DIPTERA. 367 
cross-vein straight, almost upright, remote from the border: alulz colour- 
less with yellow borders: balteres luteous. Length of the body 1 line; 
of the wings 34 lines. : 
United States. 
Genus COZNOSIA, Meigen. 
Ca@nosta TARSALIS, Fem. 
Nigra, cano-tomentosa; thorax fusco trivittatus ; abdomen fusco vittatum ; 
pedes fulvi, tarsis nigris ; ale sublimpide. 
Black, with a hoary covering; frontalia deep black, broad, almost 
linear; facialia without bristles; epistoma hardly prominent: eyes bare: 
mouth and palpi black: feelers black, with a hoary covering ; third joint 
linear, slender, slightly truncated at the tip, almost reaching the epistoma, 
more than twice the length of the second; fifth distinct, longer than the 
fourth ; sixth minutely pubescent, stout towards the base, about twice the 
length of the third: chest with three indistinct pale brown stripes : abdo- 
men elliptical, a little longer than the chest, with a slender pale brown 
stripe; legs tawny; feet black: wings almost colourless; veins tawny, 
black towards the tips; lower cross-vein almost upright, with two very in- 
distinct curves, the lower outward, the upper inward: alule white with 
yellow borders: halteres yellow. Length of the body 23 lines; of the 
wings 5 lines. 
Cape. 
Canosa antica, Mas. 
Nigra, cano-tomentosa ; caput antice album ; antenne picee; thorax 
fusco trivittatus ; abdomen vitta dorsali maculisque quatuor fuscis ; 
pedes fulvi, femoribus anticis tarsisque nigris ; ale sublimpide. 
Black, with a hoary covering : head with a white covering in front ; 
crown with a cinereous triangular spot; frontalia deep black, slightly de- 
creasing in breadth towards the feelers ; facialia without bristles ; epistoma 
not prominent: eyes bare: feelers pitchy ; third joint linear, truncated at 
