262 NORTH AMERICAN ANTHOMYIID FLIES OF GENUS PHAONIA 



Phaonia citreibasis Malloch 



Phaorda citreibasis Malloch, Ohio Jour. Science, xx, p. 268, 1920. 



This species is glossy black with slight grayish pruinescence 

 on thorax and abdomen, the thorax quadrivittate and the ab- 

 domen with a poorly defined dorsocentral vitta. Legs black. 

 Bases of wings, calyptrae, and halteres bright orange. 



Eyes sparsely hairy, separated by about the distance across 

 posterior ocelli; arista pubescent. Thorax with two pairs of 

 long fine presutural acrostichals and four pairs of postsutural 

 dorsocentrals; prealar very long. Fore tibia without a median 

 posterior bristle; hind tibia with two to four anteroventral and 

 two anterodorsal bristles. 



Length, 8 mm. 



Originally described from Alaska. 



Phaonia atrocitrea new species 



Female. — Shining black, almost glossj', with slight but distinct grayish 

 pruinescence on thorax and abdomen. Arista entirely black. Thorax quadri- 

 vittate. Abdomen with faint checkerings. Legs black. Wings yellowish at 

 bases, cross-veins narrowly infuscated. Calyptrae orange yellow. Halteres 

 with black knobs. 



Eyes with very short hairs; frons about one-third of the head-width; orbits 

 with strong bristles and lateral setulose hairs; parafacial at base of antennae 

 wider than third antennal segment, narrowed below; cheek a little higher than 

 widest part of parafacials, with a series of marginal bristles; third antennal 

 segment not twice as long as second; arista with short pubescence; palpi 

 slightly dilated. Thorax without strong presutural acrostichals; postsutural 

 dorsocentrals four; prealar long; hypopleura with some hairs in middle below 

 spiracle; sternopleurals one to two. Basal abdominal sternite bare. Fore 

 tibia with one or two median posterior bristles; fore tarsus slender, a little 

 longer than tibia, basal segment without long sensory hairs, not densely 

 haired; mid femur with an anteroventral and a posteroventral series of bristles 

 which are rather short; mid tibia with two or three posterior bristles; hind 

 femur with anteroventral series of long bristles and a i)Osteroventral series 

 which does not extend to apex; hind tibia with two anterodorsal and three 

 anteroventral bristles, the apical posterodorsal bristle minute, the others long. 



Length, 8 mm. 



Type. — Savonoski, Naknck Lake, Alaska, July, 1010, (J. 8. 

 Hine), [Ohio State LTniversity]. 



This species bears a very strong resemblance to citreibasis, but 

 in that species the arista is yellow at base, the wings are nuich 

 brighter yellow at bases, the halteres are orange yellow, and llie 

 hypopleura is bare. 



