308 DIPTERA OF NORTH AMERICA. [PART II. 



covered in front with white clown, clothed beneath with white hairs ; 

 eyes red ; mouth tawny ; feelers black, about twice the length of 

 the head; palpi black; chest of the male bluish-green, sometimes 

 biack towards the tip, of the female bright green or coppery-green ; 

 sutures of the segments sometimes black ; breast and under side of 

 the abdomen covered with white down ; legs yellow, adorned with 

 rows of minute spines, clothed with a few white hairs, and beset 

 with a few black bristles ; four hinder hips green ; tips of feet 

 black ; hind feet black, first joint brownish ; wings slightly gray, 

 wing-ribs tawny ; veins black ; poisers yellow. Length of the 

 body 1£ line ; of the wings 2j lines. 



a. North America. Presented by the Entomological Club. 



b. Ohio. Presented by the Entomological Club. 



c. Massachusetts. From Prof. Sheppard's collection. 



d. Nova Scotia. From Lieut, Redman's collection. 



Page 651. Clirysotus incertus, n. s. 



Tiridis, antennis nigris, femoribus viridibus, tibiis fulvis, apice 

 tarsisque obscurioribus, alis limpidis. 



Allied to C. femoralis. Body green, beset with black hairs and 

 bristles ; eyes red ; mouth and feelers black ; hips and thighs 

 green ; shanks tawny ; feet and tips of shanks dark tawny ; wings 

 colorless; wing-ribs pitchy ; veins black ; poisers tawny. 



a. United States. Presented by the Entomological Club. 



Page 653. I»orphyrops pilosicornis, Baen.sto>-'s MSS. 



^Eneo-viridis, antennis nigris, pedibus fulvis, tarsis piceis, 

 femoribus posticis apice fusco maculatis, alis limpidis. 



Body brassy-green, beset with black bristles ; eyes dark-red ; 

 moufh dark tawny ; feelers black ; bristle downy, proceeding from 

 the base of the third joint and more than twice its length ; breast 

 and sides of the chest covered with a white bloom, which appears 

 also on the chest, but is there very slight ; legs tawny, clothed 

 with short black hair, beset with a few black bristles ; feet pitchy ; 

 a small brown mark on the tip of each hind thigh ; fore hips at 

 the base and the other hips green and covered with white bloom ; 

 wings colorless ; wing-ribs tawny ; veins black ; poisers yellow. 

 Length of the body \\ line ; of the wings 2^ lines. 



a. St. Martin's Falls, Albany .River, Hudson's Bay, Presented 

 by G. Barnston, Esq. 



