No. 6.] CALLIPHORINAE OF THE UNITED STATES. 289 



indebted to Mr. V. von Roeder for a pair which has enabled 

 me to be certain of the identity oi the American specimens. 



P. tcrrae-novae Desv., Fig. 10 {Musca grocnlandica Zett.). — 

 Common. Metallic blackish blue, with black legs and blackish. 



Fig. 10. 



squamulae. Squamula alaris hairy on its dorsal surface, i.e., 

 surface which is dorsal when the wings are closed. No distinct 

 achrosticals cephalad the suture ; usually four anterior dorso- 

 centrals, of which the first and third are much larger than the 



others. Front of male about one-eighth, of female one-third as 

 wide as head. Prostigma black, palpi red, antennae black. 



Protocalliphora.—P. aznrea Fall. (Fig. 1 1) and P. chrysorrhoca 

 Fall. — Very rare. The males are metallic bluish green, with 



