524 STAPHYLINIDA. 
Antenne elongate. Head, though rather broad, a good deal rounded at the sides 
behind, very definitely punctured on the anterior half, but the punctuation very scanty 
towards the labrum. 
The unique example does not agree sufficiently with C. confine to allow me to unite 
it therewith ; it has a much larger head and more slender thorax, but it is possible the 
two may be the sexes of one species. The male characters consist of a moderately 
broad depression on the third segment, and a rather large and deep, nearly circular 
(but slightly transverse), fovea on the fourth segment, the hind margin of the latter 
being prolonged to form a rather slender elongate lobe. 
44. Cryptobium tenuicorne. 
Gracile, nigrum ; antennis rufescentibus, pedibus cum coxis testaceis; capite suboblongo, opaco, crebrius sub- 
obsolete punctato; prothorace cylindrico, nitido, dense punctato, linea mediali angusta impunctata; elytris 
elongatis, quam prothorax multo longioribus, dense fere subtiliter punctatis. 
Long. 94 millim. 
Hab. Panama, Bugaba 800 to 1500 feet (Champion). 
Antenne very slender, elongate. Head elongate and rather narrow, very dull, except 
a quite small space immediately behind the labrum in the middle. Elytra elongate and 
narrow, their sides quite parallel. 
This species is distinguished among its immediate allies of slender form with delicate 
antenne by its very dull head, the punctuation of which is quite obsolete on the part 
in front of the middle of the eyes. The male has a rather deep transverse impression 
on the third ventral plate, but none on the following segment, the hind margin of 
which forms a broad very short lobe. Two male examples were captured. 
Banks of small streams in the forest (Champion). 
45. Cryptobium ovaticeps. 
Nigrum; antennis rufis, pedibus testaceis, coxis fuscis; capite oblongo-ovali, densius subtiliter sat argute 
punctato, subopaco; prothorace cylindrico, nitido, dense punctato, linea mediali angusta impunctata; 
elytris elongatis, quam prothorax longioribus, densius vix subtiliter punctatis, subnitidis. 
Long. 84 millim. 
Hab. Guatemata, Lanquin (Champion); Panama, Bugaba 800 to 1500 feet, Caldera in 
Chiriqui 1200 feet (Champion). 
This is a slender species with elongate antenne, and long, narrow, parallel-sided elytra 
like C. tenwicorne; the head, however, of C. ovaticeps differs from that of C. tenuicorne 
in being a little narrowed behind the eyes, and the dense rather fine punctuation, deep 
and definite on the anterior half and extending nearly to the front margin, leaving only 
a small elevated space behind the labrum impunctate and polished: as in C. fenuicorne 
the slender thorax has the sides a little rounded and narrow in front. The male has a 
very short transverse setigerous space on the third segment, and a very minute round 
fovea on the next, the hind margin of this latter segment being a little prolonged in 
