295 



17. Tabanus sapporoenns, Shir. (n. sp.) (PI. VII, fig. 



3 ; PI. XI, figs. 5 & 6). 



(0-Aka-Abn, or Aka-Abu). 



Tabanus rufidens (Bigot) Matsumura, Thous. Ins. Japan, II, p. 



70, P i. xxii, fig. i, i9<>5;:fcH#gS*tr,&IB, P. 7^ 



pi. X, fig. 13, 1914. 



Rather large blackish grey species, with the densely golden- 

 yellow haired abdomen which more or less bears some black or brownish 

 black pubescence on the median part of each dorsal and ventral seg- 

 ments respectly, with the broad parallel- sided frontal stripe and the 

 large castaneous black frontal callus, with the large pointed tooth of the 

 third antennal joint, with the yellowish wings and with the blackish 

 brown legs excepting of all the tibiae dirty yellow. 



Female. Head as wide as the thorax and about a half as long 

 as that. Frontal stripe greyish yellow, slightly darkened above, broad, 

 parallel-sided, about three and a four-fifth times as long as it is broad, 

 covered with numerous but not dense short sloping black pubescence 

 which does not extend below, and on the lower thirds there are some 

 very fine pale inconspicuous hairs ; frontal callus shining castaneous 

 but about the margin blackish, quite separated from the eye-margin, 

 somewhat rounded, with a rather broad linear black upper extension 

 which extends beyond the middle of the whole length of the frontal 

 stripe ; vertex slightly darker but obscured by a grey tomentum, with 

 the very inconspicuous traces of the ocelli and bearing dense short 

 rather depressed black pubescence, behind which is some still short 

 outstanding blackish hairs. Frontal triangle broad and short, rather 

 flat, covered with a pale yellowish grey tomentum but there is an 



irregular transverse narrow distinct blackish spot on each side of the 







upper margin, with the rather broad orange yellow tomentose double 

 lunules just above the antennal sockets, and with a fine though distinct 

 median sulcus which does not reach the base of the frontal callus. 

 Face moderately convex, covered with a greyish yellow tomentum ; 

 epistoma very slightly tinged with pale brownish grey about the upper 



