39 2 ^CATALOGUE OF NORTH AMERICAN DIPTERA. 



WILLISTON, Synop. N. A. Syrph., 207, pi. ix, f. 2. Conn., Canada. Wash. 

 CHAGNON, fit. Prelim, les Syrph., 60. Montreal. 

 N. J. Smith Cat.; Sea Cliff, N. Y. Banks. 



PLATYNOCHJETUS. 



WlKDE.MAXX. AllSS. ZwClfl., II, \\~ , 1830. 



niger GiGLio-Tos, Boll. R. Univ. Torino, vii. No. 123, 1892; Ditt. del Mess., n, 

 20, pi. ii, f. i. Orizaba, Mex. 



HELOPHILUS. 



MEIGEN, Illig. Mag., n, 274, 1803 (Elophilus) ; Syst. Beschr, in, 368, 1822. 



SCHINER, Fauna Austr., i, 337, 1862. 



BIGOT, Bull. Soc. Ent. France, 1883, No. 2 (Eurhimyia) ; Annales, 1883, 

 242 (id.). 



WILLISTON, Synop. N. A. Syrph., 183, 295, def. and table of species, 1886. 



VERKALL, Brit. Flies, vm, 523, 1901. 



CHAGNON, fit. Prelim, les Syrph., 56, 1901. 

 aureopilis TOWN SEND, see hrins. 

 androclus WALKER, List, in, 612 (Eristalis). Martin Falls, Canada. 



OSTEN SACKEN, Cat., 250, note on type. 

 bilinearis WILLISTON, Synop. N. A. Syrph., 295. Col. 



Montreal Chagnon. 

 borealis STAGER, Kroyer's Tidsk., N. R., i, 359. Greenland. 



LOEW, Stett. Ent. Zeit., vi, 123, 1843. 



WILLISTON, Synop. N. A. Syrph., 185, transl. Loew's desc. 

 chalepus WALKER, Dipt. Saund., 247 (Eristalis~). Canada. 



OSTEN SACKEN, Cat., 250, note on type, 

 chrysostoma WIEDEMANN, Auss. Zweifl., n, 174 (Erislalis). Ga. 



WILLISTON, Synop. N. A. Syrph., 190, pi. vm, f. 5. New Eng., N. Y. 



N. J. Smith Cat. ; Montreal Chagnon. 

 conostoma WILLISTON, Synop. N. A. Dipt., 193, pi. vm, f. 3. Conn. 



OSTEN SACKEN, Cat., 134 (liucatiis FAD.). Mass., 111., Canada. 



? WALKER, List, in, 603 (anansis). Martin Falls, Canada. 



CHAGNON, fit. Prelim, les Syrph., 57. Rigaud and Levis, Quebec. 



N. J. Smith Cat; Sea Cliff, L. I. Banks. 



Note. Walker's name is prior, but in this difficult group there is too 



much uncertainty to justify changing the name at present. 

 distinctus WILLISTON, Synop. N. A. Syrph., 192. Conn., Ya., Pa. 



N. J. Smith Cat. 

 divisus LOEW, Cent., iv, 78. D. C. 



WILLISTON, Synop. N. A. Syrph., 195, transl. orig. desc. 



HUNTER, Canad. Ent., xxix, 138, 140, male. N. J. 



N. J. Smith Cat. ; Orlando, Fla. Johnson. 

 dychei WILLISTON, in Hunter's article, Canad. Ent., xxix, 136. Sitka. 



Alaska Coquillett; N. M. Coquillett. 

 flavifacies BIGOT, Annales, 1883, 344. Md. 



WILLISTON, Synop. N. A. Syrph., 197, quotes desc. 



HUNTER, Canad. Ent., xxix, 139, quotes part of desc. 

 formalis WALKER, List, in, 603. Mex. 

 f rater WALKER, List, in, 613 (Eristalis). -Martin Falls, Canada. 



OSTEN SACKEN, Cat., 250, note on type. 

 glacialis LOEW, Stett. Ent. Zeit., 1843, 120. Labrador. 



WILLISTON, Synop. N. A. Syrph., 184, transl. orig. desc. 



