ANNALS OF THE LYCEUM. 397 



scutel oval, truncated: elytra dark brown, obscure piceous at 

 base; striae slightly impressed, acute, punctured : beneath piceons : 

 postpectus and middle of the pectus blackish : feet pale. 



Length seven-twentieths of an inch. 



This species is very similar to the preceding, but its greatly 

 superior magnitude puts their specific difference beyond a doubt. 



[Also a Limonius. — Lec] 



19. E. RECtangularis.— Fuscous ; robust; posterior angles 

 of the thorax rectangular. 



Desc. Body robust, very dark brown, almost blackish, with 

 numerous, short, very robust whitish bristles; head with the 

 hairs incurved ; transverse line acute : antennae not reaching 

 more than half the length of the thorax, serrated, pale rufous, 

 first joint fuscous, second and third joints subequal, terminal 

 joint oval : palpi pale rufous : thorax subquadrate, rapidly nar- 

 rowing before the middle ; posterior angles not produced, but 

 rectangular : elytra with regular series of large profound punc- 

 tures : feet dull rufous. [ 264 ] 



Length two-fifths of an inch. 



This remarkable species I found near the Rocky Mountains, 

 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 con- 

 cealed in the lateral fissures of the pectus,) and the rectangular 

 posterior thoracic angles. 



[Belongs to Lacon, which I formerly did not consider suffi- 

 ciently distinct from Adelocera to be received as a genus. — Lec] 



20. E. CUCULLATUS. — Thorax rather long; frontal line re- 

 markably elevated, and concave above. 



Desc. Body reddish-brown, with very short hairs: head with 

 the frontal transverse line very much elevated and prominent, 

 lanciform, obtusely rounded and concave on its superior Burface : 

 antennas rather long, slender, not serrated, second joint nof much 

 shorter than the third: thorax longer than broad, rather Blender, 

 with a longitudinai impressed line; a little narrowed behind the 

 anterior angles, and before the posterior ones, the latter aof \ < r y 

 prominent, obtuse : elytra indented at the base of each, with mi 



