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North American Coleopterous Insects. 



159' 



Body brown-black, covered with short hairs : head 

 each side beneath the antennae yellowish : mandibles yel- 

 lowish at base : antennce^ first and second joints yellow- 

 ish beneath : thorax margined^ black, each side yellow- 

 ish ; disk rather unequal : elytra rather rough irregularly, 



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with three or four obsolete nervures ; ba^se of the exterior 



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margin of the suture and elevated humerus, yellowish : 

 pectus each side and before, yellow : venter^ segments 

 laterally margined with yellow. 



Length less than one fourth of an inch. 



Var. a. Margin and suture of the elytra yellowish to 

 the tip. 



It differs from rujipesy Nob* and scitula^ Nob. in 

 being more robust and hairy ; from angidatay Nob., 

 which it most resembles, by the entirely black feet, yel- 

 lowish humerus and basal elytral margins, yellow lateral 

 ventral margins, somewhat more dilated terminal joints of 

 the palpi, &£c. 



3. C percomis. Black, thorax rufous, immaculate. 

 Inhabits Massachusetts, Harris. 



Body black, somewhat polished : antenna with the 

 basal joint tinged with piceous ; second joint less than 

 one third the length of the third, which is a little shorter 

 than the fourth : thorax transversely oval, bright rufous, 

 the edge a little elevated and dusky ; elytra with a slightly 

 uneven appearance, not amounting to punctures or gran- 

 ulations. 



Length nearly one fifth of an inch. 



I have seen but one specimen which was presented to 

 me by Dr. Harris. 



4. C. bidentdta, Nob. Journ. A. N. S. may prove to 

 be a Silis, Meg. but as my specimen is imperfect, I can- 

 not determine. 



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