TIMI5K III. IIYPKRIXI. 



Ki.l 



others are described as new. The genus is one of the most diffi- 

 cult of the subfamily, the species being- very similar in form, size 

 and color. For convenience our species are first separated into 

 four groups. 



Fig. 62. Structures of Hyperodcs; a, Antenna of H. solutus 

 showing elongate second joint of funicle; b, antenna of Hyperodes 

 sp. showing first and second joints of funicle subequal; f, front 

 view of head of H. dorsalis; d, same seen from the sioe; , 

 view of head of H. dclumbis; f, same of H. sparsus; g, same of 

 H. echinatus; h, hind tibia of male of H. delumbis; i, thorax and 

 elytra of H. rotundicollis ; j and k, same of H. hornii, male and 

 female; /, same of H. sctigcr, male. (After Dietz.) 



KEY TO GROUPS OF EASTERN HYPERODES. 



o. Second joint of funicle slender and one-half longer than first, the 

 latter stout, somewhat top-shaped (Fig. 62, a.) ; all the tarsi stout, 

 their third joint dilated, bilobed, last joint shorter than the others 

 combined. GROUP I. 



aa. First and second joints of funicle equal or nearly so. (Fig. 62, 6.) 

 l> Beak more slender, about as long or longer than thorax; antennal 

 grooves narrow, sharply defined and but slightly expanded be- 

 hind. (Fig. 62, c., d.) GROUP II. 

 ?jb. Beak stouter, shorter than thorax, generally flattened above; an- 

 tennal grooves widened and ill defined behind (except porcellus). 

 (Fig. 62, e., f., g.) 



c. Upper surface scaly, elytra not clothed with a fine hair-like pubes- 

 cence. GROUP III. 

 cc. Upper surface more or less pubescent; front tarsi of male dilated; 

 alternate intervals of elytra with a row of setae. 



GROUP IV. 

 GROUP I. 



The members of this group are closely allied to Listronotus. 

 In addition to the characters above given they are rather densely 

 covered with clay-yellow or grayish-brown scales, have the ocular 

 lobes prominent, almost wholly concealing the eyes, and the front 

 tibia? incurved at apex, not toothed on the outer side. 



