466 SUBFAMILY X. CURCULIOXINJE. 



KEY TO GENERA OF SUBTRIBE ITHYPORI. 



a. Upper surface with scales. 



1). Head silicate, v/ith prominent tubercle each side; tibiae feebly 

 spined at tip. I. PHYRDEXTS. 



bl>. Head not sulcate, without tubercles; front coxae contiguous; claws 

 toothed or cleft; tibia? with the usual strong hook. 



II. COXOTRACIIELUS. 



oo. Upper surface without ornamental scales. 



c. Upper surface glabrous, without scales or setae. 



(I. Middle coxa; narrowly separated; second ventral not as long as 



next two combined. 



e. Tarsal claws equally toothed or cleft, not connate; two outer 

 stria? of elytra separated by a short costa. 



III. RIIYSSE.UATUS. 



ee. Tarsal claws simple, stout, connate at base; outer striae of 

 elytra represented only by a few coarse punctures at base, 

 the interval adjoining flat. IV. CIIALCODHRMI-S. 



del. Middle coxae widely separated, the mesosternum depressed be- 

 tween them; second ventral longer than the next two com- 

 bined; tarsal claws small, slender, not connate; elytra striate- 

 punctate, intervals equal, strongly convex. V. CHALEPONOTUS. 

 cc. Upper surface with long, stout, erect setae; claws divergent, slen- 

 der, simple; form small, globose. VI. MICROHYUS. 



I. PHYRDENUS Lee., 1876. 



Beak as long as thorax, slightly compressed near middle, 

 somewhat widened and flattened toward apex, its antennal 

 grooves oblique; antennae inserted one-fourth from tip; club oval, 

 anrmlated ; eyes large, coarsely granulated, widely separated, al- 

 most whollv concealed in repose by the very large postocnlar 

 lobes; pectoral groove deep, ending in the mesosternnm which is 

 very deeply excavated ; side pieces of metathorax rather large, 

 distinct ; second and fifth ventral segments each slightly longer 

 than the third or fourth ; femora not toothed, tibia? bent at base, 

 feebly spined at tip. Two species are known, one of which has 

 a wide range in our territory, the other apparently being confined 

 to the south. 



725 (8785). PHYRDENUS DIVERGENS Germ., 1824, 282. 



Broadly oval, robust. Blackish, densely clothed with very small scales 

 intermixed with bristles, the scales forming a dense crust of a pale brown 

 color, varied with darker on thorax, base and declivity of elytra. Thorax 

 as wide as long, sides parallel from base to middle, then strongly con- 

 verging to apex; disc uneven, deeply and broadly channeled, with four 

 conspicuous tufts of black bristles. Elytra at base nearly twice as wide 

 as thorax, humeri prominent; strioe fine, hidden by scales; alternate in- 

 tervals distinctly elevated, all with rows of rather stout erect bristles. 

 Length 4.5 4.S mm. 



