264 



which is rounded. Dorsum strongly convex, blackish, very slightly- 

 shining, with five distinct yellowish white bands, as the hind border of 

 each segment (except the basal and terminal segments) conspicuously 

 and rather broadly dusted with ashy grey and covered with pale yel- 

 low pubescence ; each of these bands being narrower than the preceding 

 one, and first three bands triangularly swollen anteriorly in the middle, 

 as if one may sometimes say that the abdomen has a series of the 

 median triangles ; the first segment on the whole sides covered with 

 an ashy grey tomentum and whitish pubescence, and the median 

 posterior margin obscurely dusted with yellowish brown, and on its 

 median incised portion bearing yellow pubescence ; the second segment 

 with the extreme sides ashy grey and covered with white pubescence 

 on there; the sides of two following segments more or less brownish, 

 and bearing depressed yellowish pubescence with long erect stout black 

 hairs intermixed ; the sides of the fifth and sixth segments covered 

 with long erect black hairs, but the extreme margins more or less 

 reddish brownish ; the terminal segment wholly blackish and covered 

 with numerous long erect black pubescence ; the pubescence on the 

 rest long and sloping, black. Ventre moderately convex, blackish, 

 covered with an ashy grey tomentum and a short white pubescence ; 

 the seventh segment not obscured by greyish dust but with brownish 

 one and covered with numerous long and stout erect black bristly 

 hairs, and two preceding segments more or less furnished with 

 long stout sloping black hairs about the basal half especially on the 

 sixth segment. 



Length: 12-13.5 rnm. 



This species is closely allied to Tabanus iyoensis, but easily 

 distinguished from the latter, by its larger size, by the much broader 

 yellowish pubescent abdominal bands, by the yellowish haired scutellum, 

 by the more produced dorsal hump of the antennae, by the more 

 yellow pubescent dorsal thorax with five very faint stripes, by the 

 white pubescence on the front femora, by the median series of three 



