24 
(4KO. H. HORN, M. D. 
Tlie European species is introduced in the table for the comparison 
of its characters with the two in our fauna most closely allied to it. 
C’. soiililis Lee.— Moderately convex, piceous, feebly shining, clothed with 
tine flavo-cinereous silken pubescence, each elytron with an arcuate humeral 
oblique yellow stripe and a short transverse one behind the middle; antennse 
slender, ])iceous, feebly serrate, joints all longer than wide; head vaguely longi- 
tudinally impressed, finely and moderately punctate, slightly scabrous; thorax 
as broad as long, narrowed in front, sides anteriorly feebly arcuate, nearly 
straight at basal fourth, the hind angles stout not divergent, tipped with yellow, 
the Carina extending nearly to middle, but very feeble in front, disc moderately 
closely finely punctate, the median smooth line very feeble, the pubescence ir- 
regularly arranged, giving a holosericeous appearance; elytra as wide at base as 
the thorax, humeri obtusely rounded, disc feebly arcuate, gradually narrowed 
from base, disc deeply striate, striae closely punctate, intervals convex, densely 
punctulate, somewhat scabrous near the base; prosternum sparsely punctate, a 
little more coarsely in front, with two vague transverse impressions, the lobe 
obtusely rounded with narrowly beaded margin, propleurm a little more closely 
punctate than the sternum, shining ; metasternum and abdomen a little more 
coarsely punctate than the prosternum, the apical segment somewhat roughened. 
Length 3-4 mm.; .12— .16 inch. 
In the male the form is more slender, and, contrary to what has 
been noticed elsewhere in Elateridte, the elytral intervals are less 
convex. The hind angles are also very slightly divergent. The 
frontal impression may be vaguely triangular. 
The yellow humeral lunule of the elytra is, in form, vei*y like the 
same mark in Cicindela. The legs are jticeous, but sometimes the 
tibite and tarsi are paler. 
Frotn either of the species of this group this differs in having the 
thorax broadest at base, the antenme and legs piceous. 
Occurs in Nebraska (Ulke), Wyoming and Washington (Morrison) 
C. sestivns Horn.— Oblong, moderately elongate and convex, piceous, basal 
joints of antennse, hind angles of thorax, legs, a humeral and subapical spot on 
each elytron yellowish testaceous, surface moderately shining, sparsely pubes- 
cent ; antennte feebly serrate, joints slender; front rather flat, head vaguely 
punctate and slightly rugulose ; thorax not longer than wide, slightly narrowed 
in front, widest slightly in front of middle, sides arcuate, distinctly sinuate in 
front of the hind angles, which are slender, acute and distinctly divergent, the 
Carina not prolonged, disc moderately convex, not closely punctate, the median 
smooth line feebly evident posteriorly; elytra as wide at base as the thorax, 
humeri obtuse, sides feebly arcuate, disc striate, strife punctate, intervals slightly 
convex, not closely punctulate; prosternum sparsely finely punctate, vaguely 
transversely impressed, the lobe short and truncate, propleur® more coarsely and 
punctate than the prosternum at middle, shining; mesosternum punctured simi- 
larly to the propleui-fe, the abdomen a little more finely. Length 4 — 5 mm. ; 
.16 — .20 inch. 
