20 
GEO. H. HORN, M. D. 
The female has simjile ventral segments, the antenme a little shorter, 
and the joints, consequently, relatively broader. 
Superficially this species closely resembles quadriguitatus (tetra- 
graphus), but the thorax is smoother, i. e., the roughness does not 
extend so far j)osteriorly, and the median smooth line is shorter. 
Thomsom states (Skand. Col. vi, }). 116) that in the male of tetra- 
graphus the anterior tibije are inwardly dilated near the apex. No 
such structure is seen in our species. 
This species is the form for which Dr. LeConte retained the Mel- 
sheimer name guttatnius, but I have elsewhere shown that the de- 
scription applies accurately to that described previously as exigtms 
Rand. 
Occurs in the District of Columbia (Ulke) ; northern Illinois. 
C. caiiriiiiis n. sp. — Oblong, moderately convex, piceous, slightly shining, 
surface finely ciuereo-puhescent, each elytron with a small yellow spot at hu- 
merus, a second suhapical, both indistinct; antennae slender, feebly serrate, en- 
tirely piceous; head convex, a slight median impression posteriorly, surface 
opaque, finely asperate; thorax a little broader than long, narrowed in front, 
apex emarginate, sides parallel posteriorly, then gradually arcuately narrowed 
to the front, hind angles stout but acute, the carina extended two-thirds to apex, 
disc convex, median line somewhat smooth in front, surface asperately punctate 
in front, finely and closely posteriorly ; elytra as wide as the thorax, humeri 
obtuse, sides scarcely arcuate, apical third arcuately narrowed, apex obtuse, disc 
striate, striae faintly punctured at the sides, intervals feebly convex, minutely 
and moderately closely punctate ; prosternum finely not closely punctulate ; 
a distinct transverse impression, anterior to which the punctuation is rather 
coarse and rugose; lobe prominent, obtusely rounded in front, sutures widely 
double, smooth and grooved, propleurae opaque, densely and very minutely punc- 
tulate; metasternum and abdomen densely finely punctulate; femora piceous, 
tibiae and tarsi testaceous. Length 2 — 2.5 mm. ; .08 — .09 inch. 
The males have an oval flattened space in the middle of the first 
v^entral segment enclosing a small tubercle, a second tubercle near 
the margin of the second segment. Females are not known to me. 
In a superficial comparison this species might be supposed to be 
merely a Melsheimeri with sj)ots less distinctly marked, but here the 
antennte are quite black and the male sexual characters different. 
Occurs in the State of Washington. 
CL «lis|>ersiis n. sp. — Oblong, moderately convex, piceous black, feebly 
shining, sparsely and finely cinereo-pubesceiit, each elytron with a faint humeral 
and subapical yellow spot, or without any ; autenuse slender, feebly serrate, en- 
tirely piceous, or with joints 2-3 pale; head convex, sparsely asperately punc- 
tate; thorax a little wider than long, apex emarginate, sides parallel for a short 
distance posteriorly, thence arcuately narrowed to the front, the hind angles 
