xv. 4 Oshima: Formosan Termites 321 



Formosa; Mr. Tetsukichi Katayama, chief of the chemical de- 

 partment of the same institute; and Mr. Saichi Tasaki, my 

 assistant, I have carried on my investigations and very fortu- 

 nately have gained some satisfactory results, which are recorded 

 in the following pages. Here I wish to express my sincere 

 thanks for the courtesy shown by those gentlemen and to Dr. 

 Tomoe Takaki, former director of the above-mentioned in- 

 stitute, through whose most courteous assistance I have been 

 able to continue my work for. so many years. 



DESCRIPTIONS OF THE FORMOSAN TERMITES INJURIOUS TO WOODEN 



STRUCTURES 



Family MESOTERMITID^] Holmgren 



Subfamily COPTOTERMITIN^E Holmgren 



Genus COPTOTERMES Wasmann 



Coptotermes formosanus Shiraki. Plate I, figs. 1 to 3. 



Coptotermes formosanus Shiraki, Trans. Ent. Soc. Jap. 2 (1909) 

 239; Oshima, Rep. Term. 1 (1909) 33, pi. 1, figs. 1-3; pi. 2, figs. 

 11, 12; Rep. Term. 3 (1912) 75, pi. 1, figs. 8, 28; pi. 2, figs. 3, 

 21; Philip. Journ. Sci. § D 8 (1913) 276; Rep. Term. 4 (1914) 

 2; HOLMGREN, Termitenstudien 4 (1913) 76, pi. 2, fig. 10; Hozawa, 

 Journ. Coll. Sci. Tokyo 35 (1915) 92, pi. 3, figs. 18-20, text figs. 

 22-25. 



Coptotermes gestroi Oshima, Zool. Mag. Tokyo 22 (1910) 376; Rep. 

 Term. 2 (1911) 5; Nawa, Insect World 14 (1910) 597. 



Coptotermes fovmosae Holmgren, Termitenleben auf Ceylon (1911) 

 192; Termitenstudien 2 (1911) 74; Annot. Zool. Jap. 8 (1912) 

 121; Yano, Rep. Jap. For. Exp. Station 9 (1911) 62, pi. 4, figs. 

 12-20. 



Imago. — Head brown; anteclypeus whitish; postclypeus, an- 

 tennae, labrum, and labial palpi brownish yellow; pronotum 

 yellowish brown, with Y-shaped marking; mesonotum, meta- 

 notum, and abdomen pale brown; legs yellow, tibia and tarsus 

 darker; head, thoracic plates, and abdominal tergites densely 

 pilose; wing stumps beset with hairs. 



Head round, fontanelle distinct; antennae 21-jointed, second 

 joint cylindrical, nearly as long as third and fourth taken to- 

 gether; third joint short, ring-shaped; eye round, markedly 

 prominent; ocellus oval, separated from eye by a distance less 

 than its shorter diameter; anteclypeus trapezoidal, narrower 

 than postclypeus, the latter short and slightly swollen; pro- 

 notum semilunar, anterior border concave, posterior border 



