TRIBE VII. ERIRHININI. 201 



Described as pirijtrx by LeConte from Lake Superior. Known 

 from Ottawa, Canada. The elytra are shorter, proportionally 

 broader and more depressed than in the preceding species. 



Subtribe III. SMICRONYCHI. 



This subtribe, equivalent to the Desniorhines of LeConte and 

 the Desmori of Dietz, comprises small oval or oblong-oval species 

 primarily distinguished by the basal constriction of beak and 

 connate claws, as mentioned in key. In addition they have the 

 body more or less scaly ; head moderately large, spherical ; eyes 

 transversely oval, coarsely granulated, separated beneath ; thorax 

 usually more or less globose, narrowed in front and constricted 

 behind the apex, the postocular lobes generally distinct; elytra 

 striate-punctate, wider at base than thorax; prosternum emar- 

 ginate in front; femora more or less clavate, unarmed; tibiae 

 with short apical spurs, tarsi slender, the third joint bilobed 

 (Fig. 65, ;' I.) In the males the beak is shorter and stouter, 

 with the antennae usually inserted much nearer tip than in the 

 females. On account of the great number of species, the small 

 size and dull colors they constitute one of the most difficult 

 groups of the entire order, and the following tables and descrip- 

 tions, based mainly upon those of Casey and Dietz, are not with- 

 out their faults. 



By Casey and others the three genera below given are con- 

 sidered as one, all species being placed under Smicronyx. While 

 the characters separating the three may appear trivial, and the 

 species of Pacliyitliancs and the first group of Sniicromjx seem- 

 ingly very closely related, yet they will be found to serve the 

 purpose in lessening the difficulties of handling a very unwieldy 

 group. Therefore the genera as founded by LeConte, and with 

 minor changes retained by Dietz, are kept by us. 



KEY TO EASTERN GENERA OF SMICRONYCHI. 



a. Antennal club large, elongate, always distinct from the funicle (Fig. 



65, /(..); elytra oval, strongly convex, conjointly at most one-half 



longer than wide. VII. PACHYPHANES. 



aa. Antennal club small, suboval, often subcontinuous with the funicle 



(Fig. 65, i.). 



b. Eyes more widely separated beneath; hind tibiae mucronate (Fig. 

 65, /. ); elytra much as in Pachyphanes ; size usually larger. 



VIII. DESMOBIS. 



lit. Eyes narrowly separated beneath; all the tibia? hooked or clawed 

 (Fig. 65, g.. j.) ; elytra, except in the first group, less convex, more 

 elongate, their sides parallel for one-half or more their length. 

 (Fig. 66, (L, e.) IX. SMICRONYX. 



