130 ZOOLOGICAL EXERCISES. 
Section HETEROMERA. 
ANALYSIS OF THE FAMILIES. 
A. Head narrowed behind into a neck. 
a. Body arched ; head inserted very low Mordellide. 
b. Body normal. 
The three last joints, of the maxillary 
palpi enlarged . . . Melandryide. 
None of the joints, or the last only, 
enlarged . Hdemeride. 
B. Head not narrowed Lehiadl. 
a. Claws of the tarsi denticulated . Cistelide, 
b, Claws of the tarsi simple. 
Antenne filiform . ; Helopide. 
Antenne moniliform . . Lenebrionidee. 
Section TETRAMERA. 
ANALYSIS OF THE TRIBES. 
A. Head produced into a beak Rhynchophora. 
B. Head not produced into a beak. 
a. Antenne linear. 
Body elongate ; antennzs very long Longicornia. 
Body ovate or round ; antennzs mode- 
rate . Phytophaga, 
b. Antenne clavate. Clavipalpr. 
Tribe RHYNCHOPHORA. 
ANALYSIS OF THE FAMILIES. 
A. Rostrum short. 
Palpi filiform. . . . Anthribide. 
Palpi conical . Scolytide. 
B. Rostrum long. 
Antenne not elbowed . : Brenthide. 
Antenne elbowed . Curculionde, 
