COSSONIDES. 113 



Eostrum about as long as head, cylindrical, straight or 

 nearly so, scrobes narrow, commencing beyond middle, 

 oblique or curved ; antennae usually inserted between base 

 and middle of rostrum, club small ; scutellum very small ; 

 anterior legs placed slightly apart; mesosternum narrow, 

 linear. Rliyncolus, Creutz. 



XT, Eyes depressed. 



Body more cylindrical than in BJiyncolus, obtusely 

 rounded behind ; rostrum short and nearly parallel-sided in 

 male, shorter and nearly triangular in female ; antennae in- 

 serted considerably behind middle of rostrum, shorter than 

 in Rhyncolus (especially scape), glabrous, joints of funiculus 

 closely articulated, club solid, compressed, cut off straight 

 at apex ; thorax convex, not constricted in front : femora 

 (especially anterior pair) much thickened, with traces of a 

 tootlr beneath ; front pairs of coxae nearly contiguous. 



Stereocorynes, Woll. 



6. Scape of antennae reaching on to eyes, sometimes 

 extending beyond them ; second joint of funiculus 

 elongate. 



I, Anterior coxae placed only slightly apart. 



Similar to Rhyncolus but with antennae distinctly more 

 slender, funiculus less closely jointed and less thickened, 

 club larger. Fhloeophagus, Schoenh. 



TI, Anterior coxae placed rather far apart. 



1, Antennae inserted before middle of rostrum in 

 male, near base in female. 



Rostrum longer in male than in female, scrobes in former 

 commencing in middle, in latter at base, very short. 

 Slightly less cylindrical than Mesitcs, a little more convex, 

 with eyes more approximated, antennae more elongate, 

 club much larger and abrupt, legs slightly longer and some- 

 what farther apart, tliird tarsal joint minutely bilobed, 

 thorax less oblong, body often diffusely covered with very 

 delicate silky pubescence, and rostrum of male considerably 

 longer and more slender, proportionally a little more 

 widened at base of antennae. Rliopalomesites, Woll. 



2. Antennae inserted before middle in both sexes. 



Rostrum contracted behind, expanded in front ; scrobes 

 commencing far in front, abruptly curved ; club of antennae 

 VOL. u, i 



