CRYPTOBIUM. 521 
On the authority of the type in Chevrolat’s collection, I identify as Erichson’s species 
a not uncommon Mexican Cryptobium frequently bearing the above name in collections. 
I do not know on what evidence Erichson considered this to be Say’s L. similipenne, the 
description of Say being extremely imperfect, but not, I am inclined to think, referring 
to any species of Cryptobiwm. 'The insect I am now alluding to is very similar to 
C. stygicum, but may be readily distinguished by the sculpture of the head and elytra, 
the former being more densely and deeply and definitely punctate and not so completely 
dull; the elytra are shorter, quite shining, more coarsely and considerably less densely 
punctate. The tibie are deeply infuscate. The male has a rather extensive transverse 
setigerous mark on the third ventral segment, and on the following segment a mode- 
rately large and deep, nearly circular fovea, with a small tuft springing from it; the 
hind margin projecting so as to form a very broad, rather long lobe with greatly 
rounded extremity. 
36. Cryptobium assimile. 
Cryptobium assimile, Kr. Gen. et Spec. Staph. p. 570°. 
Hab. Mexico (coll. Chevrolat) }. 
The type of this species in Chevrolat’s collection is an insect allied to C. antoniense 
and C. filariwm, but not agreeing sufficiently with either to lead me to suppose it to be 
conspecific; unfortunately it is a female. 
37. Cryptobium flohri. 
Subdepressum, latiusculum, nigrum, nitidum; antennis rufis, pedibus testaceis; capite subquadrato, nitido, 
crebrius fortiter punctato; prothorace crebre fortiter punctato, medio longitudinaliter late levigato ; 
elytris quam prothorax paullo longioribus, dense fortiter et profunde punctatis, nitidis ; abdomine crebrius 
subtiliter sed sat profunde punctato. 
Long. 12 millim. 
Hab. Mexico, near the city (Flohr, coll. Sharp), Oaxaca (Hoge). 
This species though similar to C. similipenne is larger and broader, and is readily 
distinguished by the head being polished, especially in front; the thoracic punctuation 
is less dense than in C. similipenne, and that of the wing-cases is remarkably deep and 
definite. The male has a rather elongate line bearing sete on the third segment, and 
on the following segment there is a large transverse setigerous space, having also 
considerable extension in the longitudinal direction, its hind margin being curved and 
less definite than the anterior; this segment also bears behind a very broad lobe, 
extending back beyond the hind margin of the next segment; towards the extremity 
this lobe is a good deal attenuate, its hind margin being, however, quite rounded. 
The female is without positive sexual characters. 
I received a pair of this species (found near the city of Mexico) some years ago from 
Mr. Flohr, and there is a single female amongst Herr Hoge’s captures. 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, October 1885. 3 XX 
