532 STAPHYLINID A. 
terminal ventral plate being slightly produced in the middle and sinuate at the sides 
behind, and its hind margin very feebly emarginate. 
62. Cryptobium grande. (Tab. XIII. fig. 19.) 
Nigrum, deplanatum; antennis rufis, scapo nigricante ; capite brevi, lato, opaco; prothorace crebre fortiter 
punctato, utrinque ante basin depresso, inter depressiones elevato et polito ; elytris quam prothorax paullo 
brevioribus, dense fortiter et profunde punctatis, subnitidis ; abdomine apicem versus latiore. 
Long. 14 millim. 
Hab. Mexico, Cordova (Sal/é). 
This species is an ally of C. gigas, Sharp, but is readily distinguished by the coarse 
thoracic punctuation and the rather shorter elytra; the punctuation of the head is 
remote and subobsolete yet distinct. ‘The male has a deep longitudinal depression on 
the last ventral plate ; the margins of the depression are obscurely serrate, and its surface 
minutely granulose ; its posterior part bears a large curved excision. The fourth and fifth 
segments on the upper surface show at the base a broad indefinite plica. 
Three examples of this species are extant ; a female is represented on our Plate. 
63. Cryptobium planatum. 
Latum, nigrum ; capite prothoraceque opacis, obsolete punctatis, hoc linea mediali polita anterius minus arguta ; 
elytris quadratis, dense et fortiter punctatis, nitidis. 
Long. 15 millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
Mandibles very elongate ; third joint of the antenne distinctly longer than the rather 
elongate second joint. Head broad, slightly dilated behind the eyes, and very rounded 
behind, dull, finely and obsoletely punctate. Thorax narrower than the head, but 
little more than half as broad as the elytra, dull, with a polished narrow longitudinal 
space, which behind is somewhat raised, and near the front spreads out in an indefinite 
manner, forming a somewhat shining space ; it is finely and obsoletely punctate. Elytra 
flat, not so long as conjointly broad, densely and coarsely punctate. Hind body 
obscurely red at the extremity. 
Of this species one male was obtained by beating cut branches. The seventh segment 
beneath is furnished with a longitudinal depression, terminated in front by a short 
ridge of serration ; the posterior part of the depression bears a notch, the sides of which 
are sinuate; the margins of the impression project minutely behind. The species is 
very closely allied to C. gigas and C. maxillosum ; it differs from the former by the less 
opaque head, thorax, and elytra, and by the elytra being less densely punctate; from 
C. maxillosum by the absence of plice on the fourth and fifth segments. 
64, Cryptobium rostratum. (Tab. XIII. fig. 22.) 
Nigrum ; antennis rufis, pedibus flavis, elytrorum margine apicali anguste rufescente ; capite elytrisque dense 
