CONSTITUTION AND DEVELOPMENT OF TERMITES. 261 
either soldier larvee, or larve of perfect insects,—that is, larve 
possessing the first indications or rudiments of wings. 
2. Larve of perfect insects (fig. 3), and nymphs (fig. 4) 
derived from them. 
3. Larve of soldiers (fig. 2), and soldiers (figs. 5 and 
16); the latter derived from the former, and those derived 
from undifferentiated larve, from the larve of perfect insects, 
or from young nymphs. 
4. Perfect insects derived from nymphs (fig. 6). 
5. A royal couple, properly so called, derived from perfect 
insects (figs. 7—11). 
6. Larve of substitute royal forms (fig. 14), and 
substitute forms (figs. 12, 13, and 25) themselves derived 
from the former; those in their turn having originated from 
undifferentiated larve with fourteen or fifteen antennal joints, 
from larvee of perfect insects, or from nymphs. 
To proceed to details: a colony contains newly hatched 
larvee about 1 mm. in length,! with ten antennal joints of 
which nine are pilose, and one not. The glabrous third joint 
is relatively very long, and presents indistinct traces of a 
tripartite division. 'These traces soon become more marked, 
and the separation of the distal joints appears constantly to be 
clearly defined before that between the middle and the proximal 
joints, and possibly may actually precede it. 
As a result we have larve which are a little over 2 mm. in 
length, and exhibit twelve distinct antennal joints, of which 
the 3rd, 4th, and 5th are short and bare. In succession the 
5th joint, as far as I have seen, becomes pilose and relatively 
longer; then the 4th and finally the 3rd exhibit the same 
phenomena. 
We thus obtain examples with twelve antennal joints, all 
pilose; and in the meantime the body increases in size, so that 
such specimens measure about 4 mm. in length. 
The newly born larve are all perfectly alike,—that is, they 
1 In Termitide the length of the individual as a rule has only a relative 
value, as it depends largely on the degree of moisture in the atmosphere, the 
food supply, &c. 
VOL. 39, PART 3.—NEW SER. S 
