OLIBRUS. 249 
Shorter in form, of a more delicate colour, and with less evident punctuation on the 
elytra than O. guatemalenus, and, in addition, with considerably broader hind tibie 
and larger club to the antenne. The last joint of the antennz is about twice as long 
as that preceding it. The hind margin of the thorax, though fine, is quite distinct. 
The serial punctures on the wing-cases, though very fine, extend forwards nearly to the 
base; the interstitial punctures can scarcely be detected. Four examples. 
3. Olibrus rubiginosus, sp. n. 
Breviter ovalis, convexus, rufo-testaceus, elytris subtiliter seriatim punctatis; antennis articulo ultimo minus 
elongato, apice oblique truncato, subemarginato. 
Long. 23 millim. 
Hab. Mexico, Jalapa (//ége); GuatemaLa, San Geronimo (Champion). 
A distinct species, with the middle of the metasternum closely and coarsely punctate, 
and with short hind tarsi; the metasternal prominence is nearly the same as in 0. qua- 
temalenus. The second joint of the hind tarsus is not greatly longer than the first, and 
the articulation between the two is very distinct ; the tibial spurs are small. The thorax 
is finely margined at the base and feebly lobed in the middle. The sutural stria is 
deep and extends nearly to the base, and the fine punctures forming the series on the 
wing-cases are quite definite and distinct, as in O. guatemalenus. 
4, Olibrus teapensis, sp. n. 
Ovalis, convexus, nitidus, rufo-testaceus, supra fusco-niger; elytris in disco subtiliter seriatim punctatis; 
antennis pedibusque testaceis, illis clava sat elongata. 
Long. 23 millim. 
Hab. Mexico, Teapa in Tabasco (H. H. Smith). 
Antenne with long but rather stout and loosely-jointed club. Thorax rather 
strongly lobed at the base in the middle, and there strongly margined, the sides of 
the base quite unmargined. Elytra with series of fine punctures, quite indistinct at the 
base and behind, and with an extremely obsolete diffuse punctuation. Prosternum rather 
narrow between the coxee, bent upwards immediately behind the coxe. Mesosternum 
forming a rather large band in front of the metasternum between the middle coxe. 
The articulation between the basal and second joints of the hind feet quite distinct, the 
second joint not twice as long as the first. Four specimens, captured in January 1888. 
This species, which in appearance is a quite ordinary Olibrus, is aberrant, inasmuch 
as the mesosternum is more largely exposed in front of the metasternum than nsual. 
5. Olibrus mexicanus, sp. n. 
Breviter ovalis, sat convexus, piceus, antennis pedibusque testaceis, supra limbo dilutiore apice sepe testaceo ; 
sublevigatus, elytris stria suturali. 
Long. 23 millim. 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, December 1888. 2K* 
