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



sepia-coloured, with pale markings as shown in fig. 1 ; front and hind legs clove- 

 brown, middle legs dark brown (middle femora mouse-grey proximally, and with a 

 broad, greyish, cream-buff band before distal extremity), front tibiae banded like hind 

 tibiae, middle tibiae each with a pair of cream-buff or cream-coloured bands, varying 

 in depth in different individuals, and sometimes occupying greater part of joint. 



Head : basi-occipital region, jowls, and lower part of face light grey, clothed 

 with whitish hair, sides of face often with brownish hair in front ; occiput 

 smoke grey ; front relatively rather narrow at vertex, somewhat broader 

 anteriorly, vertex bearing a large, deltoid or cordate, dark sepia-coloured median 

 spot, often narrowly divided in middle line ; median frontal spot if present small 

 and inconspicuous, in contact with anterior extremity of spot on vertex, lateral 

 frontal spots more or less oval, narrowly separated from or in contact with eyes ; 

 frontal callus roughly semi-oval in shape, its curved upper margin produced in 

 middle line into a small, upwardly directed angle, its straight lower margin with 

 median portion, i.e., part between antennae, descending somewhat lower than 

 remainder, so that lower edge of callus is slightly excavated above each antenna, 

 each lateral extremity of callus separated from eye on that side only by an 

 exceedingly narrow pollinose line ; as in H. bvllatifrons, Austen, and also in 

 following species, a large clove-brown or black spot below and in contact with 

 lower inner angle of each eye, a smaller median quadrate spot of similar colour 

 between and above bases of antennae, in contact with median downward pro- 

 longation of lower edge of callu3, and below and between antennae, only 

 narrowly separated from or in some specimens apparently fused with median 

 clove-brown or black spot just mentioned, a similarly coloured, transversely 

 elongate spot ; palpi drab-grey or smoke-grey, clothed with glistening whitish or 

 yellowish-white hair, distal portion of terminal joint more or less dark brown on 

 outer side and clothed with minute blackish hairs, some blackish hairs also 

 present on proximal portion of same joint, terminal joint elongate, but little or 

 only moderately expanded at base ; first joint of antennae either shining raw- 

 umber-coloured, except upper surface of distal extremity, which is shining dark 

 brown, or shining dark brown, except inner surface of proximal three-fourths, 

 which is shining raw-umber-coloured ; first joint of antennae, which is clothed 

 with minute black hairs, elongate (longer than in either H. bullatifrons or the 

 following species), and roughly cylindrical-ovate in outline, its distal two-thirds 

 being moderately swollen, second and third joints dark brown (annulate portion 

 of third joint clove-brown), third joint viewed from side narrow and elongate, its 

 proximal portion but little wider at base. Thorax : anterior portion of dorsum 

 with a pair of narrow, longitudinal, grey stripes, commencing on front border 

 and terminating in or more or less indistinctly connected with a pair of grey 

 sagittate spots, situate just behind inner extremities of lateral halves of trans- 

 verse suture, lateral margins of dorsum and usual pair of bluntly crescentic 

 marks on hind margin of main portion also grey ; dorsum (including scutellum) 

 thinly clothed with short, pale yellowish hair, which on main portion of dorsum 

 is mixed with minute blackish hairs ; pleurae and pectus light smoke-grey, 

 clothed with whitish hair, mesopleurae with upper margins and a large blotch at 

 lower extremity, sending out an offshoot on to sternopleurae, sepia-coloured. 

 Abdomen ; extreme base of tergite of second segment in most cases narrowly 



