NORTH AMERICAN DIPTERA. 315 



S.4I.PIXGOGASTER. 



Schiner, Novara Exped. 344, 1868. 



COStalis Walker, Dipt. Saunders i, 223 (Amathia). — Brazil, 

 macula Schiner, Novara Exped. 345. — Chili. 

 nigra Schiner, Novara Exped. 345, pi. iv, fi^. 4. — S. America, 

 nigroventris Bigot, Ann. Soc. Ent. Fr. 1884, 329. — Montevideo. 

 pygophora Schiner, Novara Exped. 344. — S. America. 



HIYIOIiEPTA. 



Newman, Entom. Mag. 1838, p. 373. 



haemorrhoidalis Philippi, Verh. Zool. Bot. Gesellsch. xv, 740, 2, pi. xxvii, fia. 

 42 (Priomerus). — Chili. 



luctuosa Philippi, Verh. Zool. Bot. Gesellsch. xv, 739, 1, pi. xxvii, fig. 43 (Prio- 

 merus) ; Schiner, Novara Exped. 367; Bigot, Ann. Soc. Ent. Fr. 1883. 222.— 

 Chili. 

 Helophilus lucfuosus Bigot, Ann. Soc. Ent. Fr. (3) v, 296, pi. vii, fig. 7; Rondani, 

 Archivio por la Zool. iii, 9 {Xiloteja). [This synonymy of H. luctuosus was 

 given as prohahle hy Philippi, but it does not seem at all doubtful.] 



RHIIVGIA. 



Scopoli, Ent. Carniolica, 1763. 



nigra Macquart, Dipt. Exot. ler Suppl. 133, 1, pi. xi, fig. 10. — Columbia. 



Lycastrirhyncha nitens-'' Bigot, Rev. et Mag. Zool. 1859; Ann. Soc. Ent. Fr. 1881. 

 373. — Amazon. 



GL.AUROTRICHA. 



Thomson, Eugenics Re.sa, 493, 1868. 

 musoaria Thomson, Eugenies Resa 493 (Haurotricha), pi. ix, fig. 7. — Buenos Aires. 



PHAL.AC'ROMYIA.t 



Rondani, Esam. d. var. sp. Ditt. Brasil, 67, 1848. 



argentina Bigot, Ann. Soc. Ent. Fr. 1883, 87; Roeder, Stett. Ent. Zeit. 1886, 263.— 



Argentina, Columbia. 

 chalybescens Wiedemann, Auss. Zweifl. Ins. ii, 204, 16 (Volucella) ; Mik, Wien. 



Entom. Zeit. 1883, 284.— Brazil. 



* Mr. Bigot suppresses (1. c.) both Lycastrirhyncha Big. and Lycastris Walk, as 

 not being sufficiently distinct from Rhingia ; at the same time he retains his own 

 genus in his synoptic table of the genera of Syrphidfe (Ann. Soc. Ent. Fr. 1883, 

 230-258) under the group with closed marginal cell, where, indeed, his original 

 diagnosis of the genus would bring it. Macquart describes R. nigra as having 

 " nervures normales" ; if he was correct, R. nigra and L. nitens must be distinct, 

 both specifically and, probably, generically. 



t For dichotomous tables of the known species of Phalacromyia and Volucella, 

 see Bigot, Ann. Soc. Ent. Fr. 1883, 61-83. 



