WINGLESS REPRODUCTIVE TYPE OF TERMITES 613 
The lack of woody contents in the intestinal sac, or caecum, 
may be interpreted that the soldiers are fed by the workers and 
do not masticate wood. This may also be inferred from the 
structure of the mandibles, which are not adapted to biting, 
and are used rather to threaten an approaching enemy. A 
familiar motion, when the soldier is approached by a pencil or 
needle, is to raise the mandibles and wave them defiantly. 
PRORHINOTERMES SIMPLEX HAGEN 
In the United States this termite occurs only on the keys, 
along the sea coast, and in the interior of southern Florida; it 
is also found in Cuba and Jamaica. Its nests are in dead standing 
trees and in logs, but never in the ground. Considerable moisture 
is necessary for life, and this is also true of the species of Reticuli- 
termes and Termopsis. P. simplex is injurious to piled lumber 
and to any timber which is kept moist by contact with the earth. 
In the normal Florida colony of P. simplex four castes are of 
common occurrence, three of which have been collected in both 
the nymphal and adult conditions—the wingless third form, the 
worker, and the soldier—and one which is immature, a nymph 
of the second form with wing pads of very unusual shape. This 
nymph undoubtedly reaches maturity, but it has not yet been 
recognized in the adult state. One phase of a fifth caste, the 
deiilated adult of the first form, is of fairly common occurrence 
in young colonies, but they have not yet been found in the winged 
phase, nor is there any record of the swarming of this species 
in Florida, possibly for lack of observations, since in near-by 
Cuba the first-form adults of P. simplex are known to swarm 
during the last of October. No first-form nymphs of P. simplex 
of the usual type, 1.e., with long wing pads, have yet been found 
in Florida, but such nymphs are known in Jamaica. On the 
other hand, no adult second forms with fused wing pads, like 
those of the above-mentioned second-form nymph found in 
Florida, have been found in Cuba and Jamaica. A plausible 
explanation might be that the nymphs with peculiar fused wing 
pads are unusual first-form nymphs and later become the deilated 
adults, but a careful examination of these two forms shows that 
they belong without doubt to two different castes. 
