TRIBE XXI. CRYPTORHYNCIIIXI. 507 



where it is common infesting the branches of the red bay, Per sea 

 borbonia L., and is never met on oak. (Schwam.) 



XIX. CRYPTORHYNCHUS 111., 1807. (Gr., "hidden" + "beak.") 



Oval or oblong, rather robust, usually densely scaly species, 

 having the eyes rather widely separated; antennae inserted at 

 middle of beak; ocular lobes covering but partially the eyes in 

 repose ; elytra with ten entire strife ; mesosternal process with a 

 deep rounded cavity; metasternum with distinct side pieces; 

 ventral segments 2, 3 and 4 snbequal in length, the second some- 

 times one-fourth longer than either of the others, but not twice as 

 as long as in some of the allied genera; femora thickened, often 

 bidentate ; tibire slender, usually more or less sinuate. The larvae 

 are bark borers and the adults are usually found on bark or dead 

 twigs. 



KEY TO GROUPS* OF EASTERN SPECIES OF CRYPTORHYNCHUS. 



a. Joints 3 7 of funicle gradually diminishing in length, the second 

 joint as long as or longer than the first; club usually Indistinctly 

 annulated. 



l>. Elytra suddenly much wider at base than thorax, the latter usually 



distinctly carinate. GROUP I. 



6&. Elytra but slightly wider at base than thorax. GROUP II. 



oo. Joints 3 7 of funicle equal in length, second joint slightly shorter 



than first; club very distinctly annulated. GROUP III. 



GROUP I. (PAROCHUS GROUP.) 



Species of small or medium size, resembling Conotrachelus in 

 having the elytra suddenly wider than thorax, the humeral an- 

 gles prominent, rounded, the sides gradually somewhat tapering 

 behind; beak slender, longer than thorax, curved, cylindrical, 

 usually carinate and striate near base; legs slender, femora not 

 clavate, indistinctly toothed. 



KEY TO SPECIES OF GROUP I. 



o. Front and middle femora straight beneath, 

 b. Tibiae angulated at base. 



c. Black with a more or less oblique white spot on each elytron; 



thighs bidentate. 



(L Larger, 5 or more mm.; form mere oval. 799. PAROCHUS. 



(1(1. Smaller, not over 4.5 mm.; form oblong. 800. PUMILUS. 



cc. Brown variegated with fuscous; thighs not toothed. 



801. BISIGNATUS. 



*Those of our groups which occur in Central America have received generic names, 

 which, however, we have only partly indicated in the descriptions. According to Faust 

 the imported C. lapathi may be our only true Cryptorhynchus. 



