SH THE STUDY OF INSECTS. 



I. Metasternum long ; epimera of metathorax visi- 

 ble, p. 585 MELANDRYIDiE. 



II. Metasternum quadrate ; epimera of metathorax 

 covered, p. 537 CucujiD^. 



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



PYTHIDiE. 



EE. Middle coxae very prominent, p. 585. . .CEdemerid^. 

 DD. Head strongly constricted at base. 

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



Cephalcid^. 

 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 coxse not prominent, or but slightly so. 



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



CUCUJIDiE. 



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



Anthicid^. 



II. Hind coxae large, prominent. 



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



Pyrochroid^. 

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



Meloid^e. 

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



Rhtpiphorid^. 

 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 Mordellidje. 



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



Melandryid^. 

 o GG. Antennae flabellate in the male, subserrate in the 



X^ female, p. 589 Rhipiphorid^. 



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

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

 prosternal sutures wanting; the epimera of the prothorax meeting 

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



Rhynchophora. 



