Diplosis coloradella

Cecidomyiidae

Rhopalomyia

Artemisia campestris

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Artemisia spp

Zoology of Colorado

Rhopalomyia coloradella

Deformed flower head, about 10mm long and 5-6 mm wide, covered by enlarge bracts that are smooth and reddish to yellowish outwardly, covered in white hair on inner side.

Three new cecidomyiid flies

Deformed flower heads, length 10 mm, diameter 5-6 mm. On undetermined Artemisia.

Little known midge galls of certain composites

Cockerell (1904) described it as a deformed flower head, about 10 mm long by 5. 6 mm broad and covered by the greatly enlarged involucral bracts, which are outwardly smooth, reddish to yellowish, and inwardly covered with white trichomes. The host was given only as "Artemisia sp." Inasmuch as Rhopalomyia sp. appear to have narrow host preferences, future identification of R. coloradella should be difficult. 

Biology and taxonomy of the Rhopalomyia Gall Midges (Diptera: Cecidomyiidae) of Artemisia tridentata Nuttall (Compositae) in Idaho

Host plant is an undetermined species of Artemisia; Artemisia campestris is used as a placeholder.

Gallformers ID Notes