173 TWO NEW SPECIES OF TABANUS FROM THE ANGLO-EGYPTIAN SUDAN.

By Ernest E. Austen.

{Published by permission of the Trustees of the British Museum.)

The types of the species described below have been presented to the British Museum (Natural History) by Mr. H. H. King, Government Entomologist, Auglo-Egyptian Sudan, by whom coloured figures of both species will shortly be published in the forthcoming Fourth Report of the Wellcome Tropical Research Laboratories, Khartoum.

Genus Tauanus, Linn.

Tabanus camelarius, sp. n.

1 Q.—Length, (5 (1 specimen) 12'.3 mm., Q (2 specimens) 11"6 to 12'8 ram. ; width of head, , 4'25 mm., Q 3"75 to just under 4 mm. ; width of front of Q at vertex 0'6 mm. ,• length of wing, ( 8*75 mm., Q 8"2o to 8"4 mm.

Somciohat narroiv-bodiod, elonc/alc species; dorsum of thorax mousc-f/rej/"' iii(, blackish slate-coloured in Q , and in both se.ves longitudinally striped with liyht grey, though less distinctly in cJ than in Q; dorsum of abdomen dark broum in ( , clovebroicn or blackish brown in Q , and in both sexes icith three longitudinal stripes, ichich are smoke grey in and whitish grey in Q ; one stripe is median and continuous ; midway between this and lateral margin on each side is a stripe, which is largely composed of disconnected, longitudinally elongate spots ; venter light grey, ivith a broad, blackish, longitudinal stripe, interrupted on hind margins of segments and in Q very conspicuous, in much less distinct and inconspicuous unless viewed from behind ; femora slate-grey, with a lohitish grey bloom, tibice partly cream-buff, front tarsi entirely black, middle and hind tarsi blackish brown, except proximal tioo-thirds offirst joints, ichich are cream-buff.

Head : frontal triangle in ( drab-grey, crossed by an ill-defined bi'ownish band on a level with and just below upper margin of lower third of eyes ; front in Q grey (drab-grey between base of antennse and frontal callus), clothed on upper half with minute black hairs ; face and jowls whitish grey in both sexes and clothed with white hair, in Q an indistinct dusky mark between base of antenna and eye on each side ; eyes in ( (dried specimen) with small facets (occupying lower third and posterior border) dark brown, and with the transversely fusiform area occupied by the large facets, which is divided medially by the junction of the eyes, drab above and on each side, and crossed horizontally by a curved, dark brown band, which does not reach the postero-lateral margins of the area, and below the admedian two-thirds of which the large facets are paler ; eyes in Q (dried specimen) with two narrow, dark bands across centre ; in Q , front moderately broad (inner margins of eyes almost parallel, converging very slightly * For names and illustrations of colours see Ridgway, " A Nomenclature of Colors for Naturalists " (Boston : Little, Brown & Company, 1886).