134 INSECUTOR INSCITI^ M^NSTRUUS 



Pleura blackish, propleura one bristle, mesopleura bare, no 

 hairs below the disk, pteropleura bare, sternopleura one long 

 and one shorter about half the size, rest bare except between 

 the coxae where there are two or three rows of bristles. 



Abdomen black brown, hypopygium yellow brown, both with 

 sparing black hairs. 



Legs pale red-yellow, fore femora much swollen, tibia of 

 fore and hind with preapical bristles weak, mid tibia with two 

 strong divergent ; legs with black hairs. Wings hyaline, costa 

 with a conspicuous bump its height over the tip of the auxiliary 

 vein ; spines few, short. Small cross-vein below the tip of the 

 auxiliary vein, vein one very long, ending above midway 

 between the two cross-veins. Large cross-vein joins vein five 

 at acute angle. 



Monotype male, taken 14th October, 1919, 3 miles up Sheep 

 Creek from the mouth of Coyote Creek, or at the bottom of 

 the Ram Creek Pass trail, when out hunting. There were 

 heavy frosts, and about this time it went to 15 degrees below 

 zero. Sheep Creek is nearest to Wasa, British Columbia, some 

 24 miles from Cranbrook, British Columbia. 



Postleria, new genus. 



Fronto-orbital bristles equal or nearly so. No prosternal 

 bristles. Arista usually short. Otherwise as Leria Loew. 



Genotype, the following species. 



Postleria fuscolinea, new species. 



Fronto-orbitals nearly equal, no prosternals, dorsocentral 

 bristles very variable, the first next the scutellum seem always 

 present, and medium sized, the next three being behind the 

 suture present or absent, when present, the first one larger. 

 The presutural one usually present, though small. 



Length about 5 mm. Head light brown, a broad dark 

 brown stripe from the antennae straight through to the occiput, 

 only thin pale margins next to eyes. Cheeks red-yellow, often 

 silvery. Antennss red-yellow infuscated, arista short black, 

 microscopically pubescent. A basal swelling slightly larger 

 than is usual. 



