new Species of Histeride. 185 
Pachycrerus cavifrons, sp. n. 
Cylindricus, brevis, viridi-azneus, nitidus; capite antice clypeoque 
profunde excavatis ; pronoto stria marginali antice interrupta ; 
elytris, striis 1 basali dimidiata, 2-3 brevibus, suturali apice 
abbreviata; prosterno angustato, bicarinato ; mesosterno utrinque 
striato ; tibiis anticis 9-dentatis. 
L. 22 mill. 
Cylindrical, short, truneateanteriorly, brassy green, shining; 
the head in front of the eyes and epistoma widely and deeply 
excavated, base of the excavation vertical ; the epistoma is 
wide and transverse, with anterior edge sinuous, mandibles 
large, with outer edges raised, frontal stria obsolete, surface 
microscopically strigose, with small and larger punctures 
interspersed ; eyes large and transverse; the thorax sculp- 
tured like the head, wider than long, lateral stria ceases at 
the anterior angle, which is somewhat impressed and angular ; 
the elytra—strie, external subhumeral complete, internal 
dimidiate, 1 dorsal, basal, and dimidiate, 2 basal, half length of 
first, 3 basal and very short, sutural commences near the 
middle of the dorsum and nearly touches the base, and for 
half its length turns a little away from the suture; the pro- 
pygidium and pygidium are sculptured like the head; the 
prosternum, anterior lobe is large and transverse, the keel 
short, narrow, and straight, and built up from its base, its 
narrowness brings the anterior coxe into proximity; the edges 
of the keel are carinate, the carine exactly parallel to one 
another; the mesosternum is rather wide and the acumina- 
tion robust, striate at the sides only; all the sternal plates 
are sculptured like the head; the anterior tibie have nine 
coequal and equidistant teeth, the thighs are reddish, tibize 
obscurely reddish brown. 
This remarkable species has the superficies of a species of 
Teretriosoma, but I see no reason for not assigning it to the 
genus Pachycrerus. 
Hab. Cameroon. 
Pachycrerus brevipennis, sp. n. 
Cylindricus, parum elongatus, supra niger, nitidus, subtus obscure 
rufo-brunneus, undique punctulatus; capite antice clypeoque 
profunde excayatis; pronoto stria marginali antice interrupta ; 
elytris striis basalibus 1-3 abbreviatis, 4 brevissima, suturali 
pone medium abbreviata; prosterno antice arcuato, margine 
laterali carinato ; tibiis anticis 6—7-dentatis. 
L. 2 mill. 
Cylindrical, rather elongate, black above, beneath rather 
