CATALOGUE OF NORTH AMERICAN DIPTERA. 345 



WIEDEMANN, Auss. Zweifl., ii, 79, 1830 (Ccratophya) . 



MACQUART, Hist. Nat. Dipt., i, 486, 1834 (Chymophila). [O. S.] 



NEWMAN, Ent. Mag., v, 372, 1838 (Dimcraspis) . 



WALKER, List, iv, 1157, 1849 (Mesophila) ; Dipt. Saund., 217, 1856 (17;- 



ristes). 



SCHINER, Fauna Austr., i, 249, 1862. 

 WILLISTON, Synop. N. A. Syrph., 3, 1886, def. and table of species; Biolo- 



gia, Dipt., in, 2, 1891, syn., etc. 

 GiGLio-Tos, Boll. Mus. Zool, vi, No. 108, 4, 1891 ; Ditt. del Mess., i, 38, 



1892 (both Omegasyrphus). [Will] 



WHEELER, Psyche, July, 1901, larva in nest of Pseudomyrmex in Mex. 

 VERRALL, Brit. Flies, vm, 658, 1901. 



CHAGNON, fit. Prelim, les Syrph., 13, 190, table of Quebec species, 1901. 

 aquilinus GiGLio-Tos, Boll. R. Univ. Torino, vn, No. 123, 1892; Ditt. del Mess., 



i, 37. Tuxpango, Mex. 

 aurifex WIEDEMANN, Auss. Zweifl., 11, 85. Brazil. 



MACQUART, Hist. Nat. Dipt., i, 486 (Chymophila splendens) ; Dipt. Exot., 



n, 2, 10 (id.) ; ii, 3, ii (Aphritis aurifex). Philadelphia; Para. 

 WALKER, Ins. Saund., 216 (trocliilns). Mex. [Will.] 

 OSTEN SACKEN, Bull. Buff. Soc. Nat. Hist., Nov., 1875, on type of Chy- 

 mophila splendens; quoted by Williston, Synops., 12. 

 WILLISTON, Synop. N. A. Syrph., 9, 10; Biologia, Dipt., in, 2, pi. i, f. 2. 



Mex. ; Guerrero and Tehuantepec. 



aurulentus FABRICIUS, Syst. Antl., 185 (Mulio). Carolina. 

 WIEDEMANN, Auss. Zweifl., n, 86. 

 MACQUART, Dipt. Exot., ii, 2, 12, pi. n, f. i (Apliritis) ; Suppl. n, 2, 38 



(Apliritis crassitarsis) . Carolina ; Rio Negro. 



F. LYNCH ARRIBALZAGA, Dipt. Argent., 126 (crassitarsis). Argentina. 

 WILLISTON, Synop. N. A. Syrph., ii, transl. Wied. and Macq. 

 GiGLio-Tos, Ditt. del Mess., i, 35, oc. in Orizaba. 

 JOHNSON, Ent. News, xn, 94, oc. in Pa. 

 baliopterus LOEW, Cent., x, 56. Texas. 



WILLISTON, Synop. N. A. Syrph., 5, pi. i, f. 4. 



Charlotte Harbor, Fla. Johnson (Omegasyrphus). 



WILLISTON, Biologia, Dipt., in, 3, oc. and note. Texas; Guerrero and 



N. Yucatan, Mex. 



bombiformis TOWNSEND, see megalogaster. 

 chrysopyga GiGLio-Tos, Boll. R. Univ. Torino, vn, No. 123, 1892 ( Ubristes) ; 



Ditt. del Mess., i, 37 (id.). Orizaba, Mex. 

 coarctatus LOEW, Cent., v, 47. D. C. 



WILLISTON, Synop. N. A. Syrph., 6, transl. orig. desc. 

 GiGLio-Tos, Boll. R. Univ. Torino, vn, No. 118, 1892; Ditt. del Mess., i, 

 39, pi. i, f. ii (both Omegasyrphus, type of new genus). Tuxpango, 

 Mex. 



Orlando, Fla. Johnson (Omegasyrphus). 

 cothurnatus BIGOT, see tristis. 

 falcatus WILLISTON, Synop. N. A. Syrph., 9; Biologia, Dipt., in, 3, notes. 



Guerrero and Tehuantepec, Mex. 

 GiGLio-Tos, Ditt. del Mess., i, 36. Tehuacan, Mex 

 fulgens WIEDEMANN, Auss. Zweifl., n, 82. Ga. 



GRAY, in Griffith's An. Kingd., Ins., n, pi. cxxv, f. 2 (euglossoides) . 

 MACQUART, Dipt. Exot., Suppl., i, 122 (Aphritis). Guiana, Fla. 

 WILLISTON, Synop. N. A. Syrph., ii, orig. desc., etc. 



