236 The Ohio Naturalist. [Vol. V, No. 2, 



Tabanus cribellum Osten Sacken. 1 have seen Townsend's 

 types of guttatulus in Kansas University collection, and have 

 compared with Osten Sacken's figure of cribellum. It is my 

 opinion that the two are synonyms and as the latter name is the 

 older it would stand for the species. 



The eyes are naked, the antennae reddish with the annulate 

 portion of the third segment black and about the length of the 

 basal. Wings hyaline, abdomen gray with four brown markings 

 on each segment. These markings may be united in varying 

 ways. Length about 10 millimeters. 



Specimens from Mesilla Park, N. M., taken by T. D. A. Cock- 

 erell. As I understand it, Osten Sacken's types were taken in 

 northern Mexico, only a few miles from where Townsend procured 

 his specimens. 



Tabanus dodgei Whitne3^ There are two conspicuous white 

 stripes on the thorax separated by a wider dark brown stripe, 

 which in most specimens is divided for the anterior half of its 

 length b}^ a very narrow white line. Exterior to the white stripe 

 on each side is a dark stripe followed by gray on the pleura. 

 The abdomen is marked by a rather narrow dark brown stripe on 

 the median line, followed by a gray stripe of about equal width 

 on either side, and these followed by obscure brownish on the 

 outer margins. First two segments of antennae red, third black 

 with basal prominence rounded. The male is colored like the 

 female in all details. The head in both sexes is rather small and. 

 flattened so that the longitudinal diameter is shorter than in most 

 other species of its size. Length 14 to 16 millimeters. 



It is a very distinct species and cannot be confused with any 

 others of our fauna. A number of specimens taken at Onaga, 

 Kansas, by F. F. Crevecoeur, who has sent me much interesting 

 material. 



Tabanus epistatus Osten Sacken. This species averages much 

 smaller than affinis, bijt small sized specimens of the latter are 

 much like the larger ones of epistatus. A good character for 

 separating the two species may be seen in the palpi. In affinis 

 these are long and slender while in the latter they are lobust. 

 The antennae are usually red with the annulate portion of the 

 third segment black. However, there is some variation but in 

 all the specimens I have studied the base of the third segment is 

 invariably red. The subcallus is often denuded; length 13 to 17 

 millimeters. 



The larger specimens, which I cannot separate from the others 

 by any constant character, agree in detail with Marten's descrip- 

 tion of californicus. Therefore I am of the opinion that the 

 latter should be considered a synonym. 



Tabanus flavidus n. sp. Female: Length 12 to 14 millimeters. 

 Eyes naked, antenna red with annulate portion of the third seg- 



