718 
RHYNCHOTA. 
Psyllidce. 
Phytophthires 
Aphidce 
Aleurodidce. 
Coccidce . 
The wings at an angle over the body, 
two pairs. Three ocelli, long thin 
antennae. 
Siphons usually present. Often wing¬ 
less. Wings held erect, hyaline. 
Wings four, mealy, opaque. 
Female wingless, male usually winged 
with one pair of wings only. 
ClCADIDiE. 
Three ocelli in a triangle on the vertex. Tarsi with three- 
joints. Male with a musical apparatus. 
The Cicadas are the largest insects of the Homoptera, with an expanse 
of one to several inches. They are readily recognised by the ocelli 
if not at once from the general 
form. The head is well develop¬ 
ed, with short antennae consisting 
of a bristle set on a basal joint. 
The wings are large, often col¬ 
oured and lie at an angle over the 
abdomen. The eyes are well 
developed, as is the beak which 
lies under the head ; the thorax 
is well developed, the mesonotum 
large and conspicuous. The ab¬ 
domen is broadly joined to the 
thorax ; the female has a distinct 
ovipositor ; the male has the base 
of the abdomen modified to form 
sound producing organs, with 
more or less distinct external flaps which are valuable for the discrimina¬ 
tion of species. The legs offer no peculiarities and are formed for clinging 
while the empodium is absent. 
Very little is known as to the life-history of Indian species. The 
eggs of some foreign species are known to be laid in bark. The nymphs 
have been found, at the roots of plants and in termites’ nests, but no¬ 
thing is known of their habits in India. When full grown, the nymphs 
come up from the ground, fix themselves on a plant, and the adult 
Fig. 494. — COSMOPS A LTRIA SA T T JR AT A , 
Thorax and head above ; apex of 
abdomen of female below. 
