374 SCOLTTID^. 



[LeConte. 



and in Hylastes assume very much the same form as in Cossonidce, to 

 which some of these iusects bear a strong resemblance. Tliej^ may be dis- 

 tinguished, however, by the compressed and serrale or spinulose tibite. 



The third joint of tlie tarsi is frequently dilated and bilobed, and the 

 fourth joint, less conspicuous than in the preceding tribes, is sometimes 

 quite indistinct. The first and second ventral segments are always 

 separated by a well-defined straight suture, more deeply impressed than in 

 Tomieini. 



The prothorax is bisinuate behind, with a well defined antescutellar 

 angle in some of the species of all the groups except Hylastes. They thus 

 manifest a tendency to the J.n.<Ayt6id« [Ghoragus, &c.), as Hylastes does 

 towards the Cossonidw. 



In several genera the front coxfe are separated by the prosternum, and 

 in Dendroctomis and the allied European genera Hylurgus and Blastopha- 

 gus the second and tliird ventral sutures are curved backwards at the sides. 

 In Hylastes the prosternum is deeply excavated for the reception of the 

 short beak. In all these characters resemblances are seen to different 

 tribes of Curculionidce. 



Our genera indicate the following groups : 

 Club oval, annulated, scircelj' compressed 2. 



" strongly compressed, nof annulated, pubescent on both 



sides Poly;;rapIil. 



2. Joints of club separated Phloeotribi. 



• ' " closely connate, as usual 3. 



3. First and fifth ventral segments elongated, scutellum not 



depressed *• 



Ventral segments nearlj^ equal and scutellum depressed H y inrgl. 



4. Prosternum very short, funicle with few joints Cryptnrgi. 



Prosternum excavated ; funicle 7-jointed Hylastes. 



Group I. A*olyg:raphi. 

 This group is sufficiently defined by the club of the antennie being large, 

 strongly compressed, pubescent and sensitive, and without sutures on both 

 sides, and by the antennae being inserted as usual at the sides of the front. 

 The tibiae are broadly dilated, obliquely rounded at the apex, and finely 

 serrate ; th3 third joint of tlie tarsi is not bilobed, and the fourth, though 

 small, is distinct. The basal margin of the elytra is acute and serrate. 

 Two genera occur in our fauna : 

 Eyes slightly emarginate, funicle attached at the 



side of the club, outer joints slender CHRAMESXJS. 



Eyes completel}' divided, funicle attached at the 



end of the club, outer joints gradually stouter POLYGRAPHUS. 



CHRAMESXJS Lee. 

 Rhopalopleurus Chap. 

 Bady stout, oval, convex, clothed with small scales and stout, erect 

 bristles, which are not striate as in HypotJienemus Mspidulus (p. 355). 



