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.RHiNOMACERiDiE. 
CC. Labrum wanting. 
D. Mandibles flat, toothed on inner and outer sides, p. 591. 
Rhynchitid^e. 
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. 
BYRSOPIDiE. 
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# .. Otiorhynchidje. 
FF. Mandibles without accessory piece in the pupa state, 
and therefore without a scar in the adult state, p. 593 * 
CURCULIONIDiE. 
DD. Antennae with ten or eleven distinct segments, p. 594 * 
BRENTHIDiE. 
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 -. CalandriDjE. 
EE. Antennae straight; labrum distinct; last spiracle un¬ 
covered. p. 598.. 
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. 
