CRYPTOBIUM. 517 
rather more sparsely and finely punctate head, and rather shorter elytra. I have seen 
only two females, one of which is very mutilated. 
25. Cryptobium complectens. 
Subdepressum, piceum, supra nigrum, elytrorum margine apicali anguste flavo, abdominis segmentorum mar- 
ginibus ferrugineis; antennis rufis, pedibus pallide flavis; capite subquadrato, crebrius sat fortiter 
punctato, minus opaco; prothorace fere dense fortiter punctato, medio sat late longitudinaliter levigato ; 
elytris crebre fortius subseriatim punctatis, parum nitidis. 
Long. 11 millim. 
Hab. Mexico, Yautepec, Morelos (Flohr, coll. Sharp). 
This is another species closely allied to C. venustum, and differs in little besides the 
colour; the thorax, however, is slightly larger and rather more closely punctate. I 
have seen but one female. 
26. Cryptobium stygicum. 
Subdepressum, nigrum ; antennis rufis, pedibus testaceis ; capite latiusculo, crebre subobsolete punctato, per- 
opaco; prothorace cylindrico, nitido, crebrius fortiter punctato, linea mediali parum lata impunctata ; 
elytris quam prothorax longioribus, creberrime, sat fortiter, subrugulose punctatis; abdomine parce 
punctato, fere opaco. 
Long. 9-11 millim. 
Hab. Mexico, Oaxaca, Jalapa (Hége); Guatemata (Sallé), San Joaquin (Champion). 
In the male there is a rather short transverse setigerous impression near the hind 
margin of the third ventral plate; on the following segment there is a deep circular 
fovea with a short tuft of sete springing from it, and the hind margin of this segment 
is produced so as to form a very broad short lobe, reaching hardly as far back as the 
hind margin of the next segment, and having its hind margin rounded. The female is 
usually smaller and more slender than the male, but has no positive sexual marks. 
This species agrees with C. collare in the sculpture of the head and hind body, but 
the individuals are a good deal smaller in size, and are readily distinguished by the 
denser and rather finer punctuation of the thorax and elytra in addition to the different 
sexual characters. Herr Hoge obtained a good series, and Mr. Champion and M. Sallé 
one example each. 
27. Cryptobium tinctipenne. 
Subdepressum, haud latum, piceum ; capite nigro, antennis rufis, pedibus testaceis ; capite oblongo, crebre sub- 
obsolete punctato, peropaco; prothorace cylindrico, nitido, crebrius fortiter punctato, linea mediali parum 
lata impunctata; elytris quam prothorax longioribus, creberrime sat fortiter punctatis; abdomine parce 
punctato, fere opaco. 
Long. 9-10 millim. 
Hab. Guatemata (Sallé), San Gerénimo, San Joaquin, Tamahu, Cahabon, Chacoj 
(Champion). 
This is a species very closely allied to C. stygicwm, but has a considerably narrower 
