CATALOGUE OF NORTH AMERICAN DIPTERA. 369 



WiLLiSTON, Synop. N. A. Syrph., 97, quotes orig. desc. ; Biologia, Dipt., 



Ill, 20, sj^n. of Wulp's exotica, etc. — Cal. ; Guerrero and Durango, Mex. 

 GiGLio-Tos, Ditt. del Mess., 11. 41. — Mexico, several places. 

 Hunter, Canad. Ent., xxviii, 95, female. — Cal. 

 obliqua Say, Jour. Acad. Sci. Phil., iii, 89 (Sccsva) ; Compl. Works, 11, 78 (id.). 



— U. S. 

 Wiedemann, Auss. Zweifl., 11, 136 (Syrphtis cxoticus). — Brazil. [G. T.] 

 WiLLiSTON, Synop. N. A. Syrph., 96. — Conn, to Cal., etc. 

 ^NIacquart, Dipt. Exot., 11, 2, 100, pi. xvi, f. i {Syrphtis scciirifcrus) ; 



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

 Walker, List, in, 594 (Sphccrophoria hacchides) ; Dipt. Saund., 235 {Syr- 



plius dimensiis). — Fla. ; U. S. 

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

 Van der Wulp, Tijdschr. v. Ent., x, 44, pi. iv, f. 12 (Syrphus signatus). 



— N. A. 

 OsTEN Sacken, Cat., 126, syn. 

 WiLLiSTON, Synop. N. A. Syrph., 96; Biologia, Dipt., iii, 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 avcncc. 

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

 Chagnon, fit. Prelim, les Syrph., 2>7- — St. Jean and Montreal, Quebec. 

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



XANTHOGRAMMA. 



Schiner, Wien. Ent. Monatsch., iv, 215, i860; 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, viii, 447, 1901. 



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

 aequalis Loew, Cent., i\', 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. N. A. Syrph., 92. — 



Wash., White Mts., N. H. 

 emarginata Say, Jour. Acad. Sci. Phil., iii, 91 (Sccrva) ; Compl. Works, 11, 79 

 (id.).— E. Fla. 



Wiedemann, Auss. Zweifl., 11, 119 (Syrphus). — E. Fla. 



Williston, Synop. N. A. Syrph., 93. — Fla., Pa., N. H. 



N. J.— Smith "Cat. 

 felix Osten Sacken, Bull. Buff. Soc. Nat. Sci., in, 67; Cat., 247. — West Point, 

 N. Y.; Pa., 111. 



Williston, Proc. Amer. Phil. Soc, xx, 311; Synop. N. A. Syrph., 91. — 

 Conn. 

 flavipes Loew, Cent., iv, 83 (Doros). — Pa. 



Williston, Synop. N. A. Syrph., 94. — Conn. 



Chagnon, fit. Prelim, les Syrph., 74. — Montreal. ^ 



N. Y.— O. S. Cat. ; N. J.— Smith Cat. ; Sea Cliff, N. Y.— Banks, 

 nabilis Snow, Kans. Univ. Quart., in, 238. — N. M. 

 insularis Bigot, Annales, 1883, 330 (Doros). — Cuba. 



Williston, Synop. N. A. Syrph., 299, note ; may be a true Doros. 

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