CRYPTOBIUM. 529 
54. Cryptobium affine. 
Fusco-rufum ; capite piceo, antennis pedibusque rufis; capite haud elongato, post oculos rotundato, cumque 
prothorace nitido, hoc irregulariter punctato, medio longitudinaliter late levigato; elytris quam prothorax 
paullo longioribus, dense sat subtiliter punctatis. 
Long. 73 millim. 
Hab. Mexico, Jalapa, Oaxaca (Hoge) ; Nicaragua, Chontales (Janson). 
There seems little to distinguish this species from some of the varieties of C. centrale, 
except the smaller size and the different male characters; in the sex alluded to the 
fourth ventral plate is provided with a lobe of variable length, which tapers from the 
base to the apex, the latter being nearly acuminate ; the setigerous mark at the base 
of this lobe is feeble, and differs but little from the curvate elevation that exists in the 
females of both C. affine and C. centrale. 
55. Cryptobium grandicolle. 
Nigrum ; antennis pedibusque rufis; capite haud elongato, post oculos rotundato, cumque prothorace nitido, 
hoc ad latera parce punctato, medio latius longitudinaliter impunctato ; elytris prothoracis longitudine, 
crebrius minus fortiter punctatis. 
Long. 11 millim. 
Hab. Mexico, Jalapa (Hoge) ; Guatemata, Balheu in Vera Paz (Champion). 
Although closely allied to C. centrale this species is larger, darker in colour, and has 
the thorax larger, so that it is scarcely perceptibly shorter than the elytra; these latter 
are less densely punctate, and the thoracic punctuation also is more scanty. The male 
characters are the same as in the variety of C. centrale with narrow attenuate lobe. 
Only one example has been received from each locality. 
56. Cryptobium brevipenne. (Tab. XIII. fig. 17.) 
Piceum, angustulum, subdepressum; antennis pedibusque rufis ; prothorace vage punctato ; elytrisquam prothorax 
haud latioribus et multo brevioribus. 
Long. 9 millim. 
Hab. Guatemata, Purula in Vera Paz 4000 feet (Champion). 
Head rather broad and short, sparingly punctate, dull; eyes quite small, not at all 
prominent. Thorax large, slightly narrowed behind, rather sparingly and coarsely but 
subobsoletely punctate, with a broad space along the middle impunctate. LElytra 
narrow at the shoulders, coarsely and closely but not deeply punctate, shining. Hind 
body rather closely punctate, reddish in colour behind. 
The small eyes and short elytra render thisa very distinct species. The only example 
that has reached me is a male; it has the fourth ventral segment provided with an 
elongate rather slender lobe, narrowed behind so as to be almost acuminate at the 
apex, and in front of the base of the lobe there is a transverse setigerous depression. 
Banks of streams in the forest (Champion). 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, October 1885. 3 VV 
