new Species of Histeride. 379 
This species evidently much resembles 7. mirabilis, Sch., 
which I only know by description. I have compared it with 
T. trilunatus, Mars., of which there are three examples in the 
Museum in Paris. 
At Pery-Pery, Pernambuco, 5th June, 1892 (#. Gou- 
nelle). 
Homalopygus geminatus, sp. n. 
Oblongo-quadratus, subdepressus, piceus, nitidus; fronte stria in- 
tegra utrinque angulata; thorace lateribus reflexis; elytris 
striis 1-4 integris, 5 nulla, suturali geminata, dimidiata; pygidio 
postice margine reflexo, subtus levi; tibiis extus valde dilatatis. 
L. vix 3 mill. 
Oblong, somewhat quadrate, rather depressed, piceous and 
shining; the head, surface very finely and sparingly punctu- 
late, slightly impressed anteriorly, marginal stria complete, 
well-marked, and angulate at the sides; the thorax very 
feebly convex, impressed laterally, with the margins reflexed, 
the lateral rim continues behind the head in the form of a very 
fine stria close to the edge, punctuation sparse and micro- 
scopic; the elytra, strie, inner humeral fine, carinate, and 
complete, 1-4 tine and complete, the fourth bending towards 
the suture at the base, 5 absent, sutural geminate, parallel to 
the suture and reaching the middle from the apex, the punc- 
tuation is more distinct than that of the thorax, especially 
between the fourth and sutural strie; the propygidium is 
transverse and densely punctulate, somewhat opaque, with 
the lateral edge reflexed ; the pygidium on the upper surface 
is sculptured like the propygidium, and it is semicircular 
behind, with the rim distinctly raised, beneath it is smooth 
and lies entirely under the upper portion; the prosternum is 
bistriate, striz finest and most divergent in front, anterior 
lobe with shallow rugose punctures; the mesosternum has a 
short but fine stria at each of the anterior angles and a fine 
and complete marginal stria anteriorly, but it is not close to 
edge ; the tibie are all dilated. 
The species resembles H. latipes, Bohem., from Panama, 
especially in the form of the pygidium and legs (see fig., Mars. 
Mon. 1861, pl. iv. fig. 1). It differs considerably from 
Hi. remex, Lew., a species which has no frontal stria and a 
simple convex pygidium. 
Hab. S. Antonio da Barra, Bahia, December 1883 (Z. 
Gounelle). 
Teretriosoma unicorne, sp. 0. 
Cylindricum, parum elongatum, viride metallicum, antennis pedi- 
