851 



25. Tabanus miyajima, Ricardo. (PI. VIII, fig. i). 



(Shiroashi-Abn or Shiro-snne-Abu) 



Rec. Ind. Mus., IV, p. 250, 1911. 



Tabanus albotibialis, Matsumura, Thous. Ins. Japan, Addit., vol. II, p. 



382, PI, XXII, fig. 11, 1916. 



A blackish medium -sized species with distinctly whitish tibiae ; 

 in the female with whitish-haired abdominal bands, most prominent on 

 the fourth and fifth segments where they are produced in the middle 

 as triangular spots, with a rather large blackish callus on rather 'broad 

 whilish or yellowish grey frontal stripe, and with faint greyish stripes 

 on the greyish black thorax ; in the male with brownish black thorax 

 without any stripes, with only two conspicuous white-haired abdominal 

 bands, and with quite clear wings. 



Female. Head slightly broader than the thorax, and very 

 slightly arched behind. Frontal stripes whitish or yellowish grey, 

 not parallel-sided but contracting towards the inner and upper angles 

 of the eyes, and about the part between the vertex and prolongation 

 of the frontal callus broadest, moderately broad and wholly five times 

 as long as its narrowest part or about three and a four-fifth times as 

 long as its broadest part ; pubescence on the frontal stripe moderately 

 long and conspicuous, mainly blackish brown but on the lower half 

 yellowish white ; frontal callus brownish black, moderately convex, 

 club-shaped, long, stout, not reaching the eye-margins, prolonged in a 

 stout short linear extension ; vertex blackish, covered with inconspicu- 

 ous short blackish pubescence, and with an inconspicuous trace of the 

 ocelligerous tubercle. Frontal triangle covered with yellowish grey or 

 pale yellowish brown tomentum which becomes suddenly brownish 

 on the lunules just above the antennal fossae, in the middle there is 

 a distinct but fine longitudinal sulcus through the whole length. Face 

 covered with greyish tomentum and with some silvery white pubes- 



