90 RHYNCHOPHORA — SCOLYTIDAE. 



with a transverse ridge near or at base ; anterior coxae 

 placed not far apart ; apex of tibiae truncate, not hooked, 

 second tarsal joint bilobed, third very small, received 

 between lobes of second ; claws free, toothed beneath ; 

 abdomen with five nearly equal segments ; pygidium not 

 covered. Anthrihidae. 



SCOLYTIDAE. 



A, First tarsal joint as long as the other three together. 



Head not sunk in thorax, vertical or oblique ; ligula repre- 

 sented by a ridge on mentum; maxillary palpi with four, 

 labial with from one to three joints ; funiculus of antennae 

 with four joints, club solid ; thorax more or less cylindrical, 

 sides with cavities for reception of anterior femora ; anterior 

 coxae very large, ovoid, oblique ; tarsi long, third joint 

 entire ; episterna of mesothorax very large, rounded in 

 front. Flatij2Jides. 



IB. First tarsal joint much shorter than the other three 

 together. 



Head sunk in thorax ; ligula free, at least partly, and 

 reaching beyond mentum in front ; all palpi with three 

 joints ; labrum always indistinct ; thorax hoodlike, sides 

 without cavities for reception of anterior femora ; anterior 

 coxae more or less prominent, scarcely ever oblique ; third 

 tarsal joint entire or bilobed ; episterna of mesothorax very 

 rarely large. Scolytides. 



BLATYPIDES, 



Labial palpi two- jointed ; maxillae with one lobe ; maxil- 

 lary palpi membranous, very large, the joints embedded in 

 one another ; labrum very short, inconspicuous ; eyes oval 

 or oblong oval ; elytra elongate, cylindrical, covering 

 pygidium, apex sometimes produced ; anterior coxae placed 

 close together. Platypus, Herbst. 



Platypus, 



Elongate, cylindrical. Dark brown, disc of elytra usually 

 lighter in female ; antennae and legs red-brown. Elytra 

 with punctured striae. L. 2 — 2| 1. Moderately common. 



P. cylioidrus, Fab. 



