﻿ERNEST E. AUSTEN — NEW AFRICAN TABANIDAE — PART III. 409 



Head : upper portion of front with a dark sepia-coloured, V-shaped, median 

 mark, extending from vertex to median frontal spot, with which its apex is in 

 contact ; in front of this is a less distinct, brownish, sinuous, transverse mark, 

 shaped something like a flattened O, with extremities expanded into rounded 

 spots and narrowly separated from the eyes ; median frontal spot small and 

 inconspicuous, lateral frontal spots large, not in contact with eyes, ovate but with 

 their anterior margins excavated ; frontal callus shining dark brown, semi-oval, 

 its upper margin curved, its lower margin produced downwards in centre as in 

 H. bullatifrons and foregoing species, its outer extremity on each side terminating 

 at a point rather beyond half way between level of outer edge of proximal joint 

 of antenna and inner margin of eye ; clove-brown or black spots, on level with 

 antennae, as in foregoing species or H. bullatifrons ; palpi smoke-grey, clothed 

 with whitish hair, terminal joint fairly large, moderately expanded at base, its 

 distal extremity on outer side darker and clothed with minute black hairs as well 

 as occasionally with some whitish hairs ; antennae as in H. bullatifrons. Thorax : 

 grey markings on main portion of dorsum resembling those exhibited by 

 H. bullatifrons but less fully developed, the admedian stripes being more or less 

 interrupted beyond the transverse suture, while the forwardly directed prolonga- 

 tions from the outer ends of the crescentic marks on the hind margin are only 

 faintly indicated, and the median stripe is broadly interrupted on a level with 

 the transverse suture, and is again but sometimes less distinctly interrupted 

 before reaching the hind margin ; hairy covering of dorsum as in foregoing 

 species ; pleurae and pectus light grey and clothed with whitish hair. Abdomen 

 agreeing generally with that of H. bullatifrons ; tergite of second segment with 

 its grey hind border sometimes produced into a large, median, forwardly directed 

 triangle, apex of which rests on hind margin of previous tergite ; four following 

 tergites each with (at least a vestige of) a grey, median, longitudinal stripe, 

 which in case of sixth tergite is incomplete, and, commencing on front margin, 

 does not extend beyond middle of segment ; tergites of last three segments each 

 with a pair of elongate, grey, admedian spots, resting on front margin ; lateral 

 extremities of first three tergites light grey ; dorsum clothed with blackish hair, 

 except hind borders and sides of segments, which are clothed with whitish hair ; 

 venter light grey and clothed with minute, appressed, yellowish hairs, except last 

 segment and a large, median blotch (resting on front margin but not quite 

 reaching hind border) on each of the two preceding segments, which are clove- 

 brown and clothed, at least for most part, with black or blackish hair. Wings : 

 stigma dark brown, decidedly shorter than in case of H. grahami ; median 

 rosette broken up into dots, as in latter species. Squamae light sepia-coloured. 

 Halteres : knobs cream-coloured, brownish fawn-coloured at base above, stalks 

 cream-buff. Legs : proximal two-thirds or rather more than proximal half of 

 first joint of hind tarsi buff. 



Nyasaland Protectorate : type from Mpenya, Central Angoniland, 

 1. ii. 1910 {Dr. J. B. Davey) ; a second example from Fort Johnston, South 

 Nyasa, 2,000 ft., 24. iii. 1910 {Dr. A.H.H. Barclay) : both specimens presented 

 to the British Museum (Natural History) by the Entomological Research 

 Committee. 



27226 E 2 



