800 LIST OF DIPTERA. 



vein forming an acute angle with the fourth longitudinal vein, 

 slightly curved inward near the base ; almost straight from thence 

 to the tip, joining the border at some distance above the tip of the 

 wing ; lower cross-vein with two slight curves, the lower short and 

 inward, the other long and outward ; scales grayish with tawny 

 borders. Length of the body 5 lines; of the wings 10 lines. 

 a. New Holland. Presented by the Earl of Derby. 



Duomyia, n. g. 



Body, linear, convex, narrow: head large, without bristles: 

 face very large, furrowed ; epistoma not prominent : sucker large : 

 feelers shorter than the face ; third joint long, compressed nearly 

 linear ; bristle not hairy, nearly twice the length of the third joint, 

 its first joint obsolete ; second very short : third slightly thickened 

 at the base, slender and tapering from thence to the tip : 4th longi- 

 tudinal vein not sending forth a tip cross-vein as in Tachina, but 

 more resembling that of Anthomyia, and proceeding in a nearly 

 straight line to the tip of the wing. 



Duomyia ohscura, n. s., fem. Cyanea, capite thoracisque lateribus 

 ferrugineis, abdomine purpureo, antennis nigris, pedibus ferru- 

 gineis, femoribus supra cyaneis, tibiis anticis tarsisque nigris, 

 alisfuscis. 



Head pitchy and furnished with a few short white hairs above, 

 yellow in front, ferruginous on the crown, whence a ferruginous stripe 

 extends to the feelers ; face pale yellow ; grooves for the feelers 

 white ; eyes red, not hairy ; sucker black, clothed with short tawny 

 hairs; palpi black, beset with black bristles: feelers black; third 

 joint flat above, very slightly convex beneath, rounded at the tip, 

 nearly six times the length of the second joint: chest dark blue, 

 shagreened, thinly covered with tawny down, ferruginous on each 

 side ; scutcheon smooth, shining, abdomen dark purple, very convex, 

 punctured, shining, narrower and a little longer than the chest: legs 

 ferruginous, stout, clothed with short hoary hairs ; thighs blue above ; 

 fore shanks and feet black ; foot-cushions tawny ; wings dark brown, 

 especially along the fore border ; wing-ribs tawny ; veins black, tawny 

 at the base; fourth longitudinal vein forming a very obtuse angle 

 at the junction of the lower cross-vein, joining the border a very 

 little above the tip of the wing; lower cross- vein forming a very 

 obtuse angle with the fourth longitudinal vein, straight for half the 

 length, slightly curved outward from thence to the tip ; scales 

 brownish. Length of the body 7 lines ; of the wings 14 lines. 

 a. New Holland. Presented by J. Hunter, Esq. 



