NORTH AMERICAN COLEOPTERA. 
17 
The males are more slender and rather more coarser than the 
females, the thorax a little longer than wide and with a faint sinua- 
tion in front of the hind angles, which are, however, not divergent. 
There is considerable variation in color in the specimens before 
me, and three varieties may he indicated. 
Var. ornatus Lee. — The elytra have two yellow spaces. The an- 
terior is transverse, post-basal, of irregular form, widest externally, 
but not extending to the humerus nor margin. The posterior is 
behind the middle, transversely oval, not reaching the side nor the 
suture. The femora are piceous, the tibise and tarsi usually paler. 
Var. colon Horn. — Here the elytral markings are reduced to a 
small round spot on each side in the position of the posterior spot 
of the jireceding variety. The legs may be as in ornatus, or entirely 
piceous. 
Var. rncerens . — Entirely black, without elytral markings. The 
legs are nearly always piceous. 
Occurs in California from San Diego northward in the central 
valley, as well as along the coast region to Oregon (Blanchard). 
C. ciicullatns n. sp. — Elongate oval, rather broader in proportion to its 
length than usual in the genus, moderately convex, black; elytra with faint 
bronze lustre; thorax cinereo-puhescent near the hind angles; elytra with ex- 
tremely fine and short flavo-cinereous pubescence ; antennae slender, feebly ser- 
rate, entirely piceous; head flat, closely punctate; thorax scarcely longer than 
wide, sides straight posteriorly, gradually arcuately narrowed from middle to 
apex, hind angles not divergent, the cariua extending in front of middle, apical 
margin arcuate and prolonged over the head, deejtly sinuate near the front an- 
gles; disc convex, without smooth median line; surface very coarsely granulate 
but somewhat smoother on the declivity and near the hind angles ; elytra with 
sides parallel, arcuately narrowed at apical third; apex obtuse, humeri obtuse; 
disc moderately convex, striate, strife punctate, intervals slightly convex in their 
entire extent and closely punctulate ; prosternum granulate in front, rather 
finely punctate posteriorly, a faint transverse impression in front, the lobe short 
and obtuse; propleurfe more finely and closely punctate than the sternum ; met- 
asternuin a little more coarsely punctate; abdomen rather more finely and 
densely ; legs piceous, the tibife and tarsi paler. Length 3.5 mm. ; .14 inch. 
This species is easily known by the form of the apical border of 
the thorax of which the middle forms a short lobe partly concealing 
the head from above. On each side of this lobe is a rather deep 
sinuation causing the front angles to be more acute and prominent 
than usual. 
Specimens have been examined from the Indian Territory ; Co- 
lumbus, Texas (Schwarz), Utah (Ulke). A specimen has been seen 
labeled Ohio, but the locality seems doubtful. 
TRANS. AM. ENT. SOC. XVIII. 
13 ) 
JANUARY, 1891 , 
