326 
Philippine Journal of Science 
Measurements of the worked'. 
1919 
mm. 
Length of head 
4.00 
Width of head 
1.03 
Width of pronotum 
0.69 
Distribution. — Formosa (Taihoku, Horisha, and Koshun) ; 
Kotosho (Botel Tobago Island). 
Remarks. — The present species is very closely related to Leuco- 
termes speratus, from Japan proper. It is very hard to draw 
a fast line between the imagoes of the two species; however, 
the soldiers of the two species distinctly differ as follows: 
a 1 . Head narrow and long, 1.75 to 1.81 millimeters long, 1.03 to 1.09 milli- 
meters broad; lateral borders of head straight and parallel; posterior 
border of pronotum nearly straight L. flaviceps. 
a 2 . Head rather broad and short, 1.56 to 1.71 millimeters long, 1.06 to 
1.09 millimeters broad; lateral borders of head convex, slightly con- 
verging anteriorly; posterior border of pronotum clearly indented 
at middle L. speratus. 
In addition, the swarming seasons of the two species are 
quite different. The winged forms of L. flaviceps swarm in the 
beginning of January, while those of L. speratus swarm in April 
or May. 
Family METATERMITIDJE Holmgren 
Genus ODONTOTERMES Holmgren 
Odontotermes (Cyclotermes) fomosanus (Shiraki). Plate I, figs. 
4 to 6. 
Termes formosana Shiraki, Trans. Ent. Soc. Jap. 2 (1909) 234; 
Oshima, Rep. Term. 3 (1912) 81, pi. 1, figs. 7, 26, 27; pi. 2, figs. 
11, 18. 
Termes vulgaris Shiraki, Trans. Ent. Soc. Jap. 2 (1909) 233; Oshima, 
Rep. Term. 1 (1909) 37, p!., figs. 9, 10; Zool. Mag. Tokyo 22 (1910) 
379; Rep. Term. 2 (1911) 7; Matsumura, Schadl. u. Niitzl. Insekt. 
v. Zuckerrohr Formosa (1910) 2, pi. 1, figs. 2-4. 
Odontotermes ( Cyclotermes ) formosanus Holmgren, Termitenstudien 
3 (1910) 38; Termitenstudien 4 (1913) 116, pi. 4, fig. 11; pi. 5, 
fig. 11; Hozawa, Journ. Coll. Sci. Tokyo 35 (1915) 105, pi. 3, figs. 
21-23, text figs. 26-28. 
Odontotermes formosanus Holmgren, Annot. Zool. Jap. 8 (1912) 127. 
Odontotermes ( Cyclotermes ) formosana Oshima, Philip. Journ. Sci. 
§ D 8 (1913) 278. 
Imago. — Head, thorax, and abdomen chestnut ; anteclypeus 
yellowish white; antennse, labial palpi, T-shaped marking and 
anterolateral corners of pronotum, and legs brownish yellow; 
