144 C. H. TYLER TOWNSEND. 



Pseiidomyothyria Towns., N. Am. Tach. iii, Tr. Am. Ent. Soc. xix (1892). 

 Myothyria v. d. Wulp, Biol. Cent.-Amer. Dipt, ii, 208 (1890). 

 Bumyothyria Towns., N. Am. Tach. iii, Tr. Am. Ent. Soc. xix (1892). 

 Bhinophora R. Desv.. Myod, 258 (1830); Schin., Dipt. Atistr. i, 545. 

 Leucostoma Meig., lUig. Mag. ii. 280 (1803) ; Scliin., Dipt. Anstr. i, 542. 

 Phyto E. Desv., Myod. 218 (1830) : Schin., Dipt. Austr. i, 547. 

 Vanderwulpia Towns., N. Am. Tach. ii, Tr. Am. Ent. Soc. xviii, 381 (1891). 

 Euthera H. Loew, Centiir. vii, 85 (1866). 

 Cestonia Edi., Pr. Dipt. ital. iii (1859). 



Scopolia E. Desv., Myod. 268 (1830) ; Schin., Dipt. Austr. i, 539. 

 Euscopolia Towns., N. Am. Tach. iii, Tr. Am. Ent. Soc. xix (1892). 



It may be well to note the following synonymies : 



Saundersia: syn. Epalpns Rdi. 



Nemochseta: syn. fTachinodes Br. and Bgst., Muse. Schiz. 65 (1889). 



Meig-enia : syn. SpUosia Rdi.. Pr. Dipt. ital. iii. 111 (1859). On authority of v. 



d. Wulp (Biol. Cent.-Amer.). 

 Exorista: syu. ? Eurygaster Macq., Hist. Nat. Dipt, ii, 115 (1835); Dipt. Ex. ii, 



3. 57. On authority of v. d. Wulp (1. c). 

 Phasiopteryx ; syn. Neoptera v. d. W., Biol. Cent.-Amer.; Dipt, ii 165 (1890). 



On authority of v. d. Wulp (1. c). 

 Phyto : syn. Ptilocera R. Desv., Myod. 221 (1830). 



THE NORTH AMERK^AIV GEIVERA OF NEMOCEROUS 

 DIPTERA. 



BY C. H. TYLER TOWNSEND. 



Principally for my own convenience in the identification of species, 

 I some time ago drew up synopses of the North American genera of 

 Nemocera. Dr. Williston's book on the families and genera of N. 

 American Diptera omits the genera of Nemocera and Muscidse seni^. 

 lot. I have already published, above, generic synopses of the 

 Calyptrate MuscidiB, and the following tables of the Nemocera, as 

 supplying a hiatus that has perhaps been felt by others as well as 

 myself, are herewith published. 



These tables should not be trusted without reference to the generic 

 descriptions. They contain all the genera given in the Osten Sacken 

 Catalogue, and all the new genera since described from America 

 north of Panama. Some European genera, which are omitted be- 

 cause they have not been recorded from this country, may yet be 

 found to occur here. The tables have been prepared from descrip- 

 tions almost solely, and are offered only as a basis for generic de- 

 terminations. They have, however, been largely verified by actual 



