*v.« Oshima: Formosan Termites 329 



3. Larvae 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. Larvae of royal form, derived from 1. Small-headed; other exter- 



nal characters are similar to those of worker larvae. 



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 kin^s 



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 fonnosanus. 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 larvx. — 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; antenna 1 

 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 



