XV, 4 
Oshima: Formosan Termites 
331 
with a much larger head, measuring 0.91 to 0.94 millimeter 
long and 0.88 to 0.91 millimeter broad; while the latter has a 
smaller head, measuring 0.84 to 0.91 millimeter long and 0.84 
millimeter broad. This distinction between the two forms is 
observable in the earlier stage when the larvae are provided with 
11 -jointed antennae. 
Nymph of royal form. — Head, thorax, and abdomen milk 
white; eyes nonpigmented; head and pronotum sparingly pilose; 
wing pads with a few short hairs; abdominal tergites densely 
covered with minute hairs. 
Head round, slightly broader than long; fontanelle spotted, 
round and white, situated at center of head; eyes round and 
prominent; ocellus separated from eye by a distance equal to its 
diameter; postclypeus short, anterior border nearly straight, 
shorter than posterior; anteclypeus as long as postclypeus, with 
rounded anterior border; labrum tongue-shaped, sides slightly 
converging posteriorly, tip and cutting margin of mandibles 
dark brown; antennse 19-jointed, second joint longer than third, 
fourth joint nearly as long as second, semidivided; pronotum 
semicircular, anterior border concave, posterior border indented 
at middle, anterolateral corners rounded; lateral parts of meso- 
notum and metanotum much produced posteriorly, forming primi- 
tive wing cases, which are provided with rudimental veins. 
Measurements. 
Length of body 
Length of head 
Width of head 
Width of pronotum 
Length of pronotum 
THE FOUNDATION OF A NEW COLONY 
In Formosa the swarming of Coptotermes formosanus takes 
place at the end of May or early in June, while in Japan proper 
the winged individuals swarm a little later; that is, at the end 
of June. 
Table I . — Records of the swarming season of Coptotermes formosanus. 
Year. 
Formosa. 
Japan proper. 
1912 
No record .. . . . ... 
June 12 to 19; at Marugame. 
1913 
June 1; at Taihoku 
June 26; at Mitajiri. 
1914 
June 3; at Taihoku _ 
June 25; at Gifu. 
1915 
June 1; at Taihoku __ 
No record. 
1916 
June 4; at Taihoku 
Do. 
j 1917 
June 8; at Taihoku _ 
Do. 
8.50 
1.15 
1.31 
1.40 
0.93 
