41S 



as a specific one until [can compare .them, because there is no specimens 

 bearing no pubescence on the basal joints of the antennae, and bearing 

 the quite rounded frontal callus, in the good number of this species 

 collected from many localities in Japan. 



T. ckrysurits is a rather widely distributed Japanese horse-fly, as 

 I have records from Matsuyama, Kioto, Yamato, Towada. Shirakawa,, 

 Onuma, and Sapporo, but there is no doubt that this fly is rather a 

 northern species occuring abundantly in Hokkaido, the dates ranging 

 from July 15th to September 1 8th. in August its appearance being 

 most numerous. 



The female flies are usually feeding on the blood of cattle but 

 not uncommon on horses, and it is believed by many veterinary sur- 

 geons, after the several and careful studies in the Isano Experimental 

 Station from 1910 to 191 3, that one of transmitters of a certain infectious 

 anoemia of horses is this large species. The females also sometimes bite 

 human beings and the effect usually is more severe than that of any other 

 our species. 



32. Tabanus pallidcpectoratus, Bigot. 



Atylotus pallidepectoratus, Bigot, Mem. Soc. Zool. France, V, p. 658, 



1892. 

 Tabanus pallidepectoratus, V. d. Wuip, Cat. Dipt. South Asia, p. 63, 



1896. 

 : Kertesz, Cat. Dipt., Ill, p. 267, 1908. 



Ricardo, Red. Ind. Mus., IV, p. 209, 1911; Ann. Nat.— Hist. 

 Mus. Nat. Hung., XI, p. 172, 191 3. 



A robust reddish yellow species, with a very narrow frontal 

 stripe and frontal callus, reddish antennae, yellow palpi, black legs, only 

 the tibiae whitish at the base, and clear wings tinged yellowish brown. 



Length 22 mm. 



Female. Face covered with greyish tomentum which becomes 

 yellowish brown on the upper parts of cheeks, on subcallus and fore- 



