CATALOGUE OF NORTH AMERICAN DITTERA. 373 



W'lLLisTON, Synop. N. A. Syrph., 105, pi. iv, f. 16. — New Eng., Wash., 

 Col., N. U. 



RiLEV, Rept. Dept. Agr., 1889, 351, mentions the larvae feeding on grain 

 Aphis, Siplwiiopliora avcncr. 



Chagxon, fit. Prelim, les Syrph., 41. — Quebec, common. 



N. A., in nearly all local lists. 

 dubia Bigot, Annales, 1884, loi. — Cal. 



WiLLiSTON, Synop. N. A. Syrph., 108, quotes orig. desc. 

 forreri Giglio-Tos, Ditt. del Mess., 11, 32. — Solco and Cuernavaca, Mex. 



Wtlliston, Biologia, Dipt., in, 23 (" Spliccrophoria — .'"). — Durango, 

 Mex. 

 fulvicauda Bigot, Annales, 1884, 104. — jNIex. 

 hieroglyphica Meigen, Syst. Beschr., in, 327 (Syrphus). — Europe. 



Walker. List, in, 593, oc. in Nova Scotia. 

 infumata Thomson, Eugen. Resa, 501. — Cal. 



WiLLiSTON, Synop. N. A. Syrph., 109, quotes orig. desc. 

 melanosa Williston, Synop. N. A. Syrph., 106.^ — Cal. 



Hudsonian Zone, N. M. — Cockerell. 

 menthastri Linne, Fauna Suec, 2d ed., no. 1819 (Miisca). — Europe. 



Walker, List, in, 593, oc. in Canada and New York. 

 micrura Osten Sacken, West. Dipt., 330. — Sonoma Co., etc., Cal. 



Williston, Synop. N. A. Syrph., 107; Biologia, Dipt., in, 21, notes. — 

 Cal. ; Guerrero, Mex. 



GiGLio-Tos, Ditt. del Mess., 11, 33. — Orizaba, 

 nasuta Bigot, Annales, 1884, 103, see Baccha. 

 nasuta Bigot, Annales, 1888, 253. — Mex. 

 pachypyga Bigot, Annales, 1884, 104. — Mex. 

 picta Meigen, of Holmgren, Ins. Nordgrcenl, 100, see scripta. 

 picticauda Bigot, Annales, 1884, 102. — Mex. 



Williston, Biologia, Dipt., in, 21. — Guerrero and Tabasco, INIe-x. 



GiGLio-Tos, Ditt. del Mess., n, 34, notes. — Mexico, several places. 

 pyrrhina Bigot, Annales, 1884, loi. — Cal. 



Williston, Synop. N. A. Syrph., 108, quotes orig. desc. 

 rostrata Bigot, Annales, 1884, 102. — Mex. 



scripta Linne, Syst. Nat., loth ed., 594 (Musca) ; Fauna Suec, 2d ed., 449 

 (id.). — Europe. 



ScoPOLi, Ent. Cam., 965 (Coiiops gcmniafus) . 



Fabricius, Syst. Ent., 772 (Syrphus) ; Spec. Ins., n, 434 (id.) ; Ent. Syst.. 

 IV, 308 (id.) ; Syst. Antl., 252 {Scc€va). 



Fallen, Syrphici, 48 (Scava). 



Meigen, Syst. Beschr., in, 324 (Syrphus). 



Macouart, Dipt, du Nord de la France, 1827, 218; Hist. Nat. Dipt., i, 



551- 

 Zetterstedt, Ins. Lapp., 605; Dipt. Scand., n, 766 and viii. 3157 (all 



Scceva) . 

 Walker, List, in, 592, oc. in Nova Scotia. 

 Schiner, Verh. Zool.-Bot. Ges., vii, 369 (Melithrcptus) ; Fauna Austr., 



I, 316 (id.). 

 Rondani, Dipt. Ital. Prod., 11, 112. 



Van der Wulp, Tijdschr. v. Ent., xxvi, 8, oc. at Quebec (Melithrcptus). 

 KowARZ, Wien. Ent. Zeit., iv, 133, varieties, etc. 

 Williston, Synop. N. A. Syrph., 107, transl. Schiner; not seen. 

 Verrall, Brit. Flies, vin, 432. 

 var. strigata Stager, Groenl. Antl., 362. — Greenland. 



