392 GERTRUDE RICARDO. DIPTEREN II. 



colour. Hind part of head with black hairs. Tliorax blackish brown, with two very narrow 

 ashy grey indistinct stripes ending at the suture in large irregular grey spots, to which latéral 

 bands from side of thorax are joined, posterior border of thorax with a band of grey tomentum 

 covered with yellowish or white hairs, pubescence on dorsum otherwise black, and short, 

 sides of thorax yellowish, above base of wings with yellow hairs, breast covered with grey 

 tomentum. Abdomen blackish brown, in some spécimens reddish brown at the base, a small 

 médian grey tomentose spot covered with silvery white hairs is présent on each segment, 

 and a similar spot on the extrême latéral border of each segment, pubescence of dorsum 

 otherwise black; underside coverered with grey tomentum through which the dark ground 

 colour appears, segmentations with short yellow hairs. Legs reddish, the tarsi darker, pubes- 

 cence on femora yellowish, elsewhere black. Wings clear, veins brown, stigma yellowish brown. 



7. Tabanus divisus Ç n. sp. 



Type and a long séries of females from Rivierkamp, Lorentz River, Regen Island, Bivak Island. 

 (Dr. Lorentz leg.) Etna Bay, Digul River (Dr. Koch leg.). 



This species is very nearly allied to Tabanus cohaerens Walker. I should hâve hesitated 

 to distinguish it as a new species but for the long séries of spécimens ail of which exhibit 

 the same différences which appear strong enough to divide it off from the WALKER species. 



A small species with a darker abdomen on which small indistinct white spots appear, 

 not forming a continuous stripe. Forehead barely half as wide anteriorly as it is at vertex. 

 Length 12 — 13 m. m. 



Palpi yellowish, sometimes darker, densely covered with grey tomentum, pubescence 

 black, stout at base ending in a rather longer point than the WALKER species. Forehead 

 about ten times as long as it is wide anteriorly, almost double as broad at the vertex as it 

 is anteriorly. Frontal callus very narrow, nearly touching the eyes, blackish brown with a 

 long lineal extension. Tliorax and scutellum darker brown. Abdomen narrow, brownish, the 

 same colour throughout, in some spécimens faintly reddish at extrême base; the small white 

 haired spots are usually présent from the second to the fifth segment, and as a rule do not 

 form a continuous médian stripe; underside with distinct white haired segmentations. Legs 

 as in Tabanus cohaerens. Wings very similar, rather darker on the foreborder. 



S. Tabanus seiuicircularis n. sp. 



Type (female) and another in Brit. Mus. Coll. from Madew, St. Joseph River, British New 

 Guinea, 2000 — 3000 ft. (AV. Stalker) 1909. 



A dark brown médium sized species with four large white tomentose semicircular spots 

 on the abdomen. Palpi pale yellow. Antennae black. Forehead rather broad. Length i3'/ 2 m.m. 



Face covered with whitish tomentum, yellowish on the upper part of cheeks and on 

 subcallus, pubescence on face white. Palpi pale yellow covered with black pubescence, a little 

 stout at base ending in a long point. Beard white. Antennae black, the first two joints with 

 black hairs, the third joint with a distinct tooth. Forehead nearly parallel about five times as 

 long as it is broad, covered with dark yellowish tomentum with a patch of blackish hairs 

 towards the vertex, frontal callus club shaped dark brown, shilling, touching eyes with a short 



