CRYPTOBIUM. 525 
the middle so as to form a very broad and very short lobe. In one male, however, the 
lobe is entirely wanting, and the setigerous space of the third segment is very much 
reduced in size. The female is without positive sexual marks. 
Six examples were met with at Caldera and one in each of the other localities; all 
are in a bad state of preservation. 
46. Cryptobium celatum. 
Gracile, nigrum ; antennis rufis, pedibus cum coxis testaceis; capite dense punctato, medio parce punctato et 
nitido ; prothorace cylindrico, nitido, crebre fortiter punctato, linea mediali levigata lata; elytris elon- 
gatis, densissime fere subtiliter punctatis, subopacis. 
Long. 93 millim. 
Hab. GuatmMata, near the city, San Gerdénimo (Champion). 
This species, though very similar to C. ovaticeps, cannot be confounded therewith on 
account of the much less dense punctuation of the thorax. The head, though it may 
be described as oblong-oval, is not so slender as in C. ovaticeps ; its punctuation is very 
dense behind, more scanty and coarser on the disc, and there quite shining, and does not 
extend to the front margin. The thorax is very slender and the elytra very elongate ; 
the antenne are long and slender. The two examples are females, without positive 
sexual marks; the one from Guatemala city has rather longer elytra, which, together 
with the hind body, are also broader. If the difference in the shape of the head between 
C. celatum and C. subgracile should prove sexual, the two may prove to be one species ; 
but I do not think this very probable. 
Banks of streams in comparatively open places (Champion). 
47, Cryptobium subgracile. 
Subdepressum, nigrum; antennis rufis, pedibus cum coxis testaceis; capite suboblongo, minus gracili, dense 
fere argute punctato, subnitido ; prothorace subcylindrico, crebrius fortiter (basin versus parcius) punctato ; 
elytris elongatis, subampliatis, densius vix subtiliter punctatis, subopacis ; abdomine crebrius punctato. 
Long. 10 millim. 
Hab. Guatemata, San Joaquin in Vera Paz (Champion). 
This species has the facies of C. longipenne, though it is very much smaller in size. 
the very elongate elytra are less parallel than in C. tenuicorne, which species also C. sub- 
gracile much resembles, though it has the punctuation on the basal part of the thorax 
much more scanty. The antenne are extremely elongate and slender ; the head is rather 
broad, and the punctuation on the part in front of the eyes quite scanty. The colour 
of the under surface in the unique example is piceo-rufous, but it is perhaps not quite 
mature ; the specimen is a male, and has a rather obscure, short, transverse, setigerous 
impression on the third segment, and a small, shallow, circular setigerous mark on the 
next, the hind margin of this fourth segment being produced so as to form a broad, 
elongate, parallel-sided lobe, with quite rounded extremity. 
