SPECIES OF TABANUS.—PART T. 285 
triangular depression at each end of transverse suture drab-grey and clothed 
with black hair ; pleurae and pectus light grey (upper portion of mesopleura 
drab-grey), clothed with greyish white hair. Abdomen: dorsum of first segment 
grey on basal angles, and with a small patch of pale yellowish hair in middle line, 
just beyond scutellum ; distal angles of dorsum of first segment, and sides and 
distal angles of dorsum of five following segments clothed with pale yellowish 
hairs, which on second to sixth segments inclusive extend inwards along hind 
margins ; dorsum of second segment grey at extreme base; hind margins of 
second and following segments isabella-coloured or smoke-grey ; dark portion of 
dorsum clothed for most part with minute black hairs, but on second to sixth 
segments inclusive also clothed in and adjacent to middle line with minute, 
appressed, pale yellowish or ochreous hairs, which on the second segment of a 
specimen from the Anglo-Egyptian Sudan form a pale median triangle, the base 
of which rests on the hind margin while the apex extends to the grey anterior 
border ; paired spots (described in diagnosis above) clothed with minute, 
appressed, pale yellowish hairs, and situate on dorsum of second to fifth (or 
sixth) segments inclusive, one spot midway between middle line and_ lateral 
margin on each side; on the second to the fourth segments inclusive the spots 
are not in contact with either the front or the hind margins, but on the fifth 
segment (and also, when present, on the sixth) they usually touch the front 
margin; when elongate, the spots usually have their longer diameters at right 
angles to the middie line of the abdomen, in which case there is often an 
indistinct greyish connection between the spots belonging to the same pair ; 
occasionally the spots on the second segment are slightly oblique (in the case of 
the specimen from the Anglo-Egyptian Sudan referred to above the spots on the 
second and third segments are obliquely oval); venter light grey, clothed, 
except last segment, with whitish hair, hind margins of second and following 
segments, except last, cream-coloured. Wings hyaline, veins (except costa and 
first longitudinal, which are mummy-brown) pale cinnamon; stigma elongate, 
‘aw-sienna-coloured or paler, inconspicuous. Sguamae pale isabella-coloured. 
Halteres: stalks cream-buff, darker at extremities; knobs cream-coloured, 
isabella-coloured above. Legs: front coxae drab-grey, middle and hind coxae 
grey, all coxae, like all femora and tibiae, clothed with silvery-white hair, which 
in case of tibiae is mixed with black hairs ; femora and tibiae ochraceous-buff, 
femora greyish pollinose, sometimes more or less grey, hind tibiae ciliated on 
outer side with silvery-white hairs mixed with black hairs; front tarsi dark 
brown, not noticeably expanded, first joint (except distal extremity) and extreme 
bases of the three following joints usually cinnamon-coloured ; middle and hind 
tarsi pale cinnamon or buff, tips of joints mummy-brown, last joint usually 
entirely or almost entirely mummy-brown, sometimes dark brown. 
NYASALAND ProrecroRATE and the ANGLO-Eeyprian SUDAN: type and 
sixteen other specimens (five of them presented to the National Collection by the 
Entomological Research Committee) from the Lufira River, North Nyasa, 
Nyasaland Protectorate, 6. viii. 1909, “on crocodile” (Dr. J. B. Davey) ; one 
specimen from Dufile, Mongalla Province, Anglo-Egyptian Sudan, 19. vi. 1911, 
“on cattle” (H. H. King). 
