468 COLYDIID. 
elevated behind, and the second costa—approximate to it—also rather strongly elevated ; 
interstices rather coarsely punctured. Ventral segments finely, rather closely punctate. 
Another very distinct species, of which only one example was obtained. 
7. Colydium pusillum, sp. n. 
Cylindricum, nigrum, sat nitidum; antennis pedibusque rufescentibus; prothorace medio unistriato, striis 
lateralibus obsoletis; elytris ad basin parum costatis, costis prima et secunda ad apicem sat elevatis. 
Long. 33-4 millim. 
Hab. British Honpuras, Belize (Blancaneaur); PANAMA, near the city (Champion). 
Antenne with large club. Head substrigose-punctate, with a well-marked supra- 
ocular carina. Thorax but little elongate; anterior angles not produced ; surface rather 
coarsely and closely punctate, with a deep entire median stria and an obsolete and 
abbreviate lateral one on each side. LElytra shining, with the coste scarcely visible in 
front, but rather sharply elevated on the apical declivity; the interstices distinctly 
punctate. Ventral segments strigose-punctate. ‘wo specimens. 
This species is of much less elongate form than C. championi, and will be readily 
distinguished from that species by the well-marked supra-ocular carina, the presence 
of the lateral lines of the thorax, which are distinct, though obsolete, and by the much 
less elevation of the second costa behind. 
8. Colydium clavigerum, sp.n. (Tab. XV. fig. 1.) 
Elongatum, subcylindricum, piceum, sat nitidum; prothorace fere estriato; elytris costa secunda posterius 
altissime elevata. 
Long. 6-8 millim. 
Hab. Mexico, Villa Lerdo in Durango (Hoge), Orizaba (Sailé). 
Antenne with the club elongate. Head elongate; the eyes long; the epistome feebly 
emarginate in front ; the surface densely punctate. Thorax elongate ; sides straight, but 
a little narrowed behind; anterior angles scarcely at all prominent; the median stria 
absent, and the lateral stria short and obsolete; the surface coarsely, closely punctate. 
Elytra with the second costa so strongly elevated behind as to form with its fellow a 
very deep Jongitudinal depression, extending more than halfway forwards to the base ; 
interstices coarsely sculptured. Ventral segments shining, aciculate-punctate at the 
sides. 
Of this very distinct species I have seen only two specimens. 
AULONIUM. 
Aulonium, Erichson, Naturg. Ins. Deutsch]. ii. p. 275 (1845); Horn, Proc. Am. Phil. Soe. xvii. 
p. 573. 
The species of this genus—to the number of seventeen—occur in North and 
South America and in Europe. A Tasmanian insect has also been assigned to 
Aulonium. 
