SmUUTCriiE and biology oe schizoneuea lanigeea. 669 
The antennae (fig. 4) are composed of six articles, of which 
the third article is conspicuously longer than the others. 
The two proximal articles are about equal in length, the basal 
one being .slightly broader. The third article is cylindrical 
in shape, and almost as long as the three distal articles 
together. The fourth and fifth articles are slightly broader 
distally, and the terminal one attenuates abruptly at the distal 
end, forming a. short, blunt process, which bears a few sen- 
sory hairs. Each of the two distal articles bears a sense 
organ (.s. o.), which consists of a circular pit, surrounded by a 
ring of sensory hairs. A few hairs ai’e scattered over the 
.surface of the articles. 
There are no compound eyes such as are found in the winged 
viviparous stage. Two small eyes, each consisting of three 
tubercles, are borne behind the anleunce, one on each side of 
the head. As seen in section (fig. 49), they consist exter- 
nally of three tmusparent convex tubercles, beneath which 
are grouped, in close contact, three densely pigmented areas 
[am.) These areas are somewhat pear-shaped, the long- axes 
being at right angles to the surface of the head, and the 
tapering portion internal. A delicate strand of nerve-fibres 
(oc. n.) passes from each eye towards the brain. The 
apterous viviparous female is sluggish in habits, living in the 
dark cracks of galls or imbedded amongst the members of 
the colony, which accounts for the poorly developed eyes. 
The Thorax and Ambulatory Appendages. — Each 
of the thoracic segments bears on its dorsal surface four 
groups 6f wax-secreting glands, and on its ventral surface 
a pair of legs. Situated on the ventral surface of the pro- 
thorax, near its posterior border, are the two pro-thoracic 
spiracles (p. b\). Two meta-thoracic spiracles (m. s.) are 
situated near the anterior border of the meta-thorax. 
The legs are composed of five articles — a small basal article 
or coxa {cox.), a short cylindrical ti’ochanter [tro.), the 
femur (/e.), tibia {ti.) and tarsus {ta.). 
The femur is elongate and slightly broader distally. The 
tibia is elongate and of uniform thickness. The distal article 
