GERTRUDE RICARDO. DIPTEREN IL 397 



16. Tabanus récusons Walker. 



Proc. Linn. Soc. London, III, p. 83 (1859). 



Type a female from Aru Islands in Brit. Mus. Coll. A female in Dr. Lorentz's Coll. from 

 Lorentz River, New Guinea. 



This species is allied to Tabanus obscuratus Wlk., from Ceram, but distinguished from 

 it by the grey tomentum on basai segments of abdomen. From Tabanus doreicus Wlk., from 

 New Guinea it is distinguished by the dull reddish or yellowish base of fore tibiae and by 

 the bluish grey tomentum on abdomen. 



A blackish species, the bluish grey tomentum at base of abdomen very distinct. 

 Antennae red. Legs blackish with some red colour. Wings brownish. Length (type) 17 m. m., 

 the other female i6'/ 2 m. m. 



Face covered with greyish tomentum which is more yellowish on the cheeks, pubes- 

 cence on face brown. Palpi reddish with black pubescence, stout at base ending in a point. 

 Beard brownish. Forehead same colour as face, narrow, nearly ten times as long as it is 

 broad anteriorly, where it is more than a third narrower than at vertex. Antennae reddish, 

 the first two joints with black pubescence, the third with a distinct tooth, duskier at apex. 

 Thorax blackish, covered with grey tomentum, shoulders red, breast grey with blackish hairs. 

 Scutellum blackish, red on posterior border, covered with greyish tomentum. Abdomen narrow, 

 blackish, the segmentations indicated by rim of paler colour, the plum like bloom at base 

 extends over the first two segments and on the underside of thèse segments. Legs blackish 

 in the type, the tibiae are largely reddish, in the fore pair only at the base, in the other 

 female this colour is much more obscure, pubescence of legs black. Wings brownish, paler 

 at apex and on posterior border, with a pale streak between the first and second longitudinal veins. 



17. Tabanus denticidatus n. sp. 



Type female and others from Mounts Hellwig and Mounts Wichmann. 



A large broad bodied reddish brown species distinguished by the very large long 

 tooth to third joint of antennae. Length 19 — 20 m. m. 



Face pale reddish covered with grey tomentum and with some short black hairs. 

 Palpi large, red, stout at base, ending in a long point, with black pubescence. Beard brown. 

 Antennae dull reddish, the first two joints with black pubescence, the third with the long 

 slender tooth as long as the first division, the last divisions blackish. Forehead narrow, the 

 same colour as face, about eight times as long as it is wide anteriorly, where it is a third 

 narrower than at vertex. Frontal callus red, shining, oblong and narrow with a long raised thick 

 extension. Thorax and abdomen reddish brown, the former with some grey tomentum and 

 very scanty black pubescence on dorsum, which is almost bare, sides with black hairs, a 

 tuft of yellow hairs at base of wing and a smaller one beyond ; sides and breast with grey 

 tomentum. Scutellum same as thorax. Abdomen shining bare, finely punctuated with a very 

 few black hairs, sides with fringe like black hairs on the first four segments, and on posterior 

 border of last segment, on the fifth and sixth the hairs are light orange; underside the 



