310 COLEOPTERA OF NORTH AMERICA. 



and the costate elytra, with epipleurae prolonged to the tip, a 

 character I have seen in no other tribe. 



Antennae short, serrate, 11th joint appeudiculate. Pteroplatus ? 



Antennae longer, sleuder, 11th joint simple. Holopledba. 



Group I. — Rosaliini. 



A very distinct tribe, represented by Rosalia funebris, in 

 Oregon and Vancouver, a large, elongate, velvety black insect, 

 with bands and antennal rings of cinereous. The head is 

 moderate, front not elongated, obliquely declivous, antennal 

 tubercles not elevated, genae long; eyes finely granulated, very 

 deeply eniargiuated, upper lobe rather broad; antennae long, outer 

 joints sericeous, densely pubescent, joints 3-7 with a tuft of 

 longer hair at the apex, last joint feebly divided in % . Mandibles 

 stout, acute, with a small tooth near the base ; mentum narrowed 

 in front, entirely corneous ; palpi nearly equal, truncate at tip. 

 Prothorax constricted at base and apex, with an acute lateral spine 

 each side, and two acute dorsal tubercles; presternum rather 

 broad, coxal cavities strongly angulated, widely open behind ; 

 mesosternum broad, truncate behind, declivous in front; epimera 

 very large, extending to the coxal cavities ; metasternum not 

 acutely emarginate behind, episterna rather wide, narrowed 

 behind, and nearly pointed ; intercoxal process of 1st ventral 

 broadly rounded in front, segments nearly equal in length, 5th 

 truncate at tip, with an acute, short, medial cleft in 9 ; shorter, 

 triangularly impressed, and hairy in % ; the last dorsal in % is 

 deeply emarginate, and in 9 rounded and subtruncate; the 6th 

 ventral and corresponding interior dorsal segment is prominent 

 and truncate in ?. Legs slender, moderately long, thighs not 

 clavate, tibial spurs small, 1st joint of hind tarsi as long as the 

 two following united. 



The affinities of this tribe are somewhat doubtful ; the scu- 

 tellum is rounded behind ; the mesonotum is smooth, with a broad 

 medial vitta of stridulating surface, and a small lateral space is 

 punctured and pubescent. The form of the front coxae is very 

 much as in Callidium, near which it is placed by Schiodte, but 

 the long and tufted antenna?, with the 2d joint very small, and 

 the tuberculate prothorax and slender legs prevent such an asso- 

 ciation. The eyes embrace the base of the antenna? rather less 

 than in the neighboring tribes. 



