266 NORTH AMERICAN ANTHOMYIID FLIES OF GENUS PHAONIA 



Eyes almost nude, separated at narrowest part of frons by not more than 

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

 for some distance centrally; parafacial almost linear; longest hairs on arista 

 longer than width of third antennal segment. Thorax with one long and two 

 short pairs of presutural acrostichal bristles; postsutural dorsocentrals four; 

 prealar long; hypopleura bare. Fore tibia unarmed at middle; fore tarsus 

 slender, basal segment with some long outstanding sensory hairs on posterc- 

 ventral margin; mid femur with some fine bristles on basal half of postero- 

 ventral surface; mid tibia with two or three posterior bristles; hind femur 

 with some bristles on apical half of anteroventral surface, the posteroventral 

 surface without bristles except at extreme base and apex; hind tibia with two 

 anteroventral and two anterodorsal bristles. 



Length, 8 mm.? 



Ti/pe.— Hummer's Island, Maryland, May 16, 1902, (R. P. 



Currie), [U. S. N. M.]. 

 Phaonia harti new species 



Male and female. — Black, shining, densely gray pruinescent. Head with 

 silvery white on orbits, lunule, and especially on parafacials; interfrontalia 

 velvety black except when seen from in front; antennae black; second segment 

 partly reddish yellow; palpi reddish yellowy sometimes infuscated apically. 

 Thorax consi)icuously quadrivittate. Abdomen with a black dorsocentral 

 vitta. Legs black, sometimes with only the knees conspicuously reddish 

 yellow, but the tibiae are always paler than the femora and are sometimes 

 obscurely reddish yellow. Wings clear, veins brown, paler basally, the 

 cross-veins not noticeably infuscated. Calyptrae white. Halteres yellow. 



Male. — Eyes with very short sparse hairs; narrowest part of frons usually 

 distinctly wdder than distance across posterior ocelli; interfrontalia complete; 

 orbits with rather strong bristles from base of antennae to a short distance 

 from anterior ocellus; profile as in figure 11; longest hairs on arista as long as 

 width of third antennal segment; palpi dilated, with short stubby black bristles 

 except basally. Thorax with two pairs of presutural acrostichal bristles; 

 prealar over half as long as the bristle behind it; postsutural dorsocentrals 

 four; hypopleura with a few hairs on middle below spiracle. Abdomen elon- 

 gate ovate, tapered apically; basal sternite bare, fifth with a broad shallow 

 rounded posterior emargination. Fore tibia without a median posterior 

 bristle; fore tarsus with the sensory hairs on posteroventral margin of basal 

 segment of moderate length; mid femur with some rather irregular and not 

 very long bristles on basal half of posteroventral surface; mid tibia with two 

 or three posterior bristles; hind femur with eight or nine bristles on apical 

 half of anteroventral surface, and four or five on basal half of posteroventral; 

 hind tibia with two or three anteroventral and anterodorsal bristles. Outer 

 cross-vein much bent in middle. 



Female. — Frons one-third of the head-width at vertex, widened anteriorly; 

 orbits narrow, the bristles strong, some hairs laterad of them anteriorly; inter- 

 frontalia bare. Fourth al)dominal tergite distinctly longer than third, the 

 ai)ical bristles weak. 



Length, 7 to 8 mm. 



