CATALOGUE OF NORTH AMERICAN DIPTERA. 369 



WILLISTON, Synop. N. A. Syrph., 97, quotes orig. dcsc. ; Biologia, Dipt., 



in, 20, syn. of Wulp's exotica, etc. Cal. ; Guerrero and Durango, Mex. 

 GiGLio-Tos, Ditt. del Me^s., n, 41. Mexico, several places. 

 HUNTER, Canad. Ent, xxvm, 95, female. Cal. 

 obliqua SAY, Jour. Acad. Sci. Phil., in, 89 (Scccva) ; Compl. Works, n, 78 (id.). 



-U. S. 



WIEDEMANN, Auss. Z \veitl.. n, 136 (Syrplius exoticus). Brazil [G. T.] 

 WILLISTON, Synop. X. A. Syrph., 96. Conn, to Cal., etc. 

 MACQUART, Dipt. Exot., n. 2, 100, pi. xvi, f. i (Syrplius sccitrifcrus) ; 



Suppl. i, 139, note on female (id.). N. A.; Savannah. 

 WALKER, List, in, 594 (Sphccrophor'ni baccliidcs) ; Dipt. Saund., 235 (Syr- 



plius dimcnsits). Fla. ; U. S. 

 SCHINER, Novara, 353, oc. in S. A. 

 VAN DER WULP, Tijdschr. v. Ent., x. 44, pi. iv, f. 12 (Svrpluts signatus). 



-N. A. 



OSTEN SACKEN, Cat., 12(>, >yn. 

 WILLISTON, Synop. N. A. Syrph.. 96; Biologia. Dipt, in, 19, bibl., etc. 



U. S., common; Mexico, various places (Argentina Wulp). 

 RILEY, Rept. Dept. Agr., 1889, 351, mentions the larvae as preying on the 



grain Aphis, Siphonophora <.I:'CIKC. 



GiGLio-Tos, Ditt. del Mess., 11, 40, extended bibl., etc. Mexico. 

 CHAGNON, fit. Prelim, les Syrph., 37. St. Jean and Montreal, Quebec. 

 Fla. Johnson ; N. J. Smith Cat. ; Sea Cliff, X. Y. Banks. 



XANTHOGRAMMA. 



SCHINER, Wien. Ent. Monatsch.. iv, 215. 1860; Fauna Austr., i, 318, 1862. 



WILLISTON, Synop. N. A. Syrph., 91, def. and table of species, 1886. 



MIK, Wien. Ent. Zeit., 1897, 65. 



HUNTER, Canad. Ent., xxix, 130, 1897. 



VERRALL, Brit. Flies, vm, 447, 1901. 



CHAGNON, fit. Prelim, les Syrph., 74, 1901. 

 aequalis LOEW, Cent., iv. 84 (Doros). Pa. 



WILLISTON, Synop. N. A. Syrph., 95, pi. iv, f. 6. D. C. . 



N. J. Smith Cat. 

 divisa WILLISTON, Proc. Amer. Phil. Soc., xx, 311; Synop. X. A. Syrph., 92. 



Wash., White Mts., X. H. 



emarginata SAY, Jour. Acad. Sci. Phil, in. 91 (.SYa-ro); Compl. Works, n, 79 

 (id.). E. Fla. 



WIEDEMANN, Auss. Zweifl.. n, 119 (Syrplnis). E. Fla. 



WILLISTON, Synop. X. A. Syrph., 93. Fla., Pa., X. H. 



X. J. Smith Cat. 



felix OSTEN SACKEN. Bull. Buff. Soc. Xat. Sci., in, 67; Cat., 247. West Point, 

 X. Y.; Pa., 111. 



\VILLISTON, Proc. Amer. Phil. Soc., xx, 311; Synop. X. A. Syrph., 91.- 



Conn. 

 flavipes LOEW, Cent., iv, 83 (Doros). Pa. 



WILLISTON, Synop. X. A. Syrph., 94. Conn. 



CHAGNON, fit. Prelim, les Syrph., 74. Montreal. 



N. Y. O. S. Cat. ; X. J. Smith Cat. ; Sea Cliff, : -Banks 

 nabilis SNOW, Kans. Univ. Quart., in, 238.- X. M. 

 insularis BIGOT, Annales, 1883, 330 (Doros). Cuba. 



WILLISTON, Synop. X. A. Syrph., 299, note; may be a true Doros. 



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