260 NORTH AMERICAN ANTHOMYIID FLIES OF GENUS PHAONIA 



of spiracle. Basal abdominal sternite bare, fifth with a very- 

 broad rounded posterior excision. Fore tibia with one or two 

 median posterior bristles ; fore tarsi slender, without long sensory 

 hairs along the posterior side of basal segment; mid tibia with 

 three or four posterior bristles; hind femur without exceptional 

 armature, hind tibia with a bristle near base on posterodorsal 

 surface, the apical posterodorsal bristle barely distinguishable. 



Length, 7.5 mm. 



I have seen this species only from New York. 



Phaonia frenata (Holmgren) 



Aricia frenata Holmgren, Ins. Nordgroenl., p. 103, 1872. 



I have seen this species only from Alaska. The summary of 

 the characters of the male given in the key to species should 

 enable students to recognize that sex. I have not seen the 

 female. 



Length, 6 mm. 



Originally described from Greenland. 



Phaonia alticola new species 



Female. — Black, shining, with distinct but not very dense bluish gray 

 pruinescence. Head entirely black. Thorax quadrivittate. Abdomen with 

 a poorly defined dorsocentral vitta and lateral checkerings black. Legs 

 black. Wings clear, cross-veins not infuscated. Calyptrae yellowish. 

 Halter es dark brown. 



Eyes with short hairs; frons about two-fifths of the head-width; orbits 

 strongly bristled, with two series of bristles on upper half and many lateral 

 setulose hairs below; parafacial at base of antennae wider than third antennal 

 segment, not narrowed below; cheek about twice as high as width of para- 

 facial, with a series of bristles on lower margin and some hairs above them; 

 antennae short, third segment not twice as long as second; arista with very 

 short pubescence; palpi slender. Thorax without strong presutural acro- 

 stichals; postsutural dorsocentrals three; prealar long; hypopleura bare; 

 sternopleurals 1 : 2. Basal abdominal sternite bare, genitalia normal. Fore 

 tibia with two posterior median bristles; fore tarsus slender, longer than tibia, 

 basal segment without long sensory hairs and not densely haired; mid femur 

 with cne or two bristles on basal half of anteroventral surface and five or six 

 on basal half of posteroventral; mid tibia with two anterodorsal and three 

 posterior bristles; hind femur with a series of long bristles on anteroventral 

 surface, and a few on basal half of posteroventral; hind tibia with tlirec or 

 four anteroventral and two anterodorsal bristles, the apical posterodorsal 

 bristle very small. Costal thorn long; last section of fourth vein about as 

 long as preceding section. 



Length, 9 mm 



