512 
THE STUDY OF INSECTS. 
I. Tarsi with second segment dilated. 
J. Tarsal claws appendiculate or toothed ; first 
ventral abdominal segment with distinct curved 
coxal lines, p. 534. Coccinellidje. 
JJ. Tarsal claws simple; first ventral abdominal 
segment without coxal lines, p. 535. 
ENDOMYCHIDiE. 
II. Tarsi with second segment not dilated. 
J. Elytra entirely covering the abdomen ; ventral 
abdominal segments nearly equal, p. 542. 
Lathridiidje. 
JJ. Elytra truncate ; the first and fifth ventral ab¬ 
dominal segments longer than the others. 
K. Maxilla with galea distinct; anterior coxae 
small, rounded, p. 542. MONOTOMID^E. 
KK. Galea wanting, anterior coxae subtrans- 
verse. p. 541. Nitidulid^e. 
GGG. All tarsi four-jointed. 
H. The first four abdominal segments grown together 
on the ventral side. 
I. Tibiae dilated, armed with rows of spines, and 
fitted for digging, p. 543. HETEROCERlDiE. 
II. Tibiae not dilated nor fitted for digging, p. 537. 
COLYDIIDiE. 
HH. Ventral segments of abdomen not grown to¬ 
gether. 
I. Wings fringed with hairs. 
J. Hind coxae contiguous and with plates cover¬ 
ing the femora entirely or in part. p. 529. 
SILPHID.E. 
JJ. Hind coxae separate and not covering the 
femora, p. 543. Corylophidje. 
II. Wings not fringed with hairs. 
J. Anterior coxae transverse, p. 541. 
NlTIDULIDiE. 
JJ. Anterior coxae either globose or oval. 
K. Anterior coxae globose. 
L. Tarsi slender, p. 535_ Endomychid;e. 
LL. Tarsi more or less dilated and spongy 
beneath, p. 536. Erotylid/e. 
KK. Anterior coxae oval. 
