:Jo4 New American Species of the Genera 



Length two-fifths of an inch. 



This remarkable species I found near the Rocky Moun= 

 tains during the journey of Major Long's exploring party. 

 It differs widely from any other species I have seen, by its 

 general aspect, as well as by its short antennae, (which were 

 completely concealed in the lateral fissures of the pectus,) and 

 the rectangular posterior thoracic angles. 



20. E. cucullatus. Thorax rather long ; frontal line re- 

 markably elevated, and concave above. 



Description. Body reddish-brown, with very short hairs : 

 head with the frontal transverse line very much elevated 

 and prominent, laneiform, obtusely rounded and concave 

 on its superior surface : antenna rather long, slender, not 

 serrated, second joint much shorter than the third : thorax 

 longer than broad, rather slender, with a longitudinal im- 

 pressed line ; a little narrowed behind the anterior angles, 

 and before the posterior ones, the latter not very prominent, 

 obtuse : elytra indented at the base of each, with impressed 

 punctured striae, the punctures of the interstitial lines rather 

 large. 



Length nine-twentieths of an inch. 



The peculiar form of the transverse line of the front, 

 renders this species easy of recognition. I found it on an 

 oak tree in June. In form it has considerable resemblance 

 to E. pyrros, Herbst, but is very different, by many other 

 characters. 



21. E. geminatus. Black ; elytra with an oval rufous spot 

 before the middle of each. 



Elater bimaculatvs. Melsh. Catal. 



