278 NORTH AMEROCAN ANTHOMYIID FLIES OF GENUS PHAONIA 



Male. — Similar in color to the female, the dorsocentral vitta on abdomen 

 more distinct. 



Eyes very sparsely hairy, separated at narrowest part of frons by a distance 

 equal to width of third antennal segment; orbits contiguous above middle, to 

 which point they are setulose (fig. 13). Abdomen narrowly ovate, basal 

 sternite bare. Fore tibia without a posterior bristle; the anterodorsal setulae 

 small but distinct; fore tarsus slender, without long sensory hairs along the 

 posterior side of basal segment; postero ventral surface of hind femur with 

 short irregular setulose hairs. 



Allotype, and one male and one female; San Antonio Canyon, 

 Ontario, California, July 25, 1907, (J. S. Hine). One female, 

 Claremont, California, in mountains, (Baker), [U. S. N. M.]. 



Phaonia trivialis new species 



Male. — Black, shining. Head conspicuously grayish pruinescent, antennae 

 and palpi black. Thorax quadrivittate, with faint grayish pruinescence. 

 Abdomen densely gray pruinescent, with a poorly defined dorsocentral vitta, 

 which tapers from base to apex and nearly disappears before tip, the bases 

 of the bristles and hairs with a black dot surrounding each. Legs black. 

 Wings clear, infuscated at bases and with a faint infuscation on cross-veins. 

 Calyptrae and halteres yellow. 



Eyes hairy; frons rather broad, wider than distance across posterior ocelli; 

 orbits narrow, either about one-third as wide as interfrontalia, bristled on 

 entire length; parafacial at base of antennae not as wide as third antenna) 

 segment, narrowed below; face concave in middle; cheek not twice as high 

 as widest part of parafacial, with bristles on lower half; third antennal segment 

 about twice as long as second; longest hairs on arista distinctly shorter than 

 width of third antennal segment. Thorax with two or three pairs of irre- 

 gularly arranged presutural acrostichals, which are not conspicuously differ- 

 entiated from the long adjoining hairs; postsutural dorsocentrals three; 

 prealar bristle fine but long. Abdomen short ovate, basal sternite bare, fifth 

 with a broad shallow posterior emargination. Fore tibia without a median 

 posterior bristle; fore tarsus slender, longer than tibia, with a fine sensory 

 hair at base of basal segment and at apices of other segments on anterior and 

 posterior sides; mid femur with a series of weak posteroventral bristles which 

 are longest at middle; mid til)ia with one posterior bristle basad of middle; 

 hind femur with the anteroventral bristles almost absent l)asally, long on 

 apical half, the posteroventral svu-face with some short bristles on basal half; 

 hind tibia with two anterodorsal and four anteroventral bristles. Outer 

 cross- vein curved; veins three and four distinctly divergent ajiically. 



Length, 5 mm. 



Type.- — Banff, All^erta, Canada, [Illinois State Natural History 

 Survey]. 



