TABANID^ OF OHIO* 



TABANus cAROLiNENsis Macquart. 



Length 12-15 mm. Eyes pilose ; a small ocelligerous tubercle pre- 

 sent, palpi pale, antenna reddish, annulate portion of the third seg- 

 ment black or in some specimens the black of the antenna is more 

 extensive, including a large part of the third segment and the superior 

 angles of the first and second segments. Thorax black with obsolete 

 gray stripes, thinly gray pollinose, and clothed, especially on the sides, 

 with gray pile; wings hyaline with base and costal cells pale yellowish, 

 veins brown; legs reddish brown, tarsi and apices of all the tibiae 

 darker; abdomen above brown, lighter colored on the sides, each segment 

 with a gray hind margin which expands into a small 'triangle at the 

 middle. 



Female: Subcallus denuded, shining brown or blackish, communi-- 

 eating with the frontal callosity which is rather small and separated 

 from a linear denuded spot above it by a pollinose interval ; vertex in 

 the region of the ocelligerous tubercle denuded, shining brown. Eyes 

 pilose, but this is rather difficult to see if not aided by a strong lense. 



Male: Subcallus not denuded; eyes plainly but short pilose; head 

 not noticeably larger than in the female. 



Habitat : Ironton, Cincinnati, Newark and Medina. 



The abdominal markings are variable and therefore hard to 

 describe. The change from reddish to black is very often so grad- 

 ual that it is hard to say where the one color ends and the other 

 begins. The gray posterior margins of the segments are very 

 narrow, and the middorsal row of triangles very small. The de- 

 nuded subcallus of the female in conjunction with the hyaline 

 wings is sufficient to separate it from related Ohio species. It is 

 •close to rhombicus of the western states. 



TABANUS CERASTES OstCU SackcU. 



Length 14-16 mm. Eyes pilose, palpi pale, first two segments of the 

 antenna reddish with black hairs ; third segment with a very prominent 

 basal process, apex of this process and annulate portion black, remainder 

 reddish; thorax brown with five rather prominent gray stripes, scutellum 

 uniform brown ; the vestiture of the thorax and scutellum give a grayish 

 appearance; wings hyaline, veins brown and costal cell smoky; legs 

 brownish with the tarsi and apical part of all the tibiae darker. Abdomen 

 above dark brown, with a middorsal row of gray triangles, a row of 

 prominent gray spots on each side, and gray posterior margin on each 

 segment. 



Female: Frontal callosity shining brown and nearly square, as- 

 wide as the front, and with an elongate denuded spot above it; sides o£ 

 the front parallel. . ^ - 1, , 



Male : Head noticeably larger than in the female, but, the color- 

 ation does not dififer from that sex. 



Habitat : Hanging Rock, on the Ohio River, May 29, rest- 

 ing on foliage. , , , \r:, ' >•;>,. 



This species is very much like some others \vith pilose eyes, 

 but both sexes are readily distinguished by , the very prominent 

 basal process on the third segment of the antenna. 



