336 



REVISION OF THE TENEISRIONlDiE OF AMERICA, 



Elytra broadly oval, broader in front of middle ; gradually declivous 

 behind; thorax as broad at base as long, sides sub-angulate, 

 anteriorly rounded, posteriorly feebly sinuous or gradually 

 converging. o b c s a . 



Elytra elongate oval, more prolonged at apex; thorax as broad at 

 base as long, never sub-angulatc on the sides, which arc regu- 

 larly rounded from apex to base. m a g n a . 

 Thorax longer than broad, sides feebly rounded. 



Elytra elongate oval, sides more nearly parallel ; rather suddenly de- 

 clivous behind. p u n c t a t a . 



C. dilatioollis, Mann., Bull. Mosc. 1843, p. 280; californiea, Mann., loo. cit.: redesoribed and the latter 

 figured in Mag. Zool. 1.844, pi. 188. 



The differences mentioned by Mannerheim between these two species seem not to 

 warrant their being retained as distinct. The sculpture of the elytra is subject to varia- 

 tion, as will be seen, and the presence or absence of one stria may be owing to accidental 

 obliteration rather than a permanent absence from specific causes. The peculiar sculpture 

 of mentum given of californiea is also that of dilaticollis, and while each species has a 

 sculpture peculiar to itself, the differences are so slight as not to warrant any mention in 

 the synoptic table already given. The characters given will suffice to distinguish this 

 species from any which follows. The surface sculpture varies greatly. The Oregon spe- 

 cimens have the thorax sub-opaque, and densely finely punctured; the elytra arc also sub- 

 opaque, still more densely punctured and finely rugose. From this, gradual variations 

 may be noted until the surface is smooth and shining, with rows (more or less distinct) of 

 small distant punctures. 



Length .66-1.06 inch. 



Abundant in Oregon and California north of San Francisco. 



C. obesa, Loo., Ann. Lye. V., 150. 



The thorax is similar in outline to the preceding species, being, however, broader be- 

 hind and more convex above. The elytra are also more pointed behind and are gradually 

 declivous from the scutellum to the apex. 



Length .90-1.12 inch. 



This is the species of southern California and the Peninsula of Lower California. 



C. magna, Loo., Ann. Lye. V., 150. 



The sides of the thorax are in this species rounded and not sub-angulate, as in the 

 two preceding species, and the surface is more convex. The elytra are more elongate 

 and pointed behind. In form it resembles Eleodes gigantea. 



Length .90-1.18 inch. 



