XV, 4 
Oshima: Formosan Termites 
329 
3. Larva of worker, derived from 1. Large-headed and provided with 
clearly denticulated mandibles, the tip and the inner margin of 
which are more or less brown. 
4. Larva of royal form, derived from 1. Small-headed; other exter- 
nal characters are similar to those of worker larva. 
5. Nymph of royal form. The members of this caste are provided with 
two pairs of wing pads and one pair of nonpigmented eyes and 
ocelli; body milk white. 
6. Winged forms with pigmented eyes. Body reddish brown. At the 
beginning of May vast numbers of this caste are found in the 
nests; they emerge from the old nest early in June. 
7. A single queen, derived from a female of the winged form. Ab- 
domen greatly enlarged, with two pairs of triangular wing stumps 
on the thorax. 
8. A single king, derived from a male of the winged form. Abdomen 
normal, with two pairs of triangular wing stumps on the thorax. 
9. Substitute royal forms. It is certain that there are several kings 
and queens belonging to this class; however, the substitute king 
is not known. The substitute queen which was collected in Kiushiu 
by Mr. Tatsuo Yoneyama, engineer of the Imperial Railway, is 
12 millimeters long; head yellow, abdomen milk white, thorax with 
no wing stumps. This caste is very rare in the colony of Copto- 
termes formosanus. According to Yoneyama’s information, the 
nest which contained this queen was orphaned and some fifteen of 
the same form were captured at the same time. 
The following are descriptions of young forms, given some- 
what fully: 
Newly hatched undifferentiated larvse. — Head, thorax, and 
abdomen milk white and densely provided with minute hairs. 
Head squarish, sides strongly converging anteriorly, posterior 
border nearly straight, posterolateral corners rounded; antennae 
10-jointed, joints enlarging apically, first joint quadrilateral, 
second joint slightly shorter than first, broader anteriorly, third 
joint semidivided, slightly shorter and narrower than second, 
fourth to sixth joints ring-shaped, seventh to ninth joints spher- 
ical, apical joint elongate, oval, slightly narrowed anteriorly; 
anteclypeus short, its anterior border rounded; postclypeus not 
separated from forehead; labrum tongue-shaped, longer than 
broad, anterior border rounded; mandibles triangular, tip ob- 
tusely rounded, cutting margin of both sides with traces of 
minute teeth; pronotum narrower than head, crescent-shaped, 
posterior border rounded; mesonotum and metanotum broader 
than pronotum. 
Measurements. 
mm. 
Length of body 
1.50 
Length of head 
0.27 
Width of head 
0.52 
Width of pronotum 
0.26 
Length of pronotum 
0.10 
