2. LEPTIS 281 



socketed epistoma is whitish grey, but the very broad side-cheeks are whiter 

 still and bear rather conspicuous long erect whitish pubescence, which becomes 

 longer and more conspicuous on the jowls and on the puffed-out lower part of 

 the back of the head ; the backmargin against the eye is rather widened about 

 the midclle and from that point to the jowls the back of the head becomes more 

 and more puffed out, but above this prominence the occiput becomes concave 

 and bears on its lower part a single row of pale bristly hairs and on its upper 

 part only a row of short black bristles ; vertex dull black, elevated and bear- 

 ing rather short mixed black and tawny bristles which are all directed 

 forwards ; frons light grey, quite bare. Proboscis large and thick, brownish 

 black to light brown^ hairy on the sucker-flaps ; palpi thin and rather 

 pointed, not much droopjd, dull blackish to light brown with rather long 

 pale pubescence. Eyes quite bare, touching for fully half the space between 

 the occiput and the antennsB ; facets gradually and almost imperceptibly 

 diminishing in size towards the back and top. Antenna? brownish black ; all 

 three joints almost equal in length, but the second joint the stoutest ; all the 

 joints bear a few tiny dorsal bristles ; arista dull black, upturned, and slightly 

 tapering on the basal part. 



Thorax greyish black with hardly any indication of stripes ; humeri rather 

 indistinctly luteous, and the whole quadrangular space between them and the 

 suture rather light grey ; pleurae all rather light grey. Pubescence all pale 

 yellow, neither scarce nor short ; on the pleura? there is short pale pubescence 

 on the prothorax and numerous long thin pale hairs on the metapleura?, while 

 all the mesopleurai except the front and middle parts bear very short 

 inconspicuous pubescence. Scutellum all dull luteous except on the black 

 base, and bearing longer more erect pale pubescence than that on the thorax. 

 Abdomen dull luteous, with a large dorsal triangular blackish spot on each 

 of the second, third, and fourth segments, of which the base lies broadly on the 

 foremargin of each segment but the tip does not quite reach the hindmargin, 

 nor do these spots reach the sidemargins ; on the fifth and sixth segments 

 these black dorsal spots are so much enlarged that only a large (sometimes 

 indefinite) triangular dull luteous spot occupies each hind corner for about 

 half-way up the sides, and these spots are only narrowly connected along the 

 hindmargins ; seventh segment dull black ; the sidemargins bear no dark line 

 on the four basal segments ; pubescence fairly long and abundant but very 

 inconspicuous because it is so pale, but a few stronger depressed black hairs 

 may occur about the hindmargins of the later segments. Belly clear orange 

 on the three basal segments and only slightly darkened down the middle of 

 the fourth segment, but black on the rest ; pubescence very pale yellow, not 

 very scarce nor short, obvious on the black ground colour but very incon- 

 spicuous even though longer on the orange ground colour. Genitalia with a 

 pair of small blackish side lamellaj which end in a pair of incurved orange 

 hooks. 



Legs luteous, but the front and hind femora with a conspicuous though 

 rather badly defined broad blackish ring just after the middle, but on the 

 front pair this ring does not quite extend to the tip, and sometimes the rings 

 are only moderately distinct ; coxa? slaty grey, with the usual alnmdant 

 greyish white pubescence on the front pair ; trochanters dull blackisli ; hind 

 tibia? indistinctly darkened about the tip ; spurs orange with the extreme tip 

 black ; anterior tarsi brownish black with the base widely dull luteous, but 

 the hind tarsi less luteous at the base. Pubescence and tiny bristles pale 

 yellow on the basal half or more of all the femora, but black on_ the rest ; 

 " touch-hairs " present though sparse. Pulvilli brown ; claws blackish brown. 

 Wings slightly smoky, but pale orange about the base ; stigma long, 

 conspicuous, and blackish, but not quite touching the radial vein or the tip 

 of the marginal cell • veins blackish, but orange about the base and on all the 

 subcostal vein and the stem of the postical vein ; costal vein with some pale 

 pubescence on the front part of the base, but with the usual tiny black 

 bristles on the costal ridge which merge as usual near the tip into a fiiie 

 ciliation; subcostal vein with rather dense short black bristles on all its 

 length except at the base ; cubital fork narrower than in the preceding species, 

 and its branches ending more equidistant from the wing-tip ; squanue (alar) 

 glassy yellow with orange margins and with moderate pale yellow fringes j 



