186 Mr. G. Lewis on 
dark reddish brown, wholly punctured above and below; the 
head in front of the eyes and epistoma widely and deeply 
excavated, the base of the excavation is vertical, epistoma 
transverse, with anterior rim raised, frontal ridge at posterior 
limit of the excavation emarginate in the middle; the thorax 
nearly as broad as long, lateral rim raised and continued as a 
stria along the base; anteriorly there is no marginal stria ; 
the elytra are not quite so long as the thorax (best seen in a 
side view)—striz, subhumeral external complete, internal 
dimidiate, 1-3 short and basal, each about a third of the 
elytral length, and posteriorly breaking up into punctures, 4 
very short, 5 wanting, sutural longer than the first, all the 
striz are transversely connected at the base; the prosternum, 
anterior lobe very wide, clearly punctured, and microscopi- 
cally strigose, keel narrow, but relatively less so than that in 
P. cavifrons, with two lateral carine straight and parallel, 
interstice punctate; the mesosternum is arch-shaped, the 
shape is rendered conspicuous by the marginal stria being 
complete and cariniform; metasternal suture well-marked 
and straight; the anterior tibie are 6- (or 7-) dentate. 
I see no reason at present why this curious species should 
not also be included in Pachycrerus. In outline it resembles 
a small species of Cis. 
Hab. Cameroon. 
Pachycrerus sulcicollis, sp. n. 
Oblongus, parallelus, depressus, niger, nitidus; capite concavo, stria 
valida antice recta; pronoto utrinque sulcato, stria antice et 
postice integra ; elytris striis subhumerali externa et 1-6 integris ; 
propygidio postice prominulo. 
L, 32 mill. 
Oblong, parallel, depressed, black, shining; the head, face 
concave, surface rather uneven, with various-sized punctures, 
stria complete, cariniform, and straight anteriorly ; the thorax 
wider than long, densely sculptured, surface minutely rugose 
with large, irregular, and sometimes confluent punctures, 
mixed with small points; the lateral edge is carinate and 
continued as a stria behind the head, but the stria is almost 
obliterated by the rough surface-sculpture; the stria is also 
continued round the base of the thorax in a rough crenulate 
form, within the lateral carina the thorax is sulcate, sulcus 
widest near the middle; the elytra—strie, external sub- 
humeral complete, internal wanting, 1-6 all complete, the 
sutural aud fifth joining at the base; the propygidium is 
remarkable, it is irregularly punctured, chiefly at the base, 
