186 Journal New York Entomological Society. t^'°i- xxiv, 



oval, with a length about twice the width and rather thickly setose. Type 

 Cecid. 1618. 



Rhopalomyia grindeliae new species. 



This species was reared by Mr. P. H. Timberlake in October, 1915, 

 from apparently unmodified flower heads of tar weed, Grindelia ciinei- 

 folia, collected on a salt marsh near Millbrae, Cal. 



Gall. — The flower heads from which this species was reared presented no 

 external modifications. The larvae apparently inhabit individual florets, ren- 

 dering them hollow and infertile. 



Male. — Length 2.5 mm. Antennae extending to the third abdominal seg- 

 ment, sparsely haired, yellowish brown; 16 segments, the fifth with a stem 

 as long as the cylindric basal enlargement, the latter with a length about one- 

 half greater than its diameter ; terminal segment with the basal portion some- 

 what reduced, with the apical stem represented by a long, somewhat enlarged, 

 fusiform, setose appendage. Palpi probably biarticulate, the distal segment 

 long, somewhat expanded distally and with a length four times its diameter. 

 Mesonotum shining dark brown, the scutellum and postscutellum a little 

 lighter. Abdomen dark brown. Genitalia fuscous yellowish. Halteres yel- 

 lowish basally, fuscous apically. Coxae yellowish, legs pale straw ; claws long, 

 slender, evenly curved, the pulvilli as long as the claws. Genitalia ; basal clasp 

 segment short, broad ; terminal clasp segment rather short, swollen near the 

 middle; dorsal plate broad, broadly and triangularly emarginate ; ventral plate 

 broad, very broadly and roundly emarginate. Harpes stout, divergent, taper- 

 ing to irregular, strongly tuberculate appendages. 



Female. — Length 3.5 mm. Antennae extending to the base of the ab- 

 domen, sparsely haired, yellowish brown; 17 cylindrical, sessile segments, the 

 fifth with a length about twice its diameter ; terminal segment produced, 

 with a length three times its diameter, tapering to an obtuse apex. Palpi ; 

 the first segment short, subquadrate, the second with a length four times 

 its diameter and tapering slightly to a broadly rounded apex. Mesonotum 

 shining dark brown. Scutellum yellowish brown, postscutellum dark brown. 

 Abdomen dark red, the ovipositor and apical segments pale brown ; thorax and 

 abdomen sparsely clothed with long, black pubescence. Halteres and legs 

 yellowish brown. Ovipositor as long as the abdomen, the terminal lobes nar- 

 rowly lanceolate, with a length four times the width and sparsely setose. 

 Type Cecid. 1638. 



Rhopalomyia utahensis new species. 



A number of midges were reared by Mr. P. H. Timberlake in 

 May, 1913, from an ovoid bud gall on rabbit brush, Chrysothamnns 

 graveolens, collected in the vicinity of Murray, Utah. The gall, as 

 described by Mr. Timberlake, presents characters very similar to those 

 of Cecidomyia strobiloidcs Towns. (Psyche, 7: 176, 1894), and it is 



