May, 1920] Descriptions of Diptcra 279 



Female. Similar in color to the male, the abdomen less distinctly 

 marked. Interfrontalia velvety black. Wings yellowish at bases. 



Interfrontal cruciate bristles present; each orbit about one-third as 

 wide as interfrontalia, with three supraorbitals, the lower one directed 

 outward, and three or four infraorbitals. Fore tibia with an additional 

 anterodorsal bristle. 



Length, 3.5-4.5 mm. 



Type, allotype, and 15 paratypes, Savonoski, Naknek 

 Lake, Alaska, July, 1919. Named for Jas. S. Hine, 



Hylemyia fuscohalterata sp. n. 



Male. Black, subopaque, densely gray pruinose. Orbits and 

 and cheeks slightly silvery pruinescent. Thorax when seen from behind 

 with five black vittae. Abdomen with a broad black dorsocentral vitta 

 which connects with a narrow black fascia on anterior margin of each 

 tergite; hypopygium shining, gray pruinescent. Legs black. Wings 

 slightly brownish, noticeably so basally. Calyptrae white. Halteres 

 brownish, the knobs infuscated. 



Narrowest part of frons about as wide as anterior ocellus; orbits 

 haired to middle; parafacial nearly as wide at base of antenna as third 

 antennal segment and as wide there as height of cheek, the latter with 

 a series of fine bristles on lower margin; third antennal segment but little 

 longer than second; arista nearly bare, swollen on basal third. Thorax 

 with two or three pairs of fine presutural acrostichals and no inter- 

 spersed hairs; prealar less than half as long as the bristle behind it; 

 sternopleurals 1 : 2. Abdomen depressed at base, sides parallel; 

 hypopygium of moderate size. Figure 22; fifth stemite somewhat 

 similar to that of hinei. Fore tibia without bristles at middle and 

 apex on posterior side; mid femur with long fine bristles on postero- 

 ventral surface; mid tibia with one or two small postercdorsal bristles; 

 hind femur with long bristles on anteroventral and short setulose hairs 

 on posteroventral surface; hind tibia with very fine bristles which are 

 rather variable In number but average four on postercdorsal, two long 

 and three short on anterodorsal, and two on anteroventral surface, the 

 median part of posterior surface with some fine setulae; tarsi subequal 

 in length to tibiae. Costal thorn minute; outer crossvein straight. 



Female. Interfrontalia velvety black. Thorax not distinctly 

 vittate. Knobs of halteres obscurely yellow. 



Interfrontalia with a pair of cruciate bristles; lower supraorbital 

 directed forward. Mid tibia with one anterodorsal, one posterior 

 and two postercdorsal bristles. Tarsi shorter than tibiae. 



Length, 2.5 mm. 



Type, allotype, and two paratypes, Katmai, Alaska, June, 

 1917. 



