LeConte.] 390 (Pep. I, 
bristles, but the 0 segment is foveate as in the $ of the 
species of that group. 
The species of this genus have become so numerous in our 
fauna, that the following table will be found useful for their 
recognition : 
Table of Species of CRYPTOBIUM. 
Sides of head parallel, hind angles strongly rounded........ 
Head gradually narrowed behind the eyes 
Head short and semicircularly rounded behind the eyes.. 
. Last joint of maxillary palpi conical, half as long as the 3d joint....A. 
Last joint of maxillary palpi small, acicular, one-third as long as the 34 
joint, which is more thickened at the tip 
Last joint of maxillary palpi very small, not conical, one-fourth as ta 
as the 3d joint, which is Bude much thickened at the tip... .:...: .B. 

.. f 3d ventral segment i s near ie Bias and with a long and broad 
apical process, extending over the next segment, and furnished with 
long stiff black sete ; 2d segment with a short transverse fold at the 
middle; 9 with 2d, or 2d and 8d ventral segments each with a trans- 
verse fold or fovea . 
c? 6th ventral segment deeply and acutely emarginate, sometimes al- 
most to the base; Y ventral segments not impressed nor foveate.. ۰ 
. Uniform chestnut brown, feet testaceous yellow aD, 
Rufo-testaceous, head and abdomen, except last two segments black, or 
dark 
Black, last ventral segments brownish, antennz brown, legs testaceous.5. 
O 2d ventral segment with a transverse fold at the middle...1. badium. 
O 9d ventral segment not impressed ; head less convex and more paral- 
lel than in C. badium ..2. pimerianum. 
Q 9d ventral segment not impressed ; head with sides more gradually 
rounded behind ; last two abdominal segments paler.3. texanum, n.sp. 
© with 2d ventral segment foveate ; head and abdomen black, last two 
segments pale Mv 4. bicolor. 
9 asabove, head only black ۱ PS P . a. melanocephalum. 
© 2d and 3d ventral segments each with a short transverse fold at the 
Hee oi ius eis . 5. floridanum. 
© 2d ventral segment with a transverse fold, 3d foveate....6. carolinum. 
Black, shining, antennes dark brown, legs testaceous.. 
Black, shining, legs and elytra bright rufous; the latter with a broad 
black stripe extending from the base to the middle. 
. Antenne brown ; punctures of prothorax finer 
Prothorax strongly punctured ; antenne brown.8. californicum, n.sp. 
Prothorax strongly punctured ; antennee yellow..9. flavicorne, n. sp. 
Sides of head parallel behind the eyes....... ecce c UE 
Head wider behind the eyes; و ره ماع‎ ana 12. tumidum, n. sp. 
ی سس ی ات و 
1878.] 3 91 [LeConte, 
9. Elytra not longer than prothorax........ s... o 7. 10. pallipes. 
Elytra longer than thorax sido. «2 echt. latebricola. 
EN 
B. $ 6th ventral segment triangularly emarginate ; O 2d and 3d ventral 
segments not impressed. Prothorax with dorsal series of punctures ; sides 
very sparsely punctured. Elytra very coarsely punctured. Last joint 
of maxillary palpi conical, half as long as the 3d in serpentinum, smaller 
in eribratum. 
Shining, black, antenne brown, legs and elytra bright rufous ; protho- 
rax of usual form, neck stouút....... 13. cribratum. 
*hining, bright rufous, front of head, prothorax and last two segments 
of abdomen black; prothorax narrowed in front; head with sides 
more obliquely rounded behind, neck small.*......14. serpentinum. 
C. Head short behind the eyes and semicircularly rounded ; eyes large, 
prominent, looking forwards, in consequence of the front being suddenly 
contracted into a broad muzzle ; antenne more distant from the eyes than 
usual; maxillary palpi long and slender, last joint conical, one-third the 
length of the preceding ; hind trochanters very acute at tip. f with the 
4th ventral segment prolonged behind into an acute triangular process ex- 
tending to the hind margin of the 5th segment ; slightly foveate at the 
middle ; 2d and 3d segments tumid, with an acute edge near the hind mar- 
gin; “th ventral acutely emarginate except in lugubre; QO 3d ventral 
with a round flat tubercle. 
Brown, sparsely setose, head sub-opaque, sparsely and finely punctured; 
prothorax sparsely and finely punctured, with a broad, smooth, dorsal 
stripe; elytra finely and densely punctured and pubescent; legs rufo- 
testaceoust 15. prospiciens, n. sp. 
D. Head prolonged behind the eyes, as usual; maxillary palpi with 3d 
joint more thickened at the tip, 4th small, acicular, conical, less than one- 
third as long as the 3d joint; f with 3d ventral segment lobed behind. 
Black species, antenne and legs pale rufous. 
Head shining, coarsely and sparsely punctured, elytra coarsely punc- 
tured, almost in rows 
Head opaque, finely and densely punctured, front sparsely punctured ; 9 
3d and 4th ventral segments deeply transversely impressed, setigerous 
at the middle; elytra densely punctured . 16. despectum. 
Head long, sides nearly parallel behind the eyes ; in both sexes the 2d 
ventral segment has a small fovea bearing two black spines, in one sex 
the 3d segment has also a small fovea.... 17. lugubre, n. sp. 
Head somewhat obliquely narrowed behind the eyes: 9 2d and 8d ven- 
tral segments with small impressions. ...........18. obliquum, n. sp. 
Head obliquely narrowed behind the eyes, which arelarger: 9 2d and 
9d segments not impressed ,ی‎ parcum, n. sp. 
* This species seems allied to C. Traili Sharp, Staphyl. Amazon Valley, Trans. 
Lond. Ent. Soc. 1876,221; these two species show an approach tothe genus Ophit tes. 
y Cryptobium en and eylindricum Sharp, op. cit. supra, 220, seem allied 
by the form of the head to this remarkable species. 

