CECROPS. 
291 
male, and is covered by this lamellar plate entirely, but 
in the female it is very large, nearly half the size of the 
whole body. It resembles a large buckler, swollen out 
laterally, and covers the whole abdomen. The pos- 
terior margin is lobed at the corners, and notched in the 
middle. 
The abdomen is very small in the male, but in the 
female it is of considerable size, two-lobed, and notched 
posteriorly. The caudal appendages are very small, of 
an oval form, and have three or four short hairs springing 
from their inferior margin. 
The antennae are very small, and consist of two short 
articulations. The mouth-apparatus resembles closely 
that of the preceding genus. 
The foot-jaws are three pairs. The first pair is of 
considerable size, consisting of two stout joints, and a 
terminal, strong, sharp claw, deeply tinged with black. 
The second pair is much smaller ; consisting also of two 
joints, and two terminating claws, one much smaller than 
the other, and both of the same colour as the rest of the 
body. The third pair is much the largest, and exactly 
resembles in form and structure the first pair. 
The feet are four pairs. In the male they are all small. 
The first pair consists of two branches, of unequal length, 
arising from a common basal joint, of moderate size. 
Each branch is composed of two short joints, the last of 
which gives off three terminal setae. The internal branch 
is considerably the smaller of the two. The second and 
third pairs have the same structure, only the basal joint 
is in the form of a plate, extending across to each side, 
while the fourth pair, in addition to its having this 
plate larger, has the two branches composed of only one 
articulation each, and this one broader and larger than in 
the preceding. In the female, the first three pairs of feet 
are formed as in the male, the first having a moderate- 
sized basal joint, while the two others have the same 
plate, of which the basal joint is composed, much broader 
and larger. The fourth pair is very large in proportion, 
