LeConte.] 392 [Feb. 1, 
E. Head prolonged behind the eyes as usual; maxillary palpi with 8d 
joint tumid, 4th very small, acteular not conical, less than one-fourth the 
length of the 3d joint; f with 3d ventral segment lobed behind. 
Cylindrical, coarsely punctured, shining, black, antenn&# and legs testa- 
ceous ; (9 not known.)....... 20. pusillum. 
Slender, brown, more finely punctured, size much smaller, legs pale ; 
(c? not known.)....... PN MUR quu aceite es 21. lepidum, n. sp. 
38. [3.] Cryptobium texanum, n. sp.—Castaneous, sparsely pu- 
bescent, form and sculpture exactly as in C. badium, except that the seg- 
ments 1-4 of the abdomen are black, and the 5th and 6th rufous, just as in 
C. bicolor. Length 8-11.9 mm.; .32-.44 inch. 
c?. 8d ventral segment with a long, obtusely rounded process, setose at 
the sides and tip, and a deep round fovea near the anterior margin ; 2d 
segment with two small approximate setigerous fovese at the middle. 
O. 9d and 3d ventral segments not impressed. 
Bosque Co., Texas, Mr. G. W. Belfrage. Differs from C. 
badium only by the color of the abdomen, and by the im- 
pression of the 2d ventral segment, which in that species 182 
transverse ۶۵10 in both ۰ 
39. [8.] Cryptobium californicum, n. sp. —Shining, black, pu- 
bescence fine. Head elongate, parallel behind the eyes, hind angles and 
base rounded, strongly punctured ; front smooth, with 4 or 6 distant punc- 
tures; eyes rather convex, as long as the space from their front margin to 
the insertion of the antennse.  Prothorax narrower than the head, smooth 
dorsal stripe wide, sides sparsely punctured, punctures rather irregularly 
placed. Elytra strongly and densely punctured, not longer than the pro- 
thorax, abdomen finely and rather densely punctured. Antenne brown, 
legs piceo-testaceous. Length 8 mm.; .32 inch. 
cj. 6th ventral segment narrowly emarginate for one-half its length ; 
base of emargination rounded. 
California and Vancouver Island. Differs from C. pallipes 
by the much stronger panctuation, and much narrower and 
less triangular emargination of the 6th ventral segment of 
the male. 
40. [9.] Cryptobium flavicorne, n. sp.—Black, shining, pubes- 
cence fine ; head oblong.oval, less strongly punctured than in C. californi- 
cum, front smooth with a few scattered punctures. Prothorax scarcely 
narrower than the head, very slightly wider behind, smooth dorsal stripe 
wide, sides sparsely and strongly punctured, punctures not irregularly 
placed. Elytra densely less strongly punctured, less shining, not longer 
than the prothorax. Abdomen finely and densely punctured. Antenne 
and legs yellow testaceous. Eyes of the same size asin C. californicum, 
but less convex. Length 8 mm.; .32 inch. 
i] 393 
[LeConte. 
Massachusetts and Lake Superior, two females. Differs 
from C. pallipes by the head being longer and more parallel, 
and the antennes yellow instead of brown. The elytra are 
more finely punctured, while those of the prothorax are quite 
perceptibly coarser. 
41. [12.7 €ryptobium tumidum, n. sp. — Slender, blackish- 
brown, pubescence fine. Head sub-ovate, gradually a little wider behind 
the eyes, which are rather smaller than in the two preceding species ; 
densely punctured, front less shining, nearlysmooth. Prothorax elongate- 
oblong, slightly but perceptibly narrower behind, smooth dorsal stripe 
broad, ill-defined, sides sparsely and finely punctured. Elytra not longer 
than the prothorax, densely rather finely punctured. Abdomen finely 
punctured. Antenne, palpi and legs dull ferruginous. Length 9.5 mm.; 
.919 inch. 
cf 6th ventral segment deeply emarginate for one-half of its length. 
San Jose, California; found by me in March, 1850. 
42, [15.] Cryptobium prospiciens, h. sp.—Brown, less shining ; 
pubescence fine. Head finely not densely punctured, semi-circularly rounded 
behind the eyes, which are large and prominent; front produced into a 
broad muzzle with high antennal ridges, so as to make a broad frontal 
concavity, which is nearly smooth, marked only by a few large punctures. 
Prothorax elongate, slightly rounded on the sides, narrower than the head ; 
smooth dorsal stripe wide, not distinctly defined ; sides very sparsely and 
finely punctured. Elytra not longer than prothorax, finely punctured. 
Abdomen not shining, scarcely perceptibly punctulate. Antenne, palpi 
and legs paler brown, Length 8 mm.; .32 inch. 
cf 8d ventral segment with a long triangular lobe nearly aeute at tip, 
setose at the sides and end; there is a small transverse fovea at the 
middle; 6th ventral segment triangularly emarginate for nearly half its 
length. © 8d ventral with a round flat slightly elevated tubercle. 
Bosque Co., Texas, Mr. G: W. Belfrage; Arizona, Dr. 
Horn. This species is an excellent example of what is not 
unfrequently seen in other families ; the union of characters 
which define two or more separate groups of species, with 
some peculiar character. In this instance the sexual charae- 
ters of the FF of the two groups of $ A are united, but the 
form of head is quite different from that seen in either of 
them. 
43. [17.] €. Lugubre, n. sp.—Slender cylindrical. shining black ; legs, 
palpi and antenne yellow, the latter darker at the base. Head as long as 
the prothorax and very little wider, sparsely strongly punctured, punctures 
PROC. AMER. PHILOS. SOC. XVII. 101. 2w. PRINTED APRIL 20, 1878. 

