368 CATALOGUE OF NORTH AMERICAN DIPTERA. 



simplex LOE\V, Wien. Ent. Monatsch., v, 40; Cent., vi, 43. Cuba. 



WILLISTON, Synop. X. A. Syrph., 87. San Domingo, 

 sodalis WILLISTOX. Synop. N. A. Syrph., 74. Col. 



tarsatus ZETTERSTEDT, Ins. Lapp., 601 ; Dipt. Scand., 730 (both Scccva) . N. Eu- 

 rope. 



STAGER, Grcenl. Antl., 360, oc. in Greenland. 

 SCHINER, Fauna Austr., i, 302. 

 HOLMGREN, Ins. Spetsb., 26 (Sccci'a dryadis) ; Ins. Nordgroenl., 100 (id.). 



Spitzbergen ; Greenland. 

 WILLISTON, Synop. N. A. Dipt., 294. 

 LUNDBECK, Dipt. Grcenl., I, 302, syn. of Holmgren. Greenland. Ibid., n, 



310. the Vohtcclla lappona of O. FABRICIUS. Fauna Grceni., 208, 169, may 



be this species. 

 torvus OSTEX SACKEN, Proc. Bost. Soc. Nat. Hist., xvm, 139. White Mts., N. 



H. ; Mass., R. I., Canada, Col. 

 ZETTERSTEDT, Ins. Lapp., 509 (Scccva topiarius MEIG.) ; Dipt. Scand., n, 



723 and vni, 3139 (id.). N. Europe. 

 WALKER, List, in, 582 (Syrphus topiarins MEIG.), oc. in Europe, and at 



Martin Falls, Canada. 



SCHINER, Verb. Zool.-Bot. Ges., vn, 347; Fauna Austr.. i, 30; (id.). 

 AYiLLisTox, Synop. N. A. Syrph., 79. Atlantic States and Wash. 

 VERRALL, Brit. Flies, vni, 356. 



CHAGNON, Et. Prelim, les Syrph., 35. Rigaud, Quebec. 

 N. J. Smith Cat. 

 tricolor BIGOT, see vclntiints. 



umbellatarum FABRICIUS, Ent. Syst., iv, 307; Syst. Antl., 250 (Scccva). Europe. 

 SCHINER, Fauna Austr., i, 307. 

 WALKER, List. in. 586 (gitttalns MEIG. and s.\rt.}!tadrahis). Martin Falls 



and Nova Scotia. [O. S. Cat., the former doubtful. 1 

 OSTEX SACKEN, Proc. Bost. Soc. Nat. Hist., xvm, 151. White Mts., N. H. 

 WILLISTON, Synop. N. A. Syrph., 85. Ariz. 

 CHAGNON, fit. Prelim, les Syrph., 32. Sherbrooke, Quebec. 

 VERRALL, Brit. Flies, vni, 409, 676; important. 

 Alaska Johnson, Hunter; N. J. Smith Cat. 



Note. Osten Sacken, Williston and Verrall all indicate doubt whether 

 our American form be the same as the European umbellatarum. 

 velutinus WILLISTON. Proc. Amer. Phil. Soc., xx, 314; Synop. N. A. Dipt., 73.- 



Mt. Hood, Ore. 



BIGOT, Annales, 1884, 73 (Ischyrosyrphus tricolor). Cal. [Will.] 

 COQUILLETT, Proc. Wash. Acad. Sci., n, 431, oc. in Alaska. 

 VERRALL, Brit. Flies, vni, 321, would make Ischyrosyrphns a separate 



genus, and suspects tricolor to be a synonym of latcrnarins MULLER. 

 xanthostoma WILLISTON, Synop. N. A. Syrph., 86. Pa. 

 Province of Quebec Fyles. 



ALLOGRAPTA. 



OSTEN SACKEN, Bull. Buffalo Soc. Nat. Hist., in, 49, 1876; Cat., 246, 1878. 



\\ ILLISTON, Synop. N. A. Syrph., 96, 1886. 



CHAGNON, Et. Prelim, les Syrph., 37, 1901. 

 exotica WIEDEMANN, of Van der Wulp, see fracta. 

 fracta OSTEN SACKEN, West. Dipt., 331. Santa Monica, Cal. 



VAN DER WULP, Tijdschr. v. Ent., xxvi, 2, pi. i, f. 2 (c.rotica WIED.). 

 Guadeloupe. 



