified, aborted floret...Rhopalomyia gutierreziae (Cockerell)
Galls have a hard shell and are slightly longer and wider than normal florets. Adults were reared in October. Host: G. sarothrae.

[Rhopalomyia] gutierreziae. USA (New Mexico). Gutierrezia sarothrae (Asteraceae).
Asphondylia gutierreziae Cockerell 1901: 23. USA: New Mexico, Las Vegas; ST; ♂,P; USNM.

This species produces a pale green, fusiform or suboval swelling in the flower heads of Gutierrezia sarothrae. The gall is about 7 mm long, 3 mm broad and was taken at Las Vegas, N. M., adults appearing October 31st. An examination of the types in the United States National Museum shows that it probably belongs to this genus.

Gutierrezia sarothrae
Oval, flower bud gall, length 7 mm. Felt '15i, p. 274
Itonid. Gutierrezia bud midge, Rhopalomyia gutierreziae

Modified, aborted floret...Rhopalomyia gutierreziae (Cockerell)
Galls have a hard shell and are slightly longer and wider than normal florets. Adults were reared in October. Host: G. sarothrae.

Modified, aborted floret...Rhopalomyia gutierreziae (Cockerell)
Galls have a hard shell and are slightly longer and wider than normal florets. Adults were reared in October. Host: G. sarothrae.