234 



'onger than that on the disc, and extreme sides of the second segment 

 whitish and covered with white pubescence and above this part long 

 black lateral tufts exist. Ventre less shining, the same with the ex- 

 ception of the first two segments which are wholly covered with 

 whitish grey tomentum and white pubescence, and of the seventh 

 segment which bears long erect black bristles which slightly extend 

 up to the fifth segment along the middle line. 



Length : 11-12 mm. 



This small handsome species is easily distinguished from 

 Tabanus bieiyictus, and the other allied species, by the v%ry thick white 

 pubescent tibiae, by the heavy fringe of black hairs on the femora, 

 and by the five white pubescent bands on the dorsal abdomen. 



T. qmnquainctus is only found in the mountaino.is districts of 

 Formosa, as I have records from Kosempo (May), Arisan (October), 

 and Suisharin (May), and it seems a rather rare species. 



According to the late Mr. I. Nitobe, the female is a blood- 

 sucker, attacking the skin of human beings, but the effect of her 

 piercing is not known. The male is still unknown. 



7. Tabanus sexcinctus, Ricardo. (PI. V, fig. 2). 



(Mii-Shiro-obi-Alm) 

 Rec. Ind. Mus., IV, p. 133, 191 1 ; Ann. Hist. Nat. Mus. Nat. Hung., 

 XI, p. 168, 1913. 



Small dull blackish species with white bands on the segmentations 

 except the first segment, with white pubescence almost all over the 

 underside of the body, with more or less distinct oceiligerous tubercle, 

 and with whitish tibiae. 



Female. Head very short but broader than the thorax, slight- 

 ly arched. Frontal stripe broad, slightly contracting from the vertex 

 to the front eye-angles, about three times as long as its broadest part 

 or about four and a half times as long as its narrowest part, covered 

 with yellowish grey tomentum which becomes a little brownish round 



