DIPTERA, 369 
not prominent: mouth and palpi black: feelers black, with a hoary cover- 
ing; third joint linear, obliquely truncated at the tip, nearly reaching the 
epistoma, full twice the length of the second ; sixth very slender, very 
minutely pubescent, about twice the length of the third: chest with three 
yellowish brown stripes : abdomen obconical, with a cinereous covering, a 
little longer and broader than the chest: legs tawny ; thighs black, with 
tawny tips ; posterior thighs tawny towards the base; feet black : wings 
almost colourless ; veins black, tawny towards the base; lower cross-vein 
very slightly oblique, almost straight: alule white: halteres yellow. 
Length of the body 14 line; of the wings 3 lines. 
United States. 
Ca@nosta areata, Fom. 
Nigra, cano-tomentosa; caput antice album; thorax fusco trivittatus ; 
pedes fulvi, femoribus anticis tarsisque nigris, femoribus posterioribus 
nigro cinetis ; ale sublimpide. 
Black, with a hoary covering : head with a white covering in front ; 
frontalia black, broad, linear, with a hoary lanceolate stripe ; facialia with- 
out bristles ; epistoma not prominent: eyes bare: mouth and palpi black: 
feelers black; third joint linear, obliquely truncated at the tip, reaching 
the epistoma, more than twice the length of the second; sixth slender, 
pubescent, bare at the tip, stout at the base, more than twice the length of 
the third: chest with three pale brown stripes: abdomen elliptical, longer 
and a little broader than the chest: legs tawny ; feet and fore-thighs black ; 
hinder thighs with a black band near the tip: wings almost colourless ; 
veins tawny, black towards the tips ; lower cross-vein straight, almost up- 
right : alule white: halteres yellow. Length of the body 14 line; of the 
wings 3 lines. 
United States. 
Canosia? inracra, Fem. 
* Flava; antenne basi fusce; thoracis discus niger ; abdomen fulvum, 
apice subcinereum ; pedes fulvi ; ale sublimpide. 
Yellow: crown black, with a hoary covering; frontalia pitchy, linear, 
including on the back part a short lanceolate-hoary stripe ; facialia without 
