286 The Philippine Journal of Science 1913 



terior angles broadly rounded; mesonotum and metanotum 

 agree with those of the larger form soldier. 



Measuremeni. Mm. 



Length of head with mandible 3.29 



Length of head without mandible 2.28 



Width of head 1.97 



Length of pronotum 0.98 



Width of pronotum 1.47 



Length of body 6.79 



Worker {larger form). — Head pale yellow, round, dorsally 

 slightly vaulted and with a pale f ontanelle spot ; epistome mark- 

 edly swollen, along its posterior border a semilunar concavity; 

 antennae 18-jointed, longer than head; 2d and 3d joints cylindri- 

 cal, subequal; 4th joint very small; pronotum half as long as 

 broad, divided into 2 portions by a transverse furrow, with 

 anterior border elevated, and forming a right angle with 

 dorsal surface, bilobed in the middle area ; anterior angles acutely 

 rounded; lateral margins posteriorly strongly converging; pos- 

 terior angles broadly rounded ; middle of posterior border emar- 

 ginate ; mesonotum narrower than pronotum, quadrangular, with 

 convex lateral margins ; metanotum very large, semilunar, mark- 

 edly broader than mesonotum, with rounded lateral margins; 

 abdomen oblong-ovoid; abdominal papillae short. 



Measurement. 











Mm. 





Length of head 

 Width of head 











1.88 

 1.84 





Length of pronotum 

 Width of pronotum 

 Length of body 











0.50 

 1.03 

 5.50 





Worker {smaller form). 



Head 



pale 



yellow, 



round, 



with 



slightly vaulted dorsal surface; 



antennae 



17-jointed; 2d 



joint 



cylindrical, longer than 3d. 















Measurement. 











Mm. 





Length of head 

 Width of head 











1.16 

 1.19 





Length of body 











4.00 





Habitat. — Singapore. 



Remarks. — The nearest relative of this species appears to be 

 Termes {Macrotermes) gilvus Hagen, but the two species differ 

 widely in the shape and dimensions of the thoracic segments in 

 the same castes of each. 



