556 C. R. OSTEN SACKEN'S PRODROME 



Front rather narrow, yellowish brown, with a ridge-like line in the middle, whose very- 

 slight expansion below represents the very narrow, almost linear, frontal callosity, which 

 occupies less than one half of the breadth of the front ; antennae reddish ; third joint 

 rather broad, its upper corner angular, projecting ; its annulate portion rather long and 

 with very distinct divisions ; palpi rather narrow at the base of the second joint, yellowish 

 white, with short, black hairs ; face white with white hairs. Thoi^ax densely covered with 

 whitish pollen, and clothed with recumbent white haii's. Abdomen browTiish ; hind mar- 

 gins of the segments whitish pruinose, and beset with wliite hairs, forming a rather broad 

 border on each segment. Front coxa3 yellowish white, with white pile ; front femora, tips 

 of tibite and tarsi brown ; the basal three quarters of the tibiaj whitish, beset with white 

 pile ; the four posterior tibiaj likewise yellowish white, except their extreme tip, which is 

 infuscated ; posterior tarsi brownish, paler at the basis. Wings slightly grayish, unicol- 

 orous ; first posterior cell broadly open. 



Hah. Missouri (Say) ; Cumberland Gap, Ky. (George Dimmock) ; Georgia (H. K. Mor- 

 rison) ; Kansas (G. F. Gaumer). Three females. 



This singular species will be easily recognized, especially by the smallness of the frontal 

 callosity. On the vertex there is a distinct tubercle, and if this is the ocellar tubercle it 

 would be, to me at least, the first instance of its presence in a species with glabrous eyes. 



Tabanus endymion n. sp. 



Male. Thorax brown, whitish anterioi'ly, scutellum white ; abdomen chestnut brown, 

 the segments with broad white margins ; fork of third vein and crossveins at the base 

 of posterior cells (except the third), spotted with brown. Length, 15-10 mm. 



Face grayish white, with white hair ; palpi brown ; antennae reddish bro^vn, third joint 

 more reddish, with a projecting, angular upper corner. Eyes bare. Thorax of a rich, 

 pure brown behind, slightly grayish pollinose anteriorly, where some faint vestiges of 

 stripes are visible ; humeri whitish ; the ground color of the scutellum is concealed under a 

 thick white pollen and white pile ; between the scutellum and the root of the wing, on 

 each side, a fringe or tuft of snow-white hair ; pleurte and pectus grayish pollinose, with 

 white hairs ; a large tuft of dark brown hair forms a stripe beginning at the antealar callos- 

 ity and running across the pleura. Abdomen subconical, reddish brown, darker brown 

 posteriorly, with a blackish longitudinal stripe along the middle of the first three segments ; 

 posterior margin of segments two to four white ; on segments three and four the white is 

 slightly expanded, subtriangular, in the middle ; segment five has a narrow whitish border ; 

 on the venter, the corresponding segments are also bordered with white. Legs blackish 

 brown, beset with black hair, knees and base of tibiiB slightly reddish. Wings faintly 

 tinged with brownish, which tinge is more distinct behind the dark brown stigma ; the root 

 and the costal cell are brownish yellow ; a rounded brown spot on the bifurcation of the 

 third vein ; crossveins at the base of the second, fourth and fifth posterior cells distinctly, 

 that at the base of the first and third more faintly clouded ; first posterior cell with a 

 hardly perceptible coarctation. 



The head is comparatively small, for a male, not much broader than that of the female, 

 although distinctly more convex ; the area of the larger facets is distinctly limited below, 

 about the middle of the eye ; its limit is evanescent above towards a broad border of 

 smaller facets along the posterior orbit. 



