[Rhopalomyia] bigeloviaestrobiloides. USA (New Mexico). Chrysothamnus graveolens [Ericameria nauseosa per POWO] (Asteraceae).
Cecidomyia bigeloviaestrobiloides (as bigeloviae-strobiloides) Townsend 1894: 176. USA: New Mexico, nr Gallo Spring; ST; G; lost.

Gall.—Length, 8 to 10 mm.; width 3 to 6 mm. Rather elongate, subcylindrical in general form, but little narrower on apical than on basal portion. Borne on side of twig, to which it is attached by a short and narrow stem. Rather compact, formed of many narrowed overlapping stipules, but these are apparently united and grown together, forming a compact body, only the terminal elongate portions of the outer stipules free and showing as curled tips on the outside of the gall. The stipules arranged like the cone of a pine tree, all extending nearly upward but slightly outward from the central longitudinal cell. Outside of gall covered with a thin white woolly pubescence, the gall greenish beneath this, and the rather long narrow more or less curled free terminal ends of stipules protruding though the wooliness, and growing more numerous toward tip of gall. The central cell is from 4 to 5 mm. long, 1 mm. wide, quite cylindrical, its walls a little hardened in texture. It does not extend to base of gall...several larvae appear to inhabit the single cell in each gall...

R. bigeloviaestrobiloides (Townsend). This is known only from the original description of the gall, which may be the same as that made by R. utahensis. Host: Chrysothamnus sp.