35i> 



which is almost entirely black and without the depressed yellowish 

 hairs except about the suture ; the greyish stripes disappear ; pubescence 

 on the pleurae more abundant and blackish, but the tufts on the 

 postero-upper margins of the meso- and meta-pleurae somewhat yellow- 

 ish ; scutellum brownish like the thorax with rather thick brownish 

 black pubescence ail over. 



Wings, squamae, and halteres as in the female, but the first 

 ones quite clear with tiie veins pale brown, and middle ones with the 

 yellowish tuft about the angle. 



Legs as in the female, but the fore tibiae only yellowish white 

 on the basal third ; the pubescence longer and denser. 



Abdomen longish, and flat conical. Dorsum without the greyish 

 tomentose bands, but on the fourth and fifth segments there are not 

 very conspicuous silvery white haired bands along the posterior bord- 

 ers, these two bands extending in the middle as a short much smaller 

 triangle of which the posterior one is not reaching the sides, the 

 resting pubescence black excepting on the posterior margins of the 

 nearly lateral thirds of the first three segments yellowish brown, and 

 more denser and longer (but still short) than in the female. Ventre 

 much black more than in the female, slightly covered with a greyish 

 tomentum, bearing black pubescence and on the very narrow posterior 

 margins of the second, third and fourth segments there are some short 

 white hairs excepting of the middle part especially on the fourth ; 

 seventh segment about the middle with rather long erect black bristly 

 hairs which do not extend up to the preceding segments. 



Length: 18-18.5 mm. 



This species is one of the handsomest flies, and has no ally in 

 the Paraearctic or Oriental region, but it has a general resemblance to 

 the Malayan Tabanus significans, Ricardo. T. niiyajima may be dis- 

 tinguished in both sexes from any other of our species, by the only 

 two fiat silvery white haired median triangles. It has been described 

 from a male taken Miss Pascoe in Japan, 1896, and a series f the 



