39^ CATALOGUE OF NORTH AMERICAN DIPTERA. 



MERODON. 



Meigen, Illig. Mag., ii, 274, 1803; Syst. Beschr., iii, 349, 1822. 

 ScHiNER, Fauna Austr., i, 343, 1862. 

 Verrall, Brit. Flies, viii, 555, 1901. 

 equestris Fabricius, Ent. Syst., iv, 292 (Syrphus cqucstris and Havicans) ; Syst. 



Antl., 196, 239, 240 {Merodon equestris, Eristalis narcissi and ferru- 



gineiis). — Europe; larvae in bulbs of Narcissus, etc. 

 Meigen, Syst. Beschr., iii, 352-354 (equestris, transversalis, constans, and 



nobilis). 

 RoNDANi, Nuovi ann. di Bologna, 11, 4, 254 {ttiberculatus and bulborum). 

 ScHiNER, Fauna Austr., i, 344. 

 Osten Sacken, Cat., 135, note on occasional importation of larvae in 



bulbs from Europe. 

 Verrall, Brit. Flies, viii, 556, figs. 

 Montreal — Johnson in litt. 



TRIODONTA. 



WiLLisTON, Bull. Brooklyn Ent. Soc, vii, 136, 1885 ; Synop. N. A. Syrph., 



205, 1886. 

 Macquart, Dipt. Exot, Suppl. iv, 144, 1850 {Polydonta, preoc). 

 curvipes Wiedemann, Auss. Zweifl., 11, 149 {Merodon). — N.,A. 



Macquart, Dipt. Exot., Suppl. i, 132, pi. 11, f. 7 (Helophilus albiceps), 



female; Suppl. iv, 144, pi. xiii, f. 6 {Polydonta bicolor), male. — Both 



Nova Scotia. 

 Walker, List, iii, 599 {Merodon morosus). — Nova Scotia. 

 Osten Sacken, West. Dipt., 338, notes (Polydonta) : Cat., 135, syn. 

 WiLLisTON, Synop. N. A. Syrph., 206, pi. ix, f. i. — New Eng., Cal., Col. 

 N. J.— Smith Cat.; Sea Cliff, L. I.— Banks. 



TEUCHOCNEMIS. 



Osten Sacken, Bull. Buff. Soc. Nat. Sci., iii, 58, 1876; Cat., 250, 1878, 

 desc. quoted. 



WiLLiSTON, Synop. N. A. Syrph., 199, 1886. 



Chagnon, 6t. Prelim, les Syrph., 54, 1901. 

 bacuntius Walker, List, iii, 563 (Milesia). — Ga. 



Osten Sacken, Bull. Buff. Soc. Nat. Sci., in, 58; Cat., 250, notes on 

 genus. 



WiLLisTON, Synop. N. A. Syrph., 200, pi. vii, f. 6. — Ga., Tex. 



N. J.— Smith Cat. 

 lituratus Loew, Cent, iv, 81 (Pterallastes). — Pa. 



Osten Sacken, Bull. Buff. Soc. Nat. Sci., in, 58; Cat., 250, notes. 



WiLLiSTON, Synop. N. A. Syrph., 200, pi. viii, f. 12. — Pa., Conn., Mo. 



Chagnon, fit. Prelim, les Syrph., 54. — Rigaud, Quebec. 



PTERALLASTES. 



Loew, Cent., iv, 80, 1863. 



WiLLiSTON, Synop. N. A. Syrph., 198, 1886. 

 perfidiosus Hunter, Canad. Ent., xxix, 139, fig. — Br. Col. 

 thoracicus Loew, Cent., iv, 80. — Pa. 



WiLLiSTON, Synop. N. A. Syrph., 198, pi. viii, f. 9. — Pa. 



N. J.— Smith Cat.; Sea Cliff, L. L— Banks. 



