OP PHILADELPHIA- 277 



edges : elytra immaculate : wiugs black : tibiae and tarsi black, 

 nails simple. 



Length more than two-fifths of an inch. 



The form of the palpi prove this species to be closely related 

 to MalthinuH. I found the specimen near the cantonment of 

 Major Long's exploring party on the Missouri river. 



[This is a variety of ChavMognatlius marginatus with immacu- 

 late elytra. — Leg.] 



4. C. JACTATA. — Pale oehreous; thorax with an impressed 

 line, dull rufous, yellowish each side. 



Body pale oehreous ; head yellowish before, above the antennae 

 black, polished ; antennae black beneath, and basal joint rufous ; 

 second joint half as long as the third, which is equal to the 

 fourth : thorax transverse, rounded before ; posterior angles 

 acute ; yellowish each side, on the disk rufous with a blackish 

 line, and with an indented line extending from the middle to the 

 posterior raised edge : elytra immaculate : postpectus blackish 

 on each side: tibiae and tarsi black above, nails with a prominent 

 tooth : venter blackish in the middle. 



Length more than two-fifths of an inch. 



I found this species when with Major Long's party, near the 

 Rocky Mountains. 



[Unknown to me. — Lec] [168] 



5. C. PARALLELA. — Black ; thorax yellow, with a black vitta. 

 Head black ; mandibles honey-yellow ; antennae with the first 



joint yellowish beneath, second joint half the length of the third, 

 which is equal to the fourth : thorax yellow, with a slight tinge 

 of rufous, with a black equal vitta, which occupies not more 

 than one-fourth or one-fifth of the surface; anterior portion 

 rather narrower than the posterior margin ; angles rounded ; 

 elytra black : beneath black : pectus yellow : nails armed with a 

 tooth. 



Length more than one-fourth of an inch. 



This species was labelled in my cabinet with the name of 

 lineola, but that name is pre-occupied. The black line of the 

 thorax is well defined, and its sides are parallel. Occurs in 

 June. 



[This is C. lineola Fabr. — Lec] 

 1825.] 



