Species of Talwaretic Simuliidee. 143 
Simulium (s. str.) gracilipes, sp. n., 2. 
Hlead: face yellowish brown, heavily dusted with pale 
grey. Front broad, almost parallel-sided, darker in colour 
than the face, slightly shining, with bluish metallic reflections 
in certain lights. Back of head dull dark grey, with fine 
yellowish pubescence. Proboscis yellow ; antennee and palpi 
yellow except at the tips. Thorax: anterior margin of meso- 
notum rather broadly yellowish, covered with a silvery 
dusting, when viewed from in front; viewed from the same 
angle there is alsoa narrow median longitudinal silvery stripe 
extending backwards one-third of the length of the meso- 
notum, where it broadens out almost to the width of the 
mesonotum and is just connected with a pair of silvery spots 
which are almost surrounded by velvety black. Viewed from 
behind the distribution of the silvery and black colours is 
reversed, Posterior half of mesonotum blackish grey, slightly 
shining. Pubescence sparse, tine and yellowish. Pleure 
dark, grey-dusted, bare except for the usual small hair-tuft. 
Scutellum reddish. Abdomen: fringe of first segment short, 
pale. Second tergite silvery at sides. Third to fifth segments 
dull black ; sixth to ninth tergites brown, slightly shining. 
Legs mainly yellow. Front coxze, femora, and tibiee entirely 
yellow, the last with a just perceptible silvery dusting on the 
outer side. Front tarsi blackish ; the metatarsus noticeably 
paler towards the base, long and narrow, scarcely at all 
enlarged vertically, with a pair of long hairs at its tip; a 
single long hair at the tip of the third joint. Middle legs 
yellow ; the coxe# and the tips of the tarsal joints dark. 
Hind coxe dark; femora yellow, indistinctly darkened at the 
tip; tibiz yellow, rather indistinctly darkened near base, 
along outer margin, and at tip; first two tarsal joints yellow, 
with dark tips, last three entirely dark. Claws all simple, 
vather large. Wings normal. Halteres clear yellow. 
Length of body 3°5 mm. 
Morocco: Fez, May 1909, on mule (Major C. LH. P. 
Fowler, Lt. A.M.C.) ; a single female. 
A very distinct species, probably belonging to the S. or- 
natum group, but with no very close ally in the Palzearctic 
fauna, but approaching S.subornatum in some respects. The 
slender front tarsi are distinctive. The specimen appears 
to be somewhat immature ; when fully hardened the dark 
markings of the legs might be rather more extensive. 
