Described from a single female, from Kotosho, July 20th., 191 2, 

 Formosa, in fairly good condition. The female, which bit the neck, 

 has been took by the anther, about four o'clock afternoon, and her 

 biting was rather severe but its effect last with him only two days. 



The small-sized Tabanus with greyish black body, is easily 

 distinguished from other species of this genus by the almost uniformly 

 coloured and rather short abdomen, by the blackish legs, and by the 

 very long wings." 



2. Tabanus arisanus, Shir. (n. s P .) (PI. IV, fig. 6; PI. X. fig. 3) 



(Hoso-Abii) 



Rather small and slender species, brownish ; frontal stripe with 

 two separated callosities, about four times as long as it is broad ; 

 abdomen yellowish brown with pale central stripe and hind margins. 



Female. Head a little broader than the thorax, very slightly 

 arched. Frontal stripe broad, slightly divergent above, with the straight 

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

 little more than three times as long as its broadest part, clothed with 

 a yellowish brown tomentum which is slightly darker at the upper 

 half, and with a few sloping black pubescence which is rather abundant 

 just above the second callus and is intermixed with a very few tiny 

 yellow hairs ; frontal calli blackish, the first one somewhat quadrate 

 (not transverse), shining reddish black, hardly touching the eye-margins, 

 the second callus blackish, very narrow, elongate, like a line, very 

 slighdy elevated and about as long as the lonwer one. Frontal triangle 

 somewhat inflated, with a fine distinct median sulcus through the whole 

 length, clothed with a dull orange yellow tomentum and without pu- 

 bescence ; two conspicuous but shallow rather large crescent shaped de- 

 pressions just above the antennal pits. Face clothed with a greyish 

 tomentum, which is somewhat yellowish at the epistoma and is dull 

 orange yellow at the upper part of the cheeks ; the epistoma mode- 

 rately inflated, a little shorter than the widh. with distinct side-edges 



