LAMB—DIPTERA: HETERONEURIDA, ORTALIDA, TRYPETID@, SEPSIDA, ETC. 365 
Head. Top view :—frons, &c., much as last species: as far as can be seen the 
bristles are practically the same. Front view :—face black, rather less deep than normal. 
Side view (Plate 21, fig. 57) :—this is the most abnormal. The antennz are normal, but 
the jowls are very large and swollen, and the hind eye-margins are also very wide : vibrissz 
very large, followed by a few small bristles. The palpi are black and the tongue is pale 
and horny. 

Fig. 44. Desmometopa microps, n. sp. ~ 50. 
Thorax. Much as last but the pollen has mostly disappeared ; cheetotaxy the same 
as far as can be seen. The venation, Fig. 44, calls for no remark, except that the last 
cross vein is a little nearer the wing margin. 
In other respects, including the size, the species agrees with the last, except that the 
abdominal segments are more nearly equal. 
Locality. Seychelles. Mahé: Cascade Estate, at or above 800 feet, 1908—9. 
62. Desmometopa approximatonervis, n. sp. (Fig. 45 and Plate 21, fig. 58). 
This is a single female of a small species which has its cross veins extremely close 
together. It is in rather a battered condition ; much stress cannot be laid on the degrees 
of ‘‘shininess” of the head, &c., as the specimens may be somewhat “ greasy.” 
Head. Top view :—frons black with browner line over forehead. Two lower f. o., 
two upper f. o. bent as usual, a finer bristle between each of above. I. v. and o. v. 
normal ; crossed p. v., small parallel pair between these ; oc. div., between ocelli. The two 
frontal rows of three pairs of bristles are quite long, there are a few over forehead. The 
post-orb. row is long behind o. v. Front view :—the large antenne take up nearly all the 
face, the pit is deep. Side view (Plate 21, fig. 58) :—jowls very narrow, pale; hind head 
narrow black. Antennz black, second joint spined above, third large, round, brownish 
black, arista moderately pubescent. Long vibrissa with inferior small bristles on jowl 
edge, hind jowl with one or two bristles. Palpi pale orange, longer and less clubbed than 
usual, bristly at end. Tongue long and thin, chitinous. 
472 
