486 COLEOPTERA OF NORTH AMERICA. 



and fourth. The legs are stout and short, and the tibi* are 

 strongly hooked at tip; the tarsi are dilated, and the last joint 

 is very slender, with two very small, simple claws. 



The beak is short, stout, and cylindrical ; the auteunal grooves 

 extend to the lower margin of the eyes, which are oval and 

 transverse. The antennae are inserted about the middle, and are 

 scarcely geuiculated ; the fuuicle consists of seven joints and 

 merges gradually into the oval, annulated, pubescent club. There 

 is nothing peculiar in the mouth; the gular peduncle is long, the 

 meutum small, and the palpi short and small ; the mandibles are 

 curved, and of the usual form. 



The affinities of this tribe seem to be in the direction of Barini. 



Lsemosaccus plagiatus, from the Atlantic region, is the only 

 representative in our fauna. 



Tribe XVI.— CRYPTORII¥.\CHIJVI. 



This tribe contains a large number of genera, which differ so 

 much in appearance and details of structure, that scarcely any- 

 thing can be predicated of all. It may, however, be stated in 

 general terms, that while in common with several other tribes, 

 the beak is received upon the sternum, and lies in repose in a 

 pectoral groove, tliis tribe differs from Zygopini in the smaller 

 size and different position of the eyes, which are more or less 

 covered by the prothoracic lobes; and from Ceutorhynchini by 

 the pygidium being entirely covered. 



The pectoral groove varies in length according to the group ; 

 the front coxte are contiguous in many species of Conotrachelus, 

 and other genera of the group Ithypori. The side pieces of the 

 raesothorax are oljliquely divided, and the epimera attain largely 

 the base of the prothorax on the under surface, without interven- 

 ing between the pronotum and the elytra. The metasternum is 

 either long or short; the side pieces narrow, and dilated in front, 

 except in some genera of Cryptorhynchi. The ventral segments 

 vary in length ; the first suture is straight or sinuate, deep or 

 obliterated ; the second and third are somewhat angulated at the 

 sides. The tibiae are armed with a strong hook at the tip, and 

 the articular surface is oblique ; the claws are simple or toothed. 



But three groups are represented in our fauna, of which the 

 second is esiablished upon a new genus: — 



