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 Coccinellid^e. 



JJ. Tarsal claws simple; first ventral abdominal 

 segment without coxal lines, p. 535. 



Endomychid.e. 



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 NlTlDULlD^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 HETEROCERID.E. 



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 CORYLOPHID^E. 



II. Wings not fringed with hairs. 



J. Anterior coxae transverse, p. 541. 



NlTIDULID/E. 

 JJ. Anterior coxae either globose or oval. 

 K. Anterior coxae globose. 



L. Tarsi slender, p. 535 End.omychid;e. 



LL. Tarsi more or less dilated and spongy 



beneath, p. 536 Erotylidje. 



KK. Anterior coxae oval. 



