THE STUDY OF INSECTS. 
510 
OO. Antennae with the last three seg¬ 
ments forming a large club. p. 538. 
Dermestidje. 
OOO. Antennae with the last three 
segments somewhat larger than the 
preceding, but not suddenly en¬ 
larged. p. 542. Derodontidje. 
NN. Posterior coxae not dilated into plates 
partially protecting the femora. 
O. Posterior coxae flat, not prominent, 
covered by the femora in repose. 
p. 552. Clerid^e. 
OO. Posterior coxae oval, not promi¬ 
nent. p. 533.SCAPHIDIIDiE. 
OOO. Posterior coxae conical and 
prominent. 
P. Anterior coxae with distinct tro- 
chantins. p. 552. ..Malachiid,e. 
PP. Anterior coxae without tro- 
chantins. p. 553.. .Lymexylid^e. 
KK. Abdomen with six or more ventral seg¬ 
ments. 
L. Anterior coxae flat. p. 529. 
Platypsyllid^e. 
LL. Anterior coxae either globular or conical. 
M. Anterior coxae globular. 
N. Prosternum prolonged behind, form¬ 
ing an acute process moving in the 
mesosternum. p. 544_ Elaterid^e. 
NN. Prosternum not prolonged behind. 
p. 529. Leptinid^e. 
MM. Anterior coxae conical. 
N. Posterior coxae not prominent, flat, 
covered by the femora in repose. 
p. 552. CLERIDjE. 
NN. Posterior coxae more or less conical 
and prominent at least internally, not 
covered by the femora in repose. 
O. Posterior coxae widely separated. 
P. Eyes wanting or inconspicuous. 
p. 529. SlLPHIDiE. 
PP. With well-developed eyes. 
