240 



species in any countries where ft occurs, and most certainly in Formosa. 

 The economic side of this fly is not known yet, and the male is un- 

 known to us. 



8. Tabanus bicinctus, Ricardo. (PL V, fig. 3). 



(Fnta-shiro-obi-Abu) 

 Rec Ind. Mus. IV, p. 132, pi. XIII, fig. 5, 191 1; Suppl. Ent. Ill, 

 p. 64, 1914. 



A small handsome black species with a broad ashy grey band 

 occupied the anterior half of the thorax, white-haired scuteUum and 

 postalar calli, and white-haired bands on the third and fourth segments, 

 whitish tibiae, wings tinged brown on the fore border, and two-separat- 

 ed black frontal calli. 



Female. Head much broader than the thorax, rather short 

 and slightly arched. Frontal stripe black, obscured by dark yellowish 

 brown tomentum which becomes ashy grey about the intervals between 

 the two frontal calli and between the frontal triangle and lower 

 frontal callus, narrow, distinctly contracting from the vertex to the 

 frontal eye-angles, and wholly seven times as long as its narrowest 

 part or wholly five times as long as its broadest part ; pubescence on 

 the frontal stripe rather conspicuous black, directed upwards on the 

 upper part, while at the lateral margin about the middle part the 

 pubescence is similarly coloured but slightly shorter and sloping below, 

 which becomes inconspicuous and white on the whitish part except 

 on the portion just above the subcallus ; lower frontal callus shining 

 black, irregularly square, slightly longer than the width, separated from 

 the subcallus by a narrow ashy grey interval, slightly convex, with a 

 median longitudinal furrow, almost reaching the eyes ; upper frontul 

 callus black but not very shining, oblong, narrow, and about half as 

 wide as the lower callus, furrowed in the middle ; frontal triangle pro- 

 minent, almost wholly occupied by the dark brown shining subcallus 

 leaving a very narrow yellowish grey tomentose double crescent just 



