602 Nycterihiidae 
extend also down the margins of the cheeks; palpi bearing very long 
stout bristles at the apex. 
Thorax. Absence of ctenidia dealt with above. The chitinous part 
of the thorax just in front of the halter bears an irregular group of 
9 or 10 bristles, not a regular series as m some forms. Halteres large, 
flattened, scale-like, with surface minutely pollinose (they recall those 
of Cyclopodia sykesi). Ventral surface of thorax (Fig. 2) very strongly 
convex from back to front, much broader than long, the exact pro¬ 
portions being difficult to gauge owing to the convexity: median 
longitudinal line marked by a fairly broad streak of darker pigment, 
and strongly impressed, especially at the posterior extremity; the 
obliquely transverse lines present in other Nycterihiidae are only dis¬ 
cernible here with difficulty (represented in Fig. 2 by faint dotted lines), 
the parts being very firmly consolidated: surface-bristles very fine and 
short, hind margin bearing a few longer ones at the angles; surface 
also with two other impressions, one on either side near the lateral 
margin, just in front of the transverse line. 
d Abdomen: dorsally (Fig. 1) this is very bristly indeed. 5 tergites 
are visible in addition to the anal segment, but the basal one has its 
basal portion pale, soft, and bare; the remainder of its surface, and the 
entire surfaces of tergites 2 and 3, are densely covered with short, fine, 
sub-erect bristles: these surface-bristles are present also on tergites 4 
and 5, but only near the hind-margins, the basal parts being bare. All 
5 tergites have their hind-margins set with longer and shorter bristles, 
the long ones of tergites 2-5 being very long and stout. Anal segment 
rather short, broad at the apex, its dorsal surface bare, hind margin 
and sides bearing moderately long bristles, and one very long one near 
each hind angle. 
Ventrally (Fig. 2), the basal sternite, though bare at its base, is other¬ 
wise rather closely covered with short bristles, those at the sides being 
rather longer and directed outwards: the hind margin bears no trace 
of a ctenidium, but only a few bristles of varying lengths, set at rather 
wide and irregular intervals. Sternites 2 and 3 have their surfaces bare 
except for a few bristles near the hind angles: their hind margins bear 
bristles of varying lengths, set rather wide apart, two or more short 
bristles between each two long ones, the long ones near the outer angles 
being very long. Sternite 4 obtusely produced in the middle behind, 
the apical part of the hind margin bearing a group of short, stout, 
blackish thorn-bristles; there is a submarginal series of short sub-erect 
bristles, and on either side of the thorn-bristles the margin bears bristles 
