336 CALATHDRIDJE. 



[LeConte. 



laston* would be placed in the first group of his Pentarthrides. The second 

 genus would probably go near Lymantes, which is thus far unknown to us, 

 and may perhaps have some relation to the European Styphloderes. 



Besides the more slender beak, and the crusty covering, these insects dif- 

 fer from those of the following two tribes by the head being rather peculiarly 

 constricted behind the eyes, which are small, rounded and very coarsely 

 granulated; the result of this form of head is that the eyes are situated on 

 the beak, instead of at the sides of the cranium proper. The scutellum is 

 not visible in either of our genera, and I am inclined to believe that this 

 will be found a character of the group, permitting the association of forms 

 now widely separated. 



Antennae with 5-jointed funicle DRYOTRIBUS. 



" 7-jointed " GONONOTUS. 



DRYOTRIBUS Horn. 



1. D. mimeticus Horn, Pr. Am. Phil. Soc. 1873, 433. 



Key West, Florida, February; Mr. Burgess. The eyes are nearly round, 

 and composed, as observed by Dr. Horn, of about twenty lenses; the con- 

 striction is about halfway between the eyes and the apex of the prothorax. 

 The scape of the antennae extends to the hind margin of the eye. 



GONONOTUS n. g. 



Beak rather slender, as long as the prothorax, moderately curved, very 

 coarsely sculptured, separated from the head by a transverse constriction 

 immediately behind the eyes, which are small, convex, prominent, and 

 composed of about thirty to thirty-five lenses. Antennae inserted about 

 one third from the end of the beak, scape slender, extending to the eyes, 

 funicle 7-joiuted, longer than the scape, rather slender, first joint longer 

 and stouter; club small, oval, rather shining, thinly pubescent, annulated 

 on the outer half; antennal grooves lateral, deep, extending to the lower 

 margin of the eyes. Head small, very short. Prothorax about as long as 

 wide, uneven, coarsely sculptured, sides bisinuate and suddenly constricted 

 far from the tip, thus causing two lateral protuberances, one near the base, 

 and another more prominent in front of the middle. Elytra elongate-oval, 

 a little wider than the prothorax, subcostate, with intervening shallow 

 grooves, costoe with rows of extremely short and indistinct hairs. Proster- 

 num narrow, front coxae narrowly separated, middle coxae moderately sepa- 

 rated, hind cox83 very widely separated. Mesosternum short, side pieces 

 narrow. First, second and fifth ventral segments long, third and fourth 

 united about equal to the fifth, first suture obliterated in great part. Legs 

 slender, rather long, thighs slightly clavate, terminal hook of tibiae smaller 

 than usual in this sub-family; tarsi short, rather stout, third joint broader, 

 bilobed and hairy beneath; last joint more thickened at tip than usual, 

 claws small, divergent. 



* Genera of the Cossonidce: Trans. Ent. Soc. London, 1873, p. 434. 



