No. 6.] CALLIPHORINAE OF THE UNITED STATES. 287 



coviprcssa Dcsv., viortiseqjia Kirby, and myoidca Desv. are 

 Cynomyia cadavcrina Desv. ; obscocna Eschholz is vomitoria 

 L.; lilaea Walk., and vidua Desv. are erytJwocepJiala Meig. ; 

 tcrmc-novac Macq. is viridcscens Desv. 



Lucilia. — All our species are of brilliant metallic colors. 

 The chaetotaxy is invariable for each species, except for an 

 occasional evident deformity, and it differs in the different 

 species only in the number of achrostical bristles. 



Two postacrosticals (Fig. 7). — Front of male linear, of female one-third 

 as wide as the head ; abdomen unicolorous . . . caesar L. 



Front of male not linear, at narrowest part about one-eighth as wide as the 

 head ; front of female about one-fourth as wide as the head ; abdo- 

 men not unicolorous, first segment and hind margins of second and 

 third blackish, contrasting strongly with the remainder 



pilatei nov. sp. 



Three postacrosticals. — Palpi black ; front of male very narrow, that of 

 female about one-third as wide as the head ; abdomen with two stout 

 marginal macrochaetae on the second abdominal segment 



sylvaniin Meig. 



Palpi yellow ; front of male varies from one-eighth to one-sixth as wide as 

 the head, that of female about one-third as wide as the head ; second 

 abdominal segment without marginal macrochaetae (Fig. 8) 



sericata Meig. 



L. pilatei nov. sp., Tifton, Ga. Collected in June, August, 

 September, and October by Mr. G. R. Pilate, in whose honor I 



name it. Five males and seventeen females. Dorso ventral 

 diameter of head greater, as compared with the transverse 



