Dec, 1904.] Tabanidae. 245 



brown, all the femora, apex of tibiae and anterior tarsi, black, 

 remainder of legs red. Length 17 millimeters. Specimens from 

 Mission Motmtains, Montana, received from Prof. M. J. Elrod, 

 and from Laggan, Alberta, collected by Prof. R. C. Osburn. 

 Wide!}' distributed in northern United States and Canada. 



Species not Idextified. 



Tabanus tetricus Marten. This is colored something like rhom- 

 bicus but with red antennae. Described in Canadian Entomol- 

 ogist XV, 111. 



Tabanus fuscipalpis Bigot. This description suggests T. 

 sequax. Blackish palpi are not found in many species of its 

 group. Mem. Soc. Zool. France V, 681. 



Tabanus hirtultis Bigot. I do not recognize this species. It 

 seems to be colored much like some of the darker specimens of 

 sonomensis. The antennae are black with a trace of red at the 

 base of the third regment, the subcallus is not denuded and the 

 anterior branch of the third vein bears a long stump. Mem. Soc. 

 Zool. Fr. V, 641. 



Tabanus maculifer Bigot. Agrees in many respects with 



phasnops but has the subcallus denuded. I have never seen a 



specimen of phaenops with this character. Mem. Soc. Zool. Fr. 

 V, 641. 



Tabanus villosulus Bigot. Must resemble the male of Apa- 

 tolestes comastes Will. Mem. Soc. Zool. Fr. V, 684. 



Diachlorus notatus Bigot. Suggests Silvius pollinosus and 

 quadrivittatus. There are some specimens of these species with 

 wings such as Bigot describes. Mem. Soc. Zool. Fr. V, 623. 



List, Synonymy and Bibliography of Species Treated in This Paper 



pangonia. 



dives Williston, Tr. Kan. Acad. Sci. X, 1.30. From California. 



californica Bigot, Mem. Soc. Zool. Fr. V, 618. From California, 

 fera Williston, Tr. Kan. Acad. Sci. X, 130. From Oregon, Washington 



and British Cokimbia. 

 hera Osten Sacken, West. Dipt. 214. From San Francisco, California, 

 incisa Wiedemann, Aviss. z^veiil. Ins. I, 90. From Ark. Col. N. M., 



Oklahoma. 

 incisnralis Say, Jr. Ac. Nat. Sci. IH, 31; Compl. Writ. 1,75. 

 ruficornis Bigot, Mem. Soc. Zool. Fr. V, 615. From California, 

 saussurei Bellardi, Sag. Ditt. Mes. I, 49. From southern Arizona and 



Mexico, 

 velutina Bigot, Mem. Soc. Zool. Fr. V. 615. From California. 



