332 COLEOPTERA OF NORTH AMERICA. 



Tribe XV.— PHYT<ECII.\I. 



This tribe contains all those species in which the claws are 

 similar, appendiculate or cleft in both sexes; the claws are diver- 

 gent, except in Tetrops and Oberea; in the last-named genns 

 they are divaricate in the front tarsi, and either divergent or 

 divaricate (0. Schaumii) on the hind pair; in Tetrops they are 

 divaricate on all the tarsi. 



The front is moderately convex, broader than long, the eyes 

 are finely. granulated, emarginate or divided; palpi slender, last 

 joint elongate oval, nearly pointed ; antennte shorter, or at must 

 not longer than the body, scape cjdindrical, more slender and 

 shorter than 3d joint (Oberea), stouter and nearly equal to 3d 

 joint in the others. Pruthorax cylindrical, or obtusely tubercu- 

 late on the sides ; elytra cylindrical, rounded or truncate at tip. 

 Front coxffi conical, protuberant, cavities angulated, closed behind, 

 separated by very narrow prosteruum; middle coxis open exter- 

 nally, episterna and epiniera separate (Mecas, Oberea, Tetraopes), 

 or nearly connate (Tetrops, Amphionycha). Ventral segments 

 nearly equal in our genera, 5th more or less different in the sexes, 

 and usually somewhat longer in 9. Legs short, thighs not 

 clavate, middle tibi® simple, hind tarsi with 1st joint not elon- 

 gated, last joint rather long; claws variable in position as above 

 stated, always appendiculate or cleft. 



The side pieces of the metathorax are narrower behind; they 

 are rather wide (as in Saperdini) in the first group,- but less 

 developed in the others. 



The genera seem to indicate several groups, but without study 

 of the foreign forms it is unnecessary to define them at present, 

 and we have included them in a single table. 



Episterna of metatliorax wide ; 



Epipleurse indistinct ; ungues feebly tootbed or cleft. Mecas. 



EpipleuriB distinct ; ungues broadly appendiculate. Oberea. 



Episterna of metatliorax moderate ; 



Eyes broadly divided; protliorax dilated on the sides ; 



Ungues broadly appendiculate. Tetrops. 



Ungues cleft. Tetraopes. 



Eyes not divided ; ungues cleft. 



Antennae pilose, outer joints suddenly shorter. Amphionycha. 



The American species of Tetrops are referable to Phoea Neic- 



