TRANSACTIONS 



OF THE 



AMERICAN ENTOMOLOGICAL SOCIETY 



VOLUNIK XVI. 



Revision of the species of CARDIOPHORUS Esch. of 

 America North of Mexico. 



FREDERICK BLANCHARD. 



In the following attempt to define our species of CardiopJiorus it 

 has been the aim to indicate as correctly as possible whatever is ob- 

 servable in the material at hand. The series examined has not been 

 so full in some respects as is desirable, and no doubt further speci- 

 mens and more experience may modify some of the conclusions here 

 adopted. 



All our species have simple claws, but they may be separated into 

 two quite distinct series according to certain differences seen in the 

 prothorax. In the first division, including about one-thii'd of our 

 species, the hind angles of the pronotum are either short or obliquely 

 truncate; beneath, the hind margin of the side pieces is either 

 straight, or at most sinuate inside of the angles, and the submargiual 

 suture is cariniform in its entire length when the hind angles of the 

 pronotum are not truncate ; but when the angles are truncate above 

 the suture is slightly open at base and the margin of the flanks is 

 a little more prominent than the margin of the pronotum, the mar- 

 gins becoming connate shortly before the base and the suture carini- 

 form as before. The suture is straight or feebly sinuate. Accompa- 



TRANS. AM. ENT. SOC. XVI. (1) JANUAKY. 1880. 



