452 COLEOPTERA OF NORTH AMERICA. 



moderately long, usually attaining the hind margin of the eye, 

 sometimes attaining the thorax. Thorax with a short row of 

 bristly hairs behind the eyes (and in Pachnaeus very feebly lobed). 

 8cutellum distinct. Metasternum moderately long. Second seg- 

 ment of abdomen longer than the third and fourth together, and 

 separated from the first by an arcuate suture. Articular cavities 

 of hind tibi^ variable. Claws free. 



As represented in our fauna, this tribe does not differ from 

 the group indicated by Lacordaire, except in the addition of 

 Pandeletejus. 



Our genera are as follows : — 



Anterior coxse contiguous ; 



Thorax feebly lobed behind the eyes (the latter transversely oval, 



pointed beneath) and bisinuate at base. Pachnseus. 



Thorax not lobed, base truncate, eyes round, or longitudinally oval ; 



Anterior femora normal, the tibise simple. Tanymecus. 



Anterior femora much longer and stouter than the others, the tibise 



denticulate within. Hadromerus. 



Anterior coxse distant ; 



Anterior femora larger than the others. Pandeletejus. 



The articular cavities of the hind tibiae vary in the genei'a. 

 They are feebly inclosed in Pachnaeus, more decidedly in Tany- 

 mecus, and entirely open in the other two genera. Into this tribe 

 Foli/dacris modestus of Cuba should enter. It has very distinct 

 vibrissje composed of scales, and the anterior coxse are separated 

 as in Pandeletejus. The tribe, as thus constituted,, is not very 

 homogeneous, and with more genera would divide into well- 

 defined groups, each of the above genera constituting a type. 

 With our few genera this appears unnecessary. 



Eadromerus opalimis is found in Arizona, the other species 

 in the Atlantic region. 



Tribe II.— CYPHINI. 



Rostrum robust, deeply emarginate at tip and sides. Scrobes 

 variable. Antennae moderate, second joint of funicle longer than 

 the first, rarely (Aphrastus) equal to it. Tliorax without ocular 

 lobes or fimbrige. Claws free except in Aphrastus. Articular 

 surfaces of hind tibice on the inner face, and cavernous except in 

 Aphrastus, usually glabrous, rarely scaly. Elytra with the outer 



