LeConte.l 



DKYOPHTHORII^^I. 335 



Beak long, nQt;,^ilated at tip; body uneven, cov- 

 ered Willi a crust DRYOPHTHORINI. 



Beak long, or moderate, usually dilated at the 

 end, with rapidh' descending antennal grooves, 

 front coxae distant, body sometimes depressed.. COSSONINI. 



Beak usually short, always continuous with the 

 front, and equally stout; front coxa; approxi- 

 mate ; body cylindrical RHYNOOLINI. 



Tribe I. i>ltTOPHTHOKlKl. 



I liave associated with DryoplUhorux two other genera which have but 

 little in common with it or with each other, except the following characters, 

 by which they ditter from other CossonidcB, and approach other groups of 

 RhynchopJiora. The beak is longer than the head, not very stout, cylin- 

 drical, not dilated at tip, and the buccal cavity is smaller; the gular pedun- 

 cle and mentum are smaller and narrower than in the other tribes. The 

 tibite are slender, not at all dilated, and the terminal hook is long. The 

 body is coarsely sculptured, and covered with a dirt-culored crust. 



Two groups are indicated by the three genera before me. 



Metasternum long; funicle 4-j()inted Dryophthori. 



Metasternum long or short; funicle 5-7 jointed Dryotribl. 



Group I. I>ryoplilhori. 



A single small species, represents this group in our fauna. It resembles 

 in form Cdlandra, rather than any genus of Cossonidce known to me. The 

 antennal club is rounded, oval, corneous, except the tip, which is spongy 

 and not annulated; the joints of the funicle are only four, while those of the 

 tarsi are distinctly five, though in the South European Chcerorhinm, ac- 

 cording to description, this anomaly disappears, and the tarsi are 4-jointed. 

 The meiasternum is long and the side pieces are narrow; the first, second 

 and fifth ventral segments are very large; third and fourth excessively 

 short, shorter in fact than in any other genus I have examined. The 

 antenni^ are inserted very near the eyes, which are coarsely granulated and 

 transverse. 



DRYOPHTHORUS Sch. 



1. D. corticalis Say, Cure. 24; ed. Lee. i, 292; Boh., Sch. Cure, iv, 1089; 

 Horn, Pr. Am. Phil. Soc. 1873, 431. 



Atlantic district generally; found under bark. Boheman menlioiis the 

 occurreiice in California of D. bituberculatun, which is wide!}' distributed 

 over the islands of the South Pacific; Sandwicli Islands and New Zealand. 

 Its extension to California is doubtful. 



Group Dryotribl. 



Two sjiecies of very remarkable genera are here represented; the first 

 bears some resemblance to Dryophthorus, and in the arrangenienl of Wol- 



