various Central American Coleoptera. 75 
P. ferrugineum, with the thorax shorter and less quadrate, 
and the dorsal surface of the body usually fusco- or nigro- 
maculate. P. regale, Reitt., from Colombia, is apparently 
a larger, differently-coloured insect, with the surface of the 
body shining and the anterior angles of the thorax produced 
forwards. 
*Pseudaulonium nitidum, n. sp. 
Elongate-oval, narrow, convex, shining, very finely alutaceous ; 
nigro-piceous or black, the antennae, palpi, front of the head, legs, 
humeri, and sometimes the margins of the thorax also, ferruginous. 
Head closely, finely punctate, bifoveate, the eyes large; antennae 
with the joints preceding the club subtransverse in 3, transverse in 9. 
Thorax convex, subquadrate, broader than long, somewhat rounded 
and sharply margined at the sides, and also conspicuously margined 
at the base, the anterior angles projecting forwards, the hind angles 
acute; closely, very finely punctate, the submarginal line on each 
side cariniform. LElytra oblong-oval, a little wider than the 
thorax, the humeri not very prominent ; minutely seriato-punctulate, 
the interstices flat, alutaceous. Beneath shining, sparsely, minutely, 
the thorax more coarsely, punctate. Prosternal process narrow. Legs 
very slender. 
Length 24-34 mm. (¢ 2.) 
Hab. GuatTEMALA, Cerro Zunil, Calderas, San Gerénimo, 
Balheu (Champvon). 
Ten examples. Found on both the Atlantic and Pacific 
slopes, at elevations between 3,000 and 7,000 feet. Separ- 
able at once from P. ferrugineum and P. discolor by the more 
shining surface, the prominent anterior angles of the thorax, 
and the narrower, less convex prosternal process. It cannot 
be identified with P. regale, which has the elytra nigro- 
piceous, with suture, base, and apex, and also a spot before 
and beyond the middle, rufo-ferruginous. 
PYCNOMERUS. 
Pycnomerus, Erichson, in Wiegm. Archiv, 1842, 1, p. 214; 
Sharp, Biol. Centr.-Am., Coleopt. ii, 1, p. 474 (1894). 
Penthelispa, Pascoe, Journ. Ent. i, p. 111 (1860). 
Endectus, Leconte, Class. Coleopt. N. Am. p. 91 (1861). 
Three species of this cosmopolitan genus have been 
described from Central America. The very small form 
now added is much more finely sculptured than any of 
them. It has an abrupt freely 2-jointed antennal club, 
