THS CANADIAN ENTOMOLOGIST. 233 



I 



Chilosia plumata, Loew, Cent. IV., 68, 1863.— O. S. Cat.N. A. Dipt., 1878, 

 121. Will. Synopsis, 42, 1886. Virginia. 



Chilosia prima, Hunter, Can. Ent. XXVill., 92, 1896. Pennsylvania, 



Chilosia signatiseta. Hunter ante. Idaho. 



Chilosia sorocula. Will., Biol. Cent. Am. Dipt. Ill, 1891. Snow, Kans. 

 Uni., Quart. III., 228. Mexico : Omilteme, 8,000 feet ; Xucuma- 

 natlan, 7,000 feet ; Sierra de las Aguas Escondidas, 7,000 feet; — all 

 in Guerrero, U. S., New Mexico. 



Chilosia sororia, Will.j Biol. Cent. Am. Dipt. III., 9, 1891. Mexico. 

 Ciudad in Durango, 8,100 feet. 



Chilosia tarda, Snow, Kans. Uni., Quart. Vol. III., 228. Colorado. 



Chilosia Townsendi, Hunter, Can. Ent., Vol. XXVIII. , 94, 1896. 

 California. Chilosia sp., ? Townsend, Dipt. Baja, Cala., in Proc. 

 Cala. Acad. Sci. Series ii., Vol. 4, 611: 



Chilosia tristis, Loew, Cent. IV., 71, 1863.— O. S. Cat. N. A. Dipt., 1878, 

 121. Will. Synopsis, 41. Red River. (Loew.) 



Chilosia versipellis, Will., Synopsis 44. State of Washington. 



Chilosia WiUistoni, Snow, Kans. Uni,, Quart. Vol. III., 227 {1895). 

 Cala.; Col. This species was described as C. lugiib?-is by Williston — 

 Synopsis, p. 45, 1886. Snow has suggested the present name 

 because "the namt /ugtidr is is preoccupied for a Swedish Chilosia 

 by Zetterstedt." According to Herr T. H, Becker, Zetterstedt's species 

 will not stand, as the types of that species are partly teneral forms of a 

 well-known species of Meigen and partly mature specimens of other 

 species. However, this does not affect the propriety of Mr. Snow's 

 suggestion which I have adopted, 



SPECIES NOT included ABOVE. 



Chilosia frontosa. Bigot, Ann. Soc. Ent. Fr., 1883, 552. Will. Synopsis, p. 

 46. Mexico, 



Chilosia rufipes, Bigot, Ann. Soc. Ent. Fr,, 1884, 555 (Melanogaster). 



It is quite probable that this species is a Chilosia, from the fact 

 that Mr. Bigot, in his table for the separation of the genera of 

 SyrphidiB, distinguishes Melanogaster from Cartosyrphus by the fact 

 that in the former genus, " Face, female, pourvue de sillons 

 lateraux." 



It will be impossible to recognize the species from the descrip- 

 tion, as the three very important characters — the bareness or pilosity 

 of the eyes and arista, and the presence or absence of bristles on the 

 scutellum — are entirely omitted. — North America (Bigot). 



Chilosia, n. sp. ? Snow, Kans. Uni., Quart. Vol. III., 229. Colorado. 



