NOKTII AMKKICAN DIPTEKA. 277 



d. Wiilp states (Biol. C.-A. Dipt, ii, 264) that the type, exam- 

 ined by him, bears a striking resemblance to the 9 oi' Phasiop- 

 teryx bilimeki B. & B. 



Megerlea R. D. Rdi. — A single species from the Rocky Mountains 

 is referred here by Bigot, on the strength of whicli tiie genus is 

 included. 



Morphoimjla Rdi. — Included on a sj)ecies from California referred 

 here by Bigot. 



Sericocera Mcq. Hist. Nat. ii, 165 ; Di[)t. Exot. ii, 3, 67, pi. vii, fig. 5. 

 — This genus has been divided by Schiner into two Tachinid 

 and three Dexiid genera. The latter are Mintho, Thelaira and 

 Melanio.. As nearly as can be judged from the figure and de- 

 scription, S. pictlpeimis Mcq. belongs to Thelaira, which is in- 

 cluded on this supposition. But the figure shows a short stump 

 at bend of fourth vein, and the macrochiTstse are only marginal. 

 It is quite distinct from Thelairodes v. d. W., aind very prob- 

 ably does not belong to Thelaira. 



Phorostoma R. D., Sch. — Included on authority of Bigot, who refers 

 two species to this genus. 



Myodoma R. D. Myod. 827. — This genus is insufficiently distinguished 

 from Phorostoma R. D. Bigot has referred one species here. 



References to Descriptions of Genera. 



Hystrisiphona Bigot, Revue et Mag. Zool. 18.^9, p. 309 (1859); v. d, W.. Biol. 



C.-A. Dipt, ii, 214. 

 Prorhynchops Brauer aiul v. Berg., Muse. Schiz. ii, 60, [364.] (1891). 

 Prosena St. Faig. and Seiv., Euc. Metii. x, 500 (1825); Sch., Dipt. Austr. i, 557. 

 Mochlosoma Br. and Bgst. Muse. Schiz. i, 58, [126,] (1889). 

 Myiomima Br. Bgst. Muse. Schiz. i, 51, [119,] (1889). 

 Hystrichodexia v. Roder, Stett. Eiit. Zeit. 1886, 266 (1886) ; v. d. W., Biol. ('.- 



A. Dipt, ii, 218. 

 Bathydexia v. d. Wulp, Biol. C.-A. Dipt, ii, 222 (1891). 



Scotiptera Macquart, Dipt. Ex. ii, 3, 83 (1843) : v. d. W., Biol. C.-A. Dipt, ii, 223. 

 Myocera Rob. Desv. Myod. 328 (1830) ; v. d. W., Biol. C.-A. Dipt, ii, 236. 

 Tromodesia Rondaui, Dipt. Ital. Pr. i, 87 (1856) ; 1. c. v, 144 (1862); v. d. W., 



Biol. C.-A. Dipt, ii, 237. 

 Stomatodexia Br. Bgst., Muse. Scliiz. i, 57, [125,] (1889); v. d. \V., Biol. C.-A. 



Dipt, ii, 238. 

 Megerlea Rob. Dcsv. Myod. 266 (1830). 

 Meg-aparia v. d. W., Biol. C.-A. Dipt, ii, 240 (1891). 

 Melanophora Meigeu, lUiger's Mag. ii, 279 (1S03); Siu., Dipt. Austr. i, 552. 



TRANS. AM. KNT. SOC. XIX. DECEMBER, 1892. 



