278 The Ohio Journal of Science [Vol. XX, No. 7, 



in front of anterior ocellus; orbits with fine bristles to above middle; 

 parafacial at base of antenna distinctly wider than third antennal 

 segment and as wide as height of cheek, not narrowed below; cheek 

 with a few long fine bristles along lower margin; arista nearly bare, 

 much swollen at base; third antennal segment narrow, not much longer 

 than second. Presutural acrostichals very fine and short, two-rowed; 

 prealar about half as long as the bristle behind it; stemopleurals 1:2. 

 Abdomen subcylindrical ; hypopygium of moderate size; processes of 

 fifth sternite very large, curved inward, their tips slightly broadened, 

 glossy, and almost bare. Fore tibia with a bristle at middle on posterior 

 side, apical posterior bristle weak; mid femur with sparse bristles to 

 beyond middle on posteroventral surface; mid tibia with one antero- 

 dorsal and one posterodorsal bristle, and an anterior and two posterior 

 setulae; hind femur with a series of sparse anteroventral bristles; hind 

 tibia with two anteroventral, two anterodorsal, and three posterodorsal 

 bristles, and one or two posterior setulse. Costal thorn very small; 

 veins 3 and 4 slightly divergent at apices; outer cross-vein nearly 

 straight. 



Length, 5 mm. 



Type, Valdez, Alaska, June 4, 1919. One male. 



Hylemyia hinei sp. n. 



Male. Black, subopaque, densely pale gray pruinescent. Thorax 

 with a pale brown dorsocentral vitta which extends proximad of suture, 

 and a broader, less distinct vitta on each side of it which does not 

 extend proximad of suture. Abdomen with a moderately broad black 

 dorsocentral vitta which is slightly interrupted at posterior margin of 

 each tergite and connected with a narrow black fascia at anterior 

 margin of each; hypopygium gray pruinescent. Legs black, gray 

 pruinescent. Wings clear. Calyptras white. Halteres yellow. 



Head larger than usual, almost hemispherical; eyes separated by 

 about width of anterior ocellus; orbits setulose to middle; parafacial 

 narrower than third antennal segment, narrowed below; cheek nearly 

 three times as high as widest part of parafacial, with long bristly hairs 

 on lower margin anteriorly and above margin posteriorly; arista bare, 

 swollen on basal fourth. Prealar not over half as long as the bristle 

 behind it; presutural acrostichals rather widely separated, one or two 

 pairs strong, a number of hairs between the strong pairs. Abdomen 

 depressed, short and broad, slightly narrowed apically; fifth sternite 

 with a pair of shining setulose proces.ses at apex in center which project 

 downward; hypopygium as in Fig. 26. Fore tarsus compressed, longer 

 than tibia, the latter with one or two posterior bristles; mid tibia with 

 two posterodorsal and two posterior bristles ; hind feinur with a series of 

 anteroventral bristles, and a series of weaker posteroventral bristles 

 which is more or less distinctly interrupted before apex; hind tibia 

 with three posterodorsal, four to seven anterodorsal, and two or three 

 anteroventral bristles, and some setulae on middle of posterior surface. 

 First posterior cell narrowed at apex. 



