THE CANADIAN ENTOMOLOGIST. 171 



backward, others more or less forward, inward, decussate ; two orbital, 

 bristles in ^ . Face somewhat receding, epistoma not prominent ; 

 facial depression about one-half width of face, shallow ; facial ridges bare 

 except a bristle or two next vibrissas, latter rather strong, decussate, 

 inserted at a very slight constriction of the ridges a little above oral 

 margin ; sides of face of moderate width, bare except for frontal bristles ; 

 cheeks hardly one-fourth eye-height, bare except row of bristles on lower 

 margin. Eyes thinly hairy. Antennae short, hardly two-thirds length of 

 face, second joint slightly elongate, third joint hardly as long as second, 

 rounded ; arista thickened on basal third, nearly bare, apparently two- 

 jointed, basal joint short. Proboscis short, about two-thirds height of 

 head, fleshy, part below geniculation hardly longer than that above, 

 labella developed ; palpi small, very slender, filiform, bristly. Thorax 

 about as wide as head ; scutellum with an apical decussate, and two 

 lateral pairs of macrochaetse. Abdomen narrower than thorax, ovo- 

 conical, first segment not shortened ; macrochaetse marginal and discal, 

 strong ; hypopygium concealed. Legs moderately long and stout, 

 bristly ; claws and pulvilli of $ quite elongate. Wings longer than 

 abdomen, with costal spine, third vein bristly at base ; apical cell closed 

 in border very little before tip of wing, fourth vein bent at angle without 

 stump or wrinkle, apical cross-vein a little concave ; hind cross-veia 

 sinuate, nearer to bend of fourth vein. Type M. chcetostila, n. sp. 



Mtiscopteryx chaetosida, n. sp., (^ . 



Eyes dark brown, blackish ; frontal vitta brownish, silvery ; sides of 

 front, face and cheeks silvery-white, the pregenal area extensive, brownish, 

 silvery ; antennae and arista blackish, first two antennal joints rufous ; 

 proboscis dark brownish, palpi pale tawny ; occiput silvery, gray -hairy 

 below. Thorax densely silvery-gray pollinose, with five rather indistinct 

 cinereous vittae, the middle one obsolete before suture, the outer ones 

 interrupted at suture ; scutellum, humeri and pleurae silvery. Abdomen 

 almost entirely silvery pollinose, the hind margins of segments darker, 

 slightly brassy in some lights ; first segment with a strong lateral macro- 

 chaeta, besides other bristles and a median marginal pair ; second with a 

 lateral pair, a median marginal, and a weaker median discal pair ; third 

 with a weak median discal pair, and a marginal row of very strong 

 macrochaetae ; anal segment with niore or less irregularly placed marginal 



