96 THEREVIDAE. 



Thcreva hacmorrlwidalis Macquart; Dipt. Exot. IT, 1, 26, 9 (cj). 

 *iiotata Wiedemann, Dipt. Exot. I, 114, 85 Auss. Zw. I, 2o6, 14 



(Tltercvu). — Georgia. 

 *l)ictli)eniiis Wiedemann, Dipt. Exot. 113, 6 (Thereva); Auss. Zw. I, 



235, 11 (id). — Georgia. 



* platancala Loew, Zeitschr. fur Ges. Naturw. Dec. 1876., 321. — Texas. 



* ruliyentris Loew, Centur. VIII. 17. — Nebraska 

 *scutellaris Loew, Centur. IX, 74. — Distr. Columbia. 

 *Tariegata Loew, Centur. IX, 73. — Canada. 



*costalis Loew, Centur. VIII, 16. — California. 



*laevii2:ata Loew, Zeitschr. fur Ges. Naturw. Dec. 1876, 319. — San 



Francisco. 

 *longii)es Loew, Centur. VIII, 11. — Cuba. 

 nigra Bellardi, Saggio, etc. II, 92 (Dr. Schiner, in Novara etc. 146, 

 identifies this species with one from Chile, but changes the name 

 for P. pcntlwptera on account of P. nicira Say). — Mexico. 

 *l)latycer.a Loew, Centur. II, 290, line 3 from bottom. 



Thtreva laticonns Loew, Centur. VIII, 14. — Cuba [change of 

 name by the author]. 

 imivittata Bellardi, Saggio, etc. II, 90. — Mexico. 

 Suiuichrasti Bellardi, Saggio, etc. II, 91. — Mexico. 



Tliercva. 



Latreille, Precis etc. 1796; Thercua (Loew). (^^''). 



*all)iceps Loew, Centur. IX, 69. — Red River of the North; Lake 

 Winnipeg. 

 albifrons Say, J. Acad. Bhil. VI, 156; Compl. Wr. II, 353. — 

 Indiana. 

 ♦candidata Loew, Centur. VIII, 10. — Northern United States; 

 Canada. ('««). 

 corusca Wiedemann, Auss. Zw. I, 232, 7. — East Florida, 



Thereva tergissa Say, J. Acad. Phil. Ill, 39, 1 (Compl. Wr. II, 57). 

 *flavicincta Loew, Centur. IX, 70. — Northern Wisconsin River; 

 White Mts., N. H. 

 frontalis Say, Long's Exped. App. 370; Compl. Wr. I, 252; Wiede- 

 mann, Auss. Zw. I, 230, 2. — N. W. Territory (Say). 

 *gilvipes Loew, Centur. IX, 71. — Massachusetts. 

 *stri}?ipes Loew, Centur. IX, 72. — Lake Wiunipsg. 

 ruflcornis Macquart, Dipt. Exot. II, 1, 25, 8. — Carolina. 



*oomata Loew, Centur VIII, 9. — California. 



*fiicata Loew, Centur. X, 37. — California. 



*hirticeps Loew, Berl. Ent. Zool. 1874, 382. — San Francisco. 



*melanoneura Loew, Centur. X, 36. — California. 



*nielanophlel)a Loew, Zeitschr. f. Ges. Naturw. 1876, 317. — San 



Francisco. 

 *Yialis 0. Sacken, Western Dipt, 274. — Yosemite Valley, Calif. 



