COLEOPTERA, 515 



B. Elytra with no fold or with a very feeble one on the lower sur- 

 face near the outer edge; pygidium of male and female alike. 



C. Labrum distinct, p. 590 RHINOMACERID^E. 



CC. Labrum wanting. 

 D. Mandibles flat, toothed on inner and outer sides, p. 591. 



RHYNCHITIDTE. 



DD. Mandibles stout, pincer-shaped. p. 591 . . . ATTELABID^E. 

 BB. Elytra with a very strong fold on the lower surface near the 

 outer margin. 



C. The last dorsal segment (pygidium) of the male divided 

 transversely, so that this sex appears to have one more dorsal 

 segment than the female. 

 D. Antennae with a ringed or solid club. 



E. Tarsi narrow, setose or spinose beneath, p. 591. 



BYRSOPIDjE. 



EE. Tarsi usually dilated, brush-like beneath. 



F. Mandibles with a deciduous piece, which is lost soon 

 after emergence from the pupa state, and leaves a scar. 



p. 592 OTIORHYNCHID^E. 



FF. Mandibles without accessory piece in the pupa state, 

 and therefore without a scar in the adult state, p. 593. 



CURCULIONID.E. 

 DD. Antennae with ten or eleven distinct segments, p. 594. 



BRENTHID.E. 

 CC. Pygidium of both sexes undivided. 



D. Pygidium horizontal ; tibiae usually serrate, p. 596. 



SCOLYTIDJE. 

 DD. Pygidium vertical or declivous; tibiae not serrate. 



E. Antennae geniculate; labrum wanting ; last spiracle cov- 

 ered by ventral segments, p. 595 CALANDRID^E. 



EE. Antennae straight; labrum distinct; last spiracle un- 

 covered, p. 598 ANTHRIBIDJE. 



Suborder COLEOPTERA GENUINA. 

 The Typical Coleoptera. 



This suborder includes all the families of Coleoptera 

 except the snout-beetles, which are classed together as a 

 second suborder, the Rhynchophora. 



