278 The Philippine Journal of Science isia 



Worker. — Head pale yellow, antennae 16-jointed, the 2d joint 

 as long as the 3d and 4th taken together, the 4th ring shaped; 

 pronotum as in soldier, decidedly narrower than head. 



Localities. — Botel Tobago Island (Oshima coll.; June 18, 1911). 

 Types in the Institute of Science, Government of Formosa. Tai- 

 hoku, Hoiisha, Kankao, Formosa (Oshima coll.). 



Remarks. — The head of the soldier is considerably narrower 

 in L. flaviceps than in L. speratus. In my specimens of the 

 former the ratio of head length to width is 1 : 0.60-0.62, while in 

 the latter it is 1:0.62-0.70. Further, in the soldier of flaviceps 

 the posterior border of the protonum is straight instead of being 

 emarginate in the middle as in speratus. 



A large number of Leucotermes collected by me in Taihoku, 

 Horisha, and Kankao (Formosa) seem, as the result of com- 

 parisons, to be referable to the present species. This species 

 is very closely related to L. speratus, and Holmgren and 

 Yano have expressed the belief that the two should be united. 

 Indeed, with the large series of the imago on hand, I have found 

 it scarcely possible to draw a fast line between them. However, 

 if we compare the soldiers, there exist some points of difference 

 which seem to justify the separation of the two forms. Thus 

 the soldier of the above-mentioned species has a head consider- 

 ably narrower than that of speratus, and the middle of the pos- 

 terior border of its pronotum is nearly straight instead of being 

 clearly emarginated as in speratus. 



Family METATERMITID^ Holmgren 



Genus ODONTOTERMES Holmgren 



Subgenus Cyclotermes Holmgren 



12. Odontotermes (Cyclotermes) formosana (Shiraki). 



Termes formosana Shiraki, * Trans. Ent. Soc. Jap. (1909) 2, 234; 

 Oshima, * Report Term. Ill (1912), 81, PI. 1, figs. 7, 26, 27, PI. 2, 

 figs. 11, 18. 



Termes vulgaris Shiraki, * Trans. Ent. Soc. Jap. (1909), 2, 233; 

 Oshima, * Report Term. I (1909), 37, figs. 9, 10; * Zool. Mag. 

 Tokyo (1910), 22, 379; Matsumura, Die schadl. und niitzl. In- 

 secten v. Zuckerrohr Formosas (1910), 2, PI. 1, figs. 2, 3, 4; Shi- 

 raki, * Special Report Agr. Exp. Station, Formosan Govt. (1910), 

 No. 1, 1, PI. 14, fig. 6; Oshima, * Report Term. II (1911), 7. 



Termes vulgaris ? Nawa, * The Insect World (1911), 15, 281, PI. 15. 



Odontotermes formosanus Holmgren, Annot. Zool. Jap. (1912), 8, 127. 



Odontotermes {Cyclotermes) formosanus Holmgren, Termitenstudien 

 (1910), 3, 38. 



