318 DIPTERA OF NORTH AMERICA. [PART II. 



Head bluish-green, clothed in front with white down ; fringed 

 on each ' side with white hairs ; eyes red ; feelers black ; chest 

 brassy green, bluish-green on each side ; breast covered with 

 hoary bloom ; abdomen brassy, green at the base, tinged with 

 green on each side, covered with white bloom beneath ; tip black ; 

 appendage f s tawny ; scales white, bordered with black ; legs 

 tawny ; tips of feet pitchy ; hind feet and tips of hind shanks 

 black ; wings colorless ; wing-ribs and poisers pale tawny ; veins 

 black. Length of the body 1^ line ; of the wings 3 lines. 



a. North America. Presented by the Entomological Club. 



Page 667. Dolichopus irrasus, s. n., Fern. 



Cyaneus, abdomine aeneo, antennis nigris, pedibus fulvis, tarsi? 

 piceis, alis cinereis fusco subvittatis. 



Body deep blue, beset with black hairs and bristles ; head 

 covered in front with a silvery bloom ; eyes red ; mouth and 

 feelers black ; -chest covered with ferruginous bloom ; sides and 

 chest covered with white bloom ; abdomen dark bronze, slightly 

 covered with white bloom, not longer than the chest ; legs tawny, 

 clothed with black hairs and bristles ; feet pitchy ; wings gray, 

 brownish along the borders of the veins ; wing-ribs and vein? 

 black ; fourth longitudinal vein slightly bent ; poisers dark tawny. 

 Length of the body 1 line ; of the wings 2 lines. 



a. Florida. Presented by E. Doubleday, Esq. 



Page 667. Ortliocfaile derempta, n. s. 



Yiridis, thoracis disco cupreo, abdomine purpureo, basi apiceque 

 cyaneo-viridi, lateribus aureo-viridibus, autennis nigris, pedibus 

 fulvis, femoribus viridibus, alis subcineris. 



Body green ; head and chest beset with black bristles ; eyes 

 and mouth black ; feelers black ; third joint very short, round ; 

 bristle proceeding from its tip ; disk of the chest copper-colored ; 

 abdomen purple, clothed with black hairs, bluish-green at the 

 base and at the tip, golden-green along each side ; legs tawny, 

 clothed with short black hairs ; hips and thighs green ; wings 

 slightly gray ; wing-ribs and poisers tawny ; veins pitchy. Length 

 of the body 1^ line ; of the wings 3 lines. 



a North America. Presented by the Entomological Club. 



