240 NORTH AMERICAN ANTHOMYIID FLIES OF GENUS PHAONIA 



5. Vibrissa! angle very much produced beyond a vertical line drawn from 



base of antennae (fig. 8); thorax with four pairs of postsutural dorso- 

 central bristles and one or two pairs of long presutural acrostichals. 



protuberans new species 



— Vibrissal angle produced but little beyond a vertical line drawn from base 



of antennae (fig. 9) 6 



6. At least the abdomen bluish black; margins of calyptrae much darker 



than their discs, dark brown or fuscous caerulescens Stein 



— Abdomen and thorax both black; margins of calyptrae yellowish 7 



7. Neither sex with a distinct median posterior bristle on fore tibia; base 



of wing conspicuously yellow; neither sex with anterodorsal bristles 

 on mid tibia serva Fallen 



— Female with one or two bristles on anterodorsal surface of both fore and 



mid tibiae; base of wing not conspicuously yellow. 



savonoskii new species 



8. Margins of calyptrae brownish or blackish, much darker than their discs; 



bluish black species; both notopleurals surrounded with fine hairs. 



caerulescens Stein 



— Margins of calyptrae yellowish 9 



9. Thorax with four pairs of postsutural dorsocentral bristles; only the 



posterior notopleural bristle surrounded with fine hairs. 



protuberans new species, female 



— Thorax with three pairs of postsutural dorsocentral bristles. 



versicolor Stein^ 



10. Hind tibia with a strong outstanding bristle near base on posterodorsal 



surface; fore t'x\)isL without short dense hairs on ventral surface. 



basiseta Malloch 



— Hind tibia with only the calcar on posterodorsal surface, which is situated 



about one-fourth from apex, or the fore tibia has short dense hairs on 

 ventral surface 11 



11. Fore tarsus without any long outstanding fine sensory hairs along the 



posterior or posteroventral margins of basal segment, even the one at 

 apex short and setulose when present, the entire surface with dense 

 short hairs which are sometimes curled at apices as if singed 12 



— Fore tarsus with several long fine outstanding sensory hairs along the 



posteroventral margin of basal segment, the length of which is usually 

 greater than the diameter of the segment, or the segment has the short 

 hairs rather sparse and subdecumbent and not curled at apices. . . .14 



12. Fore tibia without any strong bristles or long outstanding hairs on the 



posterior or posteroventral surfaces consobrina Zetterstedt 



— Fore tibia with one or more bristles or outstanding setulose hairs on 



posterior or posteroventral surfaces 12a 



12a. Mid tibia without any anterodorsal bristles; fore tibia with a very fine 

 long setulose hair on posteroventral surface; hind femur with some long 

 bristles on basal half of posteroventral surface, .incerta new species 



— Mid tibia with one or more anterodorsal liristlcs; fore tibia with one 



or two outstanding hairs or bristles 13 



^ 1 have not seen this species. 



