THE STUDY OF INSECTS . 
S 06 
DD. Fourth segment of tarsus inconspicuous; organs of spe¬ 
cial sense of antennae diffused. This group contains three 
families, which are so connected by intermediate forms that 
it is not easy to separate them. The following characters 
will aid the student in separating the more typical forms : 
E. Body elongate; antennae almost always long, often as 
long as the body or longer. The larvae are borers, p. 567. 
Cerambycidas. 
EE. Body short and more or less oval; antennae short. 
F. Front prolonged into a broad quadrate beak; elytra 
rather short, so that the tip of the abdomen is always 
exposed. The larvae live in seeds, p. 581..BRUCHID.E. 
FF. Front not prolonged into a beak; usually the tip of 
the abdomen is covered by the elytra. Both larvae and 
adults feed on the leaves of plants, p. 574. 
ChrysomeliDjE. 
CC. Tarsi varying in form, but when five-jointed not of the type 
described under C, the joint between the fourth and fifth seg¬ 
ments being flexible. 
D. Ventral part of the first segment of the abdomen divided 
by the hind coxal cavities, so that the sides are separated 
from the very small medial part. 
E. Metasternum with an antecoxal piece, separated by a 
well-marked suture reaching from one side to the other, 
and extending in a triangular process between the hind 
coxae. 
F. Antennae eleven-jointed ; hind coxae mobile, and of the 
usual form ; habits terrestrial. 
G. Antennae inserted on the front above the base of the 
mandibles, p. 516. Cicindelid.e, 
GG. Antennae arising at the side of the head between 
the base of the mandibles and the eyes. p. 518. 
Carabidas 
FF. Antennae ten-jointed; hind coxae fixed and greatly 
expanded so as to conceal the basal half of the hind 
femora and from three to six of the abdominal seg¬ 
ments; habits aquatic, p. 522.HalipliDjE. 
EE. Metasternum either with a very short antecoxal piece, 
which is separated by an indistinct suture, and which is 
not prolonged posteriorly between the coxae, or without 
an antecoxal piece. 
F. Metasternum with a very short antecoxal piece, p.521. 
Amphizoid^e. 
