9 
364 On new Species of Histeride. 
Cylindrical, rather elongate, pitchy brown, shining; the 
head, vertex minutely strigose, with a few irregular shallow 
punctures and a small median fovea, face somewhat narrow, 
flat, and irregularly punctulate, with a marginal three-sided 
carina, carina straight at the base, gradually converging 
anteriorly, and terminating in a somewhat acute raised tip ; 
the thorax striate laterally, margin anteriorly a little wide, 
but before the middle the thoracic edge is cut out somewhat 
abruptly at the expense of the margin; this incision or 
sinuosity admits of the intermediate tibie being moved in a 
narrow cylindrical gallery, and the stria now running close 
to the edge continues to the basal angle, surface distinctly 
and somewhat closely punctured, behind the neck is a short 
median carina, but the thorax is not impressed, anterior 
angles reddish; the elytra more finely and more sparsely 
punctured than the thorax; the propygidium and pygidium 
densely punctured, the latter a little convex; the prosternum 
laterally suleate, sulci shortened a little anteriorly; the 
mesosternum rather widely suleate on either side ; the meta- 
sternum is longitudinally canaliculate, all the sternal plates 
are punctured ; the anterior tibize 5-dentate. 
I do not know the female. 
The form of the thoracic margin noticed above is seen 
more or less distinctly in Zrypeticus indica, bombacis, and 
planisternus, Lew., but it is not such a marked character as 
in 7. thustelinus. 
ITab. Sumatra. 
Pycoca is, Lewis. 
In this genus I find what I believe is a sexual character ; 
in some additional specimens I have acquired of P. africanus, 
Lew., the middle of the pygidium is concave, not the whole 
of the surface. It appears as though the external margins 
were greatly thickened. 
TRYPOBIUS, Schmidt. 
In the three species of the above genus noticed in the 
Ann. & Mag. Nat. Hist., Aug. 1897, p. 195, the sinuosities 
in the thoracic margin are in the reverse position to those 
seen in Trypeticus mustelinus &c. It is the anterior part of 
the margin which is lost in Zrypobcus, and in Trypeticus it 1s 
the basal portion. 
This difference is doubtless of great generic importance. 
