o4 
GEO. H. HORN, M. D. 
erenate, the intervals slightly convex, a dorsal puncture on the third stria behind 
the middle; body beneath smooth, shining, prosternuin not margined at tip. 
Length 6 mm. ; .24 inch. 
This is the smallest species outside of some in the Cryobius series 
known to me in our fauna. It has the general aspect of honedus, 
although less convex, and somewhat more acute posteriorly. It may 
be known from that species by the following j)oints : 
Thorax punctate at base, without marginal line, basal impressions arcuate; striae 
not punctate lioiiestiis. 
Thorax smooth at base, marginal line entire, basal impressions straight ; striae 
punctate, intervals erenate ISlaiiicliardi. 
The unique before me was collected by Mr. F. Blanchard at 
Highland, North Carolina. 
BEMBIDIUin Latr. 
B. haplogonum Chd. is a variety of erosimi Motsch. {mannerheimii 
Lee.), in which the elytra are pieeous with teneous surface lustre, ti 
faint paler space near the humerus, and an oblique space near the 
apex. 
B. plagiatum Zimm. is a picipes Kby., with a faint pale spot at 
apical third. 
B. lacunarius Zimm. is a picipes with imperfectly colored elytra. 
B. arcuatum Lee. agrees perfectly with specimens of unclulatum 
St. as sent me from London. 
B. planum Hald. ; the name is preoccupied, and Guexii has been 
suggested by Chaudoir, Rev. Mag. Zool. 1868. 
I>I$Si€ODERUI^ Lee. 
D. cordicollis n. sp. — Form rather depressed, pieeous to castaneous in 
color, shining, the darker specimens with a faint feneous lustre, anteunpe and 
legs always paler. Head smooth, frontal impressions short, in some specimens 
two punctiform fovese between the eyes; thorax rather more than half wider 
than long, broadly cordate, sides arcuate and gradually narrowing to the base, 
the hind angles entirely obliterated, disc feebly convex, smooth, rarely feebly 
transversely wrinkled, basal impressions short, but rather broad; elytra subde- 
pressed, oblong oval, strige fine not punctate, intervals slightly convex and 
smooth , or flatter and feebly alutaceous 9, the usual rows of punctures on 
the alternate intervals ; body beneath smooth, less shining than above, proster- 
uum not margined at tip. Length 7.5 — 8.5 mm. ; .30 — .34 inch. 
In both sexes there is but one anal puncture on each side. The 
male is more shining than the female, and the elytral intervals more 
convex. The last ventral of the male is more obtusely arcuate at 
