108 GEO. n. HORN, M. D. 



The color of the legs varies, they are usually yellow but the 

 femora are often darker, evea piceous. Ou the elytra the faint costae 

 are sometimes absent. 



This species has been known as pallijjes Lee, but I have no doubt 

 of the identity of this and ohscurus. 



Occurs from Canada to Georgia. 



C collaris Guer. — Oval, slightly oblong, piceous black, shining, head in 

 front, thorax, base of antennae and legs partly, reddish-yellow. Front sparsely 

 and finely punctate, occiput piceous more densely punctured. Antennae half 

 the length of the body, piceous, basal joints pale, third joint a little longer 

 than the second and as broad, these two together a little longer than the 

 fourth. Thorax nearly three times as wide as long, slightly narrowed toward 

 the front, anterior angles rounded, posterior rectangular, sides distinctly ex- 

 planate, especially near the posterior angles, surface very sparsely and in- 

 distinctly punctate and finely pubescent. Scutellum rufous. Elytra a little 

 wider than the thorax, sides gradually arcuate, disc moderately convex, suture 

 not thickened, surface rather coarsely and moderately densely punctate and 

 finely pubescent. Body beneath sparsely and moderately coarsely punctate. 

 Legs variable in color from entirely piceous to pale. Length .14 — .16 inch; 

 3.5 — 4 mm. 



Male. — Elytra without impressions, fourth ventral with a vague concavity 

 at its middle. 



Female. — Disc of elytra with a post-scutellar flattened or slightly depressed 

 space of irregularly oval form, divided by the suture, the punctuation in this 

 region being almost obsolete; sides of elytra at middle with a smaller but 

 deeper impression also feebly punctate. 



This species resembles some of the forms of nijicollis^ but differs 

 in the structure of the antenntie and otherwise. 



Occurs from Massachusetts to Greorgia. The females seem to be 

 very rare. 



C. variabilis Thunb.— Form oval, slightly oblong, moderately convex, 

 pubescent, color variable from piceous to pale brown or testaceous. Head 

 moderately densely punctured but somewhat variable in its fineness. Antennae 

 a little longer than half the bo'ly, the outer joints usually darker. Thorax 

 twice as wide as long, apex and base bisinuate, sides moderately arcuate, 

 margin not explanate, disc moderately convex, surface sparsely punctured at 

 middle, more densely and coarsely at the sides but variable in degree. Elytra 

 a little wider than the thorax, about a fourth or a third longer than wide, sides 

 regularly arcuate, disc moderately convex, subsutural costa moderately well 

 marked, surface moderately densely punctured, the punctures rather fine and 

 becoming less distinct toward the tip. Body beneath usually darker than 

 above, abdomen finely alutaceous. Legs variable in color. Length .08 — .14 

 inch; 2 — 3.5 mm. 



As the name justly indicates, this species is very variable in many 

 respects, the most important being size, color and punctuation. 



The variation in size is probably the least important character, 



