CATALOGUE OF NORTH AMERICAN DIPTERA. 42 I 



Dimorphomyia calliphoroides Bigot. Bull. Soc. Ent. France, 1885, has been 

 found on examination of the type to consist of the head of a Syrphid glued to 

 the body of a Muscid. See Braver. Sitzungsbericht Kaiserl. Akad., cvii, 14. 

 We may say at least that it was admirably named I 



Eggonia Van der Wulp, mentioned by Brauer and Bergenstamm. Zweifl. 

 Kaiserl. Mus., vi, 104, lacks a specific name for the type, and must have been 

 a manuscript name on some of Van der Wulp's material. 



Eurigaster Maco. is a synonym of Exorista, but E. septcutrjoualis Walker 

 will be found under Euphoroccra claripcnnis. 



Fabricia Desv. is a synonym of Echinomyia, but Bigot's F. infuinaia will be 

 found under Archytas bicolor. 



Loewia Egger; the species of Townsend all fall under Myiophasia cciica. 



Lophosia setigena Thomson has been placed under Clausicclla. 



Lydella doryphorae Riley will be found under Phorocera, although the genus 

 is a synonym of Exorista. 



Melanosphora diabroticse Shimer is a Cclatoria. 



Micropalpus is a synonym of Liiinccmyia, but some of the species are placed 

 under Epalpus and Cuphoccra. 



Oplisa albifacies Bigot is referred to Pscudodcxia by Brauer, and O. nigri- 

 facics to Medina. 



Pachychasta jarowchewskyi Portschixsky. from Russian America, is listed 

 by B. and B. among the material in the Vienna ^Museum ; but I have found no 

 other reference to it. 



Phasia atripennis Say is referred to Xanfhflinclana. and jngatoria to Tricho- 

 poda pciuiipcs. 



Podotachina americana B. B. is referred to Tachiiia niclla. and P. z'ibrissata 

 B. B. to Euplioroccra claripcnnis. 



Pseudogermaria georgiae B. B. is referred to Disticlwna. 



Ptilocera americana AIaco. is referred to Phyfo. 



Pyrrosia ochracea Bigot is referred to CEstrophasia. 



Siphoniomyia melas Bigot is referred to Trichophora analis. 



Thysanomyia inermis Bigot, mentioned by Johnson, Dipt, of Florida, may be 

 Blcpharipeza inermis, but I am not certain. 



The species of Tryphera described by Townsend all go in Polidca. 



Viviana citrina Bigot will be found under Chcctoiia longiscta; gcorgicc in 

 Biomyia; and riifopygata in Lcskia. 



Wahlbergia is a synonym of Bcsscria. but Townsend's atripennis is a Xantlw- 

 mclana. 



Xysta didyma Loew is a Clyfioniyia. 



CISTOGASTER. 



Latreille, in Cuvier"s Regne Anim., v. 1829. 



Desvoidy, ^lyodaires. 239. 1S30 (Pallasia). 



ScHiNER, Fauna Austr., i, 411. 1862. 



Brauer and Bergenstamm, Zweifl. d. Kaiserl. jNIus.. vi, 156, 157 (the 



latter as Gymnoclytia), 1893. 

 Townsend, Canad. Ent., xxv, 166; Annals and Mag. Nat. Hist., xx, 284, 



table of species ; both articles contain speculations on the synonymy of 



the genus. 

 \'AX DER Wulp, Biologia, Dipt., 11, 445, 1903, table of Mexican species. 

 ferruginea Van der Wulp. Tijdschr. v. Ent., xxxv, 187; Biologia, Dipt., 11, 448. 



— Guerrero and Tabasco. ]Mex. 



