REVISION OF THE NYCTOZOILIDES. 159 
prominent, epistoma rounded in front, forming a distinct obtuse 
angle with the canthus, the latter raised and ear-like, extending 
halfway across the eyes, forehead depressed, divided from epistoma 
by deep straight depression not continued to the sides, antennae 
long, longer in $ than in 2 > extending beyond the prothorax 
when at rest in both sexes, joint 3 about two and a-half times the 
length of i, 6 longer than 5, 8-10 strongly transverse and nearly 
spherical, 11 oval, one and a-half times as long as 10 and wider 
than it. Prothorax 3.5x5 mm., wider at base than at apex, 
widest at middle, apex truncate-emarginate, anterior angles 
advanced and acute with vertices rounded, sides sinuate anteriorly 
and posteriorly, strongly rounded in the middle, posterior angles 
obliquely produced and acute, explanate margins wide and hori- 
zontal, undifferentiated from disc in sculpture, extreme border 
narrowly raised throughout and simple ; disc convex with two large 
symmetrical depressions, and, together with the margins, closely 
and evenly punctured (very much as in S (tragus lavicoJlis, Oliv.) 
without medial line. SeuteUum transverse and triangular. Elytra 
much wider than and two and a-half times as long as the prothorax, 
widest behind the middle, shoulders round and wide, sides well 
rounded, each with three well-raised, shining, slightly crenulate 
costae, the first extending from base to the' apical declivity, the 
second from the base extending nearer the apex (sometimes almost 
continuous with the third cost a near apex) with a strong outward 
curve on anterior part, the third starting near the outward bend of 
the second costa (sometimes vaguely extending to the shoulder), and 
nearly reaching the apex ; the suture itself forming a double costa 
less raised than preceding, the intervals between the cosine trans- 
versely rugose and corrugated (not reticulate), the surface every- 
where roughly shagreened, a lateral line of impressions rather than 
punctures more evident anteriorly than posteriorly at extreme 
margin; beneath blackish- brown, quite smooth, three basal seg- 
ments of abdomen minutely longitudinally strigose-punctate, apical 
segments and femora strongly but finely punctate only, pro-, meso-, 
and m eta- sterna, and coxae thickly and not very finely punctured, 
prosternal process rounded at apex, with raised margins ; submentum 
with a broad subdentate process extending horizontally forward at 
