134 THE ORDER OP COLEOPTERA. 



E. Mentum large, concealing the maxillte ; sternum not hollowed in front. 

 F. Scrobes linear directed beneath the rostrum ; scape rarely extending 

 beyond the posterior border of the eyes, often not reaching it : 



BIIACHYDERIDES. 

 F F. Scrobes often dilated, forming winglets {pterygia) on the sides of 

 the end of the rostrum, never linear and directed beneath ; scape 

 extending beyond the ej^es (except in Brachystylus,) : 



OTIORHYN CHIDES. 

 E E. Mentum small, not concealing the maxillas ; sternum more or less hol- 

 lowed out in front to receive the rostrum. 

 G. Scrobes deep, linear, reaching the mouth. 



H. Scrobes reaching the eyes. Rather large insects, either glabrous 



or pubescent MOLYTIDES. 



H H. Scrobes various in length ; small insects clothed with hairs or 



fine scales HYPERIDES. 



G G. Scrobes short, curved, sub-basal ATERPIDES. 



D D. Prothorax with ocular lobes ; eyes generallj'^ large, oval and transversal. 

 I. Tarsi hispid, not spongy beneath; third joint, not dilated nor 



bilobed BYRSOPSIDES. 



I I. Tarsi spongy; third joint bilobed. 



K. Rostrum Avidened and hollowed triangularly at the end ; 

 scrobes confluent on the under side of rostrum : 



PROMECOPIDES. 

 K K. Rostrum more or less enlarged, but not notched at the end ; 

 scrobes shallow and incomplete posteriorly : 



CYLINDRORHINIDES . 



Section 2. Longirostres. 



First Sub-section — Synmerides. Anterior coxae nearly or quite contiguous; never 

 with a groove between them for the reception of the rostrum. 



A. Antennje elbowed, first joint much longer than the others. 

 B. Body oblong, cylindrical, covered with a fine powder; tarsal claws soldered to- 



getlier at base , Lixiues . 



B B. Body not cylindrical and pulverulent ; ungues free. 

 C. All the tibise terminated with a claw. 

 D. Tliorax longer than wide, swollen anteriorly; narrowed behind ; eyes 



round Otidocepjialides . 



D D. Tliorax narrowest in front; eyes oval or oblong. 



E. Body rough; eyes almost or quite contiguous above; abdominal sutures 



very deep Prionomekides . 



E E. Body smooth, glabrous or pubescent. 



F. Body elongate, sides parallel, glabrous, punctured ; usually black or 



blueish Magdalinides. 



F F. Body oval; usually Ijrownish and pubescent, and often variegated. 

 G. Tibiie slightly compressed and hollowed on the inner side; rather 



large insects ; inhabit pine trees Hylobiiues. 



G G. Tibiae round ; small insects ; usually found on low plants : 



Ebirhinide^ 

 C C. Tibia; unarmed or simply mucronate at the end. 



