252 PHALACRIDZ. 
Antenne with slender club. Thorax obscure red, margined at the base in the 
middle. Elytra with well-marked sutural stria, and only extremely faint traces of 
other sculpture ; with an ill-defined pale spot near each shoulder, and a larger spot 
near the apex, scarcely separated from its fellow of the opposite side. We have 
received but one specimen from each locality. Those from British Honduras and 
Guatemala are typical; those from Mexico and Nicaragua agree with one another, but 
are a variety, or distinct species, of narrower form, with the spots very nearly obsolete. 
10. Olibrus substrigosus, sp. n. 
Rotundato-ovalis, sat convexus, testaceo-luridus, nitidus, elytris stria suturali posteriusque strigulis trans- 
versis, obsoletis. 
Long. 2 millim. 
Hab, GuateMaLa, El Tumbador, Cerro Zunil (Champion). 
This species differs from O. porrectus in being rather broader and less convex in 
form, of a lurid yellow colour, and in the elytra being provided with an obsolete 
sculpture of short strigee. We have only two examples in bad preservation. 
11. Olibrus atomarius, sp. n. 
Ovalis, convexus, piceus, supra niger, nitidus, antennis pedibusque testaceis; levigatus, elytris stria suturali 
fere nulla. 
Long. 1 miilim. 
Hab. Panama, Bugaba (Champion). 
This minute insect is smaller than the smallest varieties of O. porrectus, and likewise 
of narrower form ; it is very similar to that species, but has a good distinctive character, 
inasmuch as the sutural stria can scarcely be detected, even at the extremity of the 
elytra. The upper surface has no sculpture; and the antenne are slender, with compact 
and elongate club, and yellow in colour. 
The four examples received are quite similar to one another. 0. atomarius is one 
of the smallest Phalacride yet discovered. . 
12. Olibrus microsternus, sp. n. 
Subhemispheericus, testaceus, fere levigatus; antennarum clava crassa. 
Long. 1¥ millim. 
Hab. Panama, Volcan de Chiriqui 3000 to 4000 feet (Champion). 
Antenne short, with thick club, the penultimate joint rather strongly transverse, 
the terminal joint rather short. Thorax short. Elytra with very indistinct sutural stria, 
and with obscure series of extremely minute punctures. 
This little Olibrus is remarkable on account of the very minute prosternal process, 
the middle coxe being, however, widely separated ; these characters, in conjunction 
