302 



Ricardo, Rec. Ind. Mus., IV, p. 170, 191 1. 



Shiroki, Tokubetsu-Hokoku, Exp. St. Govern, of Formosa, VIII 



p. 282, 1913. 

 Matsumura, Thous, Ins. Japan, II, p. J2, pi. XXII, fig. 3, 1905 



&wmm&mmf?w%$Lm (mmm f&-*s> & vi, &. 3 



1914. 



? Tabanus yokoamcnsis. Bigot, Mem. Soc. Zool. France. V, p. 678 

 1892. 



A blackish medium-sized species with an oblong blackish frontal 

 callus which has a darker linear extension on the moderately narrow 

 frontal stripe, with five distinct grey stripes on the thorax, with three 

 grey spots on the first two or three segments only, and with the con- 

 spicuously pale tibiae. 



Femak. Head slightly broader . than the thorax, rather short, 

 and moderately arched. Frontal stripe narrow, very slightly contract- 

 ing from the vertex to the eye-angles, and wholly six times as long 

 as its narrowest part or wholly five times as long as its broadest part, 

 with two somewhat distinct longitudinally oblique sulci from about the 

 middle of the eyemargins to below the vertex, not connecting with 

 one another at the upper ends, clothed with pale yellowish white 

 tomentum which has a light shimmer (when seen from above) 

 and is brown (when viewed from below), and which is yellowish 

 about the lower half (when seen from front) ; pubescence on 

 the frontal stripe sloping, pale yellowish white, with some similar but 

 blackish hairs intermixed on more than the upper half, which become 

 much numerous on the vertex, while the pale hairs are nearly 

 disappeared there ; frontal callus slightly elevated, reddish black or 

 black, oblong, not reaching the eye-margins and hardly touching the 

 frontal triangle, with a long linear extension which is more convex 

 than the callus proper and is about twice or three times as long as the 

 broadest portion, and with a very fine somewhat distinct longitudinal 

 median sulcus ; frontal triangle moderate in size, slightly convex, pale 



