346 SCOLYTID^. 



[LeConte. 



side margin is not distinct.* Tlie mesonotum is never carinate as in Platy- 

 pus. Elytra suddenly declivous in front, so that the edge fits against the 

 base of the pronotum; usually obliquely excavated and toothed on the pos- 

 terior declivit}^; ridge on inner surface near the outer margin, effaced near 

 the tip; groove very deep and narrow. Pj-gidium entirel}' covered. Me- 

 sosternum acute behind, side pieces obliquely divided, epimera small, not 

 attaining the coxse, Metasternum rather long, side pieces narrow. Ventral 

 segments five; first and second longer, closely united; fifth longer than 

 tlie fourth, rounded behind, edge acute, fitting under the elytral edge. 

 Front coxae large, globose, pi'ominent and contiguous; middle coxre nearly 

 contiguous; hind coxa^ also. 



Legs stout, thighs thick, not toothed; tibiae compressed, armed with a 

 large hook at the inner angle of the apex; outer edge serrate and acute; 

 rarely flattened, with two edges, between which are transverse ridges, 

 som nvhat as i:i Platypus. Tarsi slender; four.h joint very small, but dis- 

 tinct; fifth joint long, with large, divergent simple claws. 



Crypturgus and Dolurgus seems to me more properly placed in the tribe 

 Ilylurgini. The other genera represented in our fauna arrange themselves 

 na'urally into groups, according to the structure of the club of the antennae. 

 Club large, oval, compressed, pubescent and transversely an- 

 nulated on both sides, sutures straight or slightly curved; 



inner face usually broadly concave; tibi* serrate Corthyli. 



Club large, oval, solid, pubescent on both sides; eyes com- 

 pletely divided; tibis^ serrate Xyioterf . 



Club small, entirely corneous on the inner face, obliquely 

 truncate on the outer face; truncature spongy and sensi- 

 tive, marked with two concentric lines, or transverse su- 

 tures, or entirely terminal and narrow; tibiae serrate Xylebori. 



Club large, oval or rounded, compressed, entirely corneous 

 on the inner fiice, more or less pubescent on the outer 

 face, and divided by two or thre3 sutures, which are 

 usually sinuated or angulated; declivity of elytra deeply 

 concave with acute margin, usually strongly toothed; 

 funicle of antennsB with five distinct joints; tibiae coarsely 



serrate Toniici. 



Club elongate-oval, marked on each side by sutures which 

 are sometimes long and curved, but sometimes nearly 

 straight; the basal joint corneous, others pubescent; fu- 

 nicle 5-jointed; elytra convex behind, with the suture 

 slightly prolonged; tibiae fringed with hair, but not ser- 

 rate; tarsi usually with joints 1-3 rather stout, fourth 

 very small, fifth long and slender Mlcracldes. 



*One at least of the groups (E'ltoni'des), mentioned by Lacordaire, having the 

 flanks separate from the pronotum, must be excluded from this family; it is al- 

 lied to Rhipidandrus Lee, which I placed in Tenebrionid(e. Its position and af- 

 finities are still doubtful. Vide Chapuis, Mem. Soc. Ro}% I.i6^e, 18C9, ; Horn, 

 Trans. Ent, Soc. 1875, 151. 



