J. R. MALLOCH 269 



widest part of parafacial, with three or four series of bristles on lower half; 

 palpi distinctly broadened apicallj', the bristles fine and of average length. 

 Thorax with two or three pairs of long presutural acrostichals which are set 

 very close together, forming almost a single irregular series; postsutural dorso- 

 centrals four; prealar long; hypopleura with some fine hairs below spiracle. 

 Abdomen with the basal sternite bare; fourth tergite distinctly longer than 

 third; apical paired genital processes with short stiff erect hairs. Fore tibia 

 without a median posterior bristle; fore tarsus longer than fore tibia, basal 

 segment without long sensory hairs on posterior side; mid femur with a series 

 of long bristles on basal two-thirds of posteroventral surface and some much 

 shorter bristles on basal half of anteroventral; mid tibia with two or three 

 posterior bristles; hind femur with a series of .stout bristles on anteroventral 

 surface and some long hair-like bristles on basal half of posteroventral surface; 

 hind tibia with two or three anterodorsal and three or four anteroventral 

 bristles, calcar long. Outer cross -vein curved. 

 Length, 7.5 mm. 



r(/pe.— Pullman, Washington, May 19, 1921, (A. L. IVIelander), 

 in collection of Dr. A. L. Melander. 



This specimen resembles striata Stein so closely that I at first 

 thought it might be the female of that species. But Stein has 

 described the female of striata as having the legs entirely yellow,, 

 and the frons with a pair of cruciate interfrontal bristles, neither 

 of which characters apply to the specimen before me. 



Phaonia brevispina new species 



Male and female. — Black, slightly shining, densely gray pruinescent. An- 

 tennae black, basal two segments brownish; palpi fuscous, usually paler at 

 bases. Thorax distinctly quadrivittate; scutellum blackish in center. Ab- 

 domen with a more or less distinct dorsocentral vitta and lateral checkerings 

 black. Legs black or dark brown, apices of femora and all of tibiae brownish 

 yellow. Wings clear; cross-veins distinctly infuscated. Calyptrae white. 

 Halteres yellow. 



Male. — Eyes almost bare, separated at narrowest part of frons by a distance 

 over twice as great as width across posterior ocelli; orbits with setulae to 

 anterior ocellus; cheek about one-third of the ej^e height; longest hairs on 

 arista at least as long as width cf third antennal segment; palpi but little 

 dilated. Thorax as in harti. Mid tibia with two posterior bristles; hind 

 femur with very short stout bristles on anteroventral surface, and in the 

 larger specimens with similar but vvcakcM- bristles on posteroventral surface; 

 hind tibia usually with two anterodorsal and two anteroventral Ijristles. 

 Outer cross-vein very slightly curved. 



Female. — Differs from a male in having the palpi noticeably dilated, frons 

 over one-third of the head-width and sometimes with a pair of weak inter- 

 frontal cruciate bristles. Fouth abdominal tergite not noticeably longer than 

 third. 



Length, 6.5 to 8 mm. 



TRANS. AM. ENT. SOC, XLVHI. 



