PLACUSA. 271 
Hab. Guatemata, Balheu (Champion); Panama, Bugaba (Champion). 
Antenne short and not stout; third joint short, fourth and following joints short 
but not strongly transverse; terminal joint short, stout, rounded at extremity. Head 
not much more than half as broad as the elytra. Thorax transverse, convex, rounded 
at the sides and narrowed in front, not densely punctate. Elytra scarcely longer than 
the thorax, each with a large oblique testaceous patch extending from the shoulder 
to the suture behind. Hind body acuminate, densely and finely punctate, slightly 
shining. | 
In the male the hind margin of the seventh dorsal plate of the hind body is armed 
with five elongate teeth: the three in the middle are a little clavate at their apices ; and 
the external tooth on each side is slender, acuminate, and directed inwards. 
Seven specimens have been found of this species in Panama and three in Vera Paz. 
6. Placusa signata. 
Subdepressa, posterius acuminata, haud dense punctata, nitidula, nigra, pedibus testaceis ; elytris quam prothorax 
paulo longioribus, oblique testaceo-signatis; antennis vix elongatis, subgracilibns, articulis 4°-10™ sub- 
quadratis. 
Long. 24 millim. 
Hab. Guatemata, Balheu (Champion). 
This insect is extremely similar to P. obliquata; but the individuals are of larger size, 
the antenne are more elongate, and the male characters very different. In this sex 
the hind margin of the dorsal plate of the seventh segment of the hind body has in the 
middle three very short projections; the middle one, indeed, is so short that it can 
scarcely be detected, the one on each side of it being evidently longer but still quite 
short; at the outside of the plate there is a rather longer, curved, slender, acuminate 
tooth; these five teeth are about equidistant: there are two very fine tubercles on the 
middle of the sixth plate. 
Five individuals have been found of this species, which is in appearance one of the 
most Homalota-like of the genus. 
7. Placusa monilicornis. 
Subdepressa, posterius acuminata, haud dense punctata, nigra, antennarum basi pedibusque testaceis, abdo- 
minis apice fusco-testaceo ; antennis haud elongatis, tenuioribus, articulis 4°-10™ submoniliformibus. 
Long. 2 millim. 
Hab. Guatemata, San Gerénimo (Champion). 
Antenne slender; third joint slender, shorter than the second ; joints fourth to tenth 
each about as long as broad; terminal joint short. Thorax rather strongly transverse, 
not very convex, and but little curved at the sides, only slightly narrowed in front, very 
distinctly and moderately closely punctate. Elytra a good deal longer than the thorax, 
rather closely punctate. Hind body finely and evenly punctate, shining. 
