330 



sloping blackish hairs intermixed about the middle, while the second 

 segment near the front margin bears long and erect but fine rather incon- 

 spicuous greyer hairs which do not extend below to the following 

 segments. 



Length: 14.3-15 mm. 



This species is easily distinguished from T. amacniis by its colour 

 of the thorax and abdomen, by its broad frontal stripe containing a 

 rather broader and shorter callus, by its browder and more conspicuous 

 grey stripe on the thorax, by its ashy grey triangles on the abdomen, 

 by the closed or open (but very narrowly) first posterior cell of the 

 wing, and by its whitish pubescence on the thorax. 



1 . takasagoensis may be uncommon in Japan, as I have records 

 only from Takasago (July 31st), Kumamoto (July 3rd), Kagoshima 

 (July 29th) and lyo (July 2 1st) ; and the male is not known to me 

 yet. I collected a single female, which was biting a horse on the 

 country road from a village to the town of Hitoyoshi in July. There 

 is no other records of the habits of this fly. 



21. Tabanns crassus, Walker. (PI. VII, fig. 5). 



(Koslii-shiro-Ahu). 



Dipt. Saund., I, p. 50, 1850. 



V. D. Wulp, Cat. Dipt. South Asia, p. 60, 1896. 

 Kertesz, Cat, Dipt., Ill, p. 237, 1908. 



Ricardo, Rec. Ind. Mus., IV, p. 189, 191-1 ; Ann. Hist.-Nat. 

 Mus. Nat. Hung., XI, p. 170, 191 3. 



A dark brown medium-sized species with two basal dorsal seg- 

 ments of the abdomen whitish. 



Male. Head rather small, about as wide as the thorax. Front- 

 al triangle flat, slightly prolonged up between the eyes, covered 'with 



