﻿ERNEST E. AUSTEN — NEW AFRICAN TABANIDAE — PART III. 403 



minute, appressed, glistening, pale yellowish hair, hind tibiae also with inner and 

 outer fringes of black hair ; tarsi dark brown or dark reddish-brown. 



Northern (North-Western) Khodesia : Changa, 23.viii.1908, "in tent" 

 (R. E. Montgomery ', M.R.C.V.S. : presented by the Liverpool School of 

 Tropical Medicine). 



In the characteristic shape of its wings Diatomineura penetrabilis agrees with 

 D. lineatithorax, as has already been indicated at the end of the description of 

 the latter (vide supra). Owing to the absence of distinct thoracic markings, 

 however, D. penetrabilis cannot be mistaken for the species mentioned, while the 

 regularly banded appearance of the abdomen (particularly noticeable when the 

 insect is viewed obliquely from the side, and due in large measure to the contrast 

 between the pale-haired hind borders of the second, third, and fourth tergites, 

 and the black-haired brownish-tawny portions of these segments) affords a means 

 of distinction from any of the other African species of Diatomineura with which 

 confusion could possibly arise. 



Diatomineura hastata, sp. n. 



Q. — Length (1 specimen) 16 mm. ; width of head 5 mm. ; width of front at 

 vertex 1 mm. ; distance from upper margin of occiput to anterior extremity of 

 face 4 mm. ; length of wing 15*8 mm. 



Front raiv-sienna-coloured pollinose, paler anteriorly, where there is an acicular, 

 clove-brown, median, longitudinal streak, with its upper half grooved ; base of each 

 antenna connected with eye on corresponding side by an oblique, mummy-brown 

 stripe ; third joint oj antennae oehraceous-rufous ; face with a shining clove-brown 

 or black callus below antenna on each side ; dorsum of thorax dark olive-brown, a 

 pair of indistinct admedian stripes dull yellowish-brown, lateral margins paler; 

 dorsum of abdomen olive-coloured, first three segments each ivith a clove-brown 

 median blotch at base, and ivith a large orange-ochraceous area on each side ; wings 

 pale sepia-coloured, not noticeably broader across middle of basal and axillary cells, 

 hind margin being nearly parallel to costa ; legs cinnamon-rufous. 



Head : front sparsely clothed with minute, yellowish hairs ; face in front of 

 orbits dark brown on each side, clove-brown or black above, thinly covered with 

 grey pollen except on shining calli ; jowls, basi-occipital region, and occiput light 

 smoke-grey, jowls and basi-occipital region thickly clothed with whitish hair ; 

 palpi oehraceous-rufous ; proboscis more than 6'5 mm. in length (distal portion 

 missing in case of type) ; first and second joints of antennae ochraceous-buff, 

 greyish pollinose and clothed with minute black hairs, first joint but little longer 

 than (less than twice as long as) second. Thorax : indistinct yellowish-brown 

 admedian stripes on dorsum fairly broad, separated anteriorly by a narrow dark 

 streak, behind which the stripes become more or less fused together according to 

 angle at which they are viewed ; transverse suture on each side filled by an off- 

 shoot from corresponding admedian stripe ; humeral calli dusky cinnamon-rufous ; 

 lateral borders of dorsum behind humeral calli yellowish-grey pollinose, clothed 

 above base of wings and on under surface of anterior portion of postalar calli 

 with a fringe of bright yellowish-white hair ; dorsum of main portion of thorax 

 clothed anteriorly with minute, upstanding, yellowish hairs, and posteriorly with 

 similar blackish hairs, the hair at each extremity being somewhat longer than 



