424 Mr. G. Lewis on 
stria, 1-4 dorsal strong and complete, 5 apical and clearly 
dimidiate, but it is punctiform and vaguely continued to the 
base, the sutural is apical but passes the middle; the pro- 
pygidium is sparingly and finely punctulate, with finer points 
interspersed ; the pygidium is evenly punctulate; the pro- 
sternum is very sparsely punctulate and microscopically 
strigose, keel not striate, anterior lobe marginate; the meso- 
sternum is sinuous anteriorly and the stria irregularly 
crenulate and complete, the transverse sutural stria is also 
crenulate; the anterior tibise are 6—7-denticulate. 
The general sculpture, especially of the pygidia, and the 
form of the anterior tibize resemble those of H. cavifrons, 
Mars., and allies. 
Hab. Temax, N. Yucatan (Gaumer). One example in 
the Godman Collection. 
Hister tricuspis, sp. n. 
Ovalis, parum convexus, niger, nitidus, supra tenuiter punctatus ; 
fronte haud impressa, stria integra; pronoto striis lateralibus 
crenatis; elytris striis 1-2integris, 3 dimidiata, suturali brevi 
media; pygidio margine antice 3-punctato; prosterno haud striato, 
lobo conspicue marginato ; tibiis anticis obtuse tridentatis. 
L. 43 mill. 
Oval, rather convex, black and shining, finely punctulate 
above; the head, stria complete and almost straight ante- 
riorly ; the thorax, marginal stria is very fine and interrupted 
behind the middle of the neck, the outer lateral is irregularly 
crenulate behind the head and shortened posteriorly near the 
middle, the inner lateral stria is somewhat crenulate and 
nearly reaches the base and anteriorly apparently joins the 
outer stria well within the angle as the interstice is rather 
wide; the elytra, the humeral strie are wanting, the 1-2 
dorsal are complete, 3 dimidiate, 4 represented by a basal 
puncture, sutural is short and discal; the propygidium is 
sparingly punctulate; the pygidium is almost smooth and 
has three punctures at equal distances along its anterior 
margin, the median point is markedly triangular; the pro- 
sternum, the anterior lobe is rather wide with a strong 
marginal stria, the keel is without strie; the mesosternum 
is slightly arched anteriorly and margined with a stria 
irregularly but not markedly crenulate; the anterior tibive 
are obtuse, 3-dentate, the apicai tooth being bifid. 
This species somewhat resembles H. politus, Lew. 
Hab. 'Temax, N. Yucatan (Gaumer). One example in 
the Godman Collection. 
