NORTH AMERICAN COLEOPTERA. 167 



8. — Anteunae 11-jointed 9. 



Antennse. lO-joiuted 12. 



9.— Autennfe distant at base; tarsal claws bifid I. BLEPHARID^. 



Autenufe approximate at base ; claws simple or appendiculate. 10. 



10. — Posterior tibise sinuate near the apes, the sinuation limited above by a dis 

 tinct tooth 

 First two ventral segments connate, the suture, however, distinct ; thorax 



without trace of ante basal impression XIII. CH^TOCNEM-^. 



First two ventral segments articulated : thorax with antc-bHsal impressed 



line XII. EUPLECTROSCELES. 



Posterior tibipe without sinuation or tooth 11 . 



11. — Thorax with distinct ante-basal transverse impression, usually well limited 



atitseuds: elytra punctato-striate X. CREPIDODER^. 



Thorax without ante-basal transverse impression. 

 Spur of posterior tibia small and slender. 



Thorax with a short, but deeply impressed longitudinal line each side ; 



elytra punctato-striate XI. ARSIPODES. 



Thorax without any impression ; elytra with confused punctuation. 



XIV SYSTEN^. 



Spur of posterior tibia broad, emarginate or bifid atapex..XVI. DIBOLI^E. 



12. — Posterior tibia prolonged beyond the insertion of the tarsus, which is placed 



rather on the outer side above the apex XVII. PSYLLIODES. 



Group I.— BLEPHARID.^. 



Antennae 11-jointed, rather distant at base. Thorax without basal 

 impressions. Anterior coxal cavities cU)sed behind. Last joint of 

 posterior tarsi rather slender, the claws bifid. Form short, robust 

 as in many Clirysomel!?e. 



This group, as constituted by Chapuis, contains four genera, but 

 one having representation in our fauna. In the generic description 

 which follows certain characters are mentioned which may require 

 a modification of those of the group when the other genera have 

 been studied a little more closely. 



ISLEPHARIDA Rogers 



Head broadly oval, moderately deeply inserted, front vertical, 

 broad, not carinate, the tubercles flat, widely separated, clypeus trun- 

 cate. Labrum transverse, arcuate in front; maxillary palpi slender, 

 moderately long, the joints cylindrical, the terminal longer than thf 

 third, acute at tip. Antennse rather widely distant at base, slender, 

 half as long as the body, first four joints glabrous, outer joints 

 opaque and finely pubescent, first joint clavate, second oval, half as 

 long, third and fourth slender, each lono;er, five to ten broader than 

 fourth and gradually very slightly shorter, eleventh loDger, appar- 



