514 THE STUDY OF INSECTS. 



I. Metasternum long ; epimera of metathorax visi- 

 ble, p. 585 MELANDRYID^E. 



II. Metasternum quadrate ; epimera of metathorax 

 covered, p. 537 CUCUJID^E. 



GG. Prothorax not margined at the sides, p. 585. 



PYTHID^E. 



EE. Middle coxae very prominent, p. 585. . .CDEMERID;E. 

 DD. Head strongly constricted at base. 

 E. Head prolonged behind and gradually narrowed, p. 585. 



CEPHALOID^E. 



EE. Head suddenly narrowed behind. 

 F. Prothorax with the side pieces not separated from the 

 pronotum by a suture. 



G. Tarsi perfect, with distinct claws ; eyes normal. 

 H. Prothorax at base narrower than the elytra. 



I. Hind coxae not prominent, or but slightly so. 



J. Anterior coxae globular, not prominent, p. 537. 



CUCUJID^E. 



JJ. Anterior coxae conical, prominent, p. 586. 



ANTHICID^E. 



II. Hind coxae large, prominent. 



J. Tarsal claws simple ; head horizontal, p. 586. 



PYROCHROID^E. 



JJ. Claws cleft or toothed ; front vertical, p. 586. 



MELOID^E. 



HH. Prothorax, at base, as wide as the elytra, p. 589. 



RHIPIPHORID/E. 

 GG. Tarsi without claws ; eyes pedunculated. p. 589. 



STYLOPID/E. 



FF. Lateral suture of prothorax distinct ; base of pro- 

 thorax as wide as the elytra. 

 G. Antennae filiform. 



H. Hind coxae plate-like, p. 586 MORDELLID^;. 



HH. Hind coxae, not plate-like, p. 585. 



MELANDRYID^E. 

 GG. Antennae flabellate in the male, subserrate in the 



female, p. 589 RHIPIPHORID^E. 



AA. Head more or less prolonged into a beak ; palpi short and 

 rigid; gular sutures confluent on the median line (Fig. 602, gs); 

 prosternal sutures wanting; the epimera of the prothorax meeting 

 on the middle line behind the prosternum. (Fig. 602, em.) 



RHYNCHOPHORA. 



