xv. 4 Oshima: Formosan Termites 325 



by many short branches, cubitus with about ten branches, not 

 reaching- tip of wing, its tip anastomosing and connecting with 

 median nerve. 



Measurements of the imago. 



mm. 



Length of body with wings 9.00 



Length of body without wings 4.50 



Length of head 1.03 



Width of head 1.00 



Width of pronotum 0.90 



Length of pronotum 0.59 



Length of anterior wing 8.00 



Soldier. — Head yellow ; mandibles reddish brown ; thorax and 

 abdomen yellowish white ; antennae and legs straw-colored ; head 

 moderately pilose, thorax densely provided with short, spiny 

 hairs; abdominal tergites densely pilose. 



Head cylindrical, posterior border rounded, anterior border 

 nearly straight, sides straight and parallel; clypeus very short, 

 indistinctly separated from forehead; labrum lancet-shaped, tip 

 whitish, scarcely reaching middle of mandibles ; mandible saber- 

 shaped, tip incurved, cutting margin smooth; antennae 14- to 

 16-jointed; third joint smallest, nearly half as long as second; 

 fourth joint slightly shorter than second; fontanelle indistinct; 

 pronotum heart-shaped, anterior border bilobed, posterior border 

 nearly straight, sides converging posteriorly, mesonotum and 

 metanotum narrower than pronotum. 



Measurements of the soldier. 



mm. 



Length of head 5.00 



Length of head with mandibles 2.50 



Length of head without mandibles 1.75 



Width of head 1.03 



Width of pronotum 0.78 



Length of pronotum 0.47 



Worker. — Head yellowish white; thorax, abdomen, antennae, 

 and legs whitish; head, thorax, and abdominal tergites densely 

 pilose. 



Head round, slightly widening anteriorly; length of post- 

 clypeus less than half its width; antenna? 14-jointed, second 

 joint nearly as long as third, fourth joint as long as third; 

 pronotum narrower than head, anterior border bilobed, slightly 

 raised, posterior border nearly straight, sides converging pos- 

 teriorly; mesonotum nearly as broad as pronotum; metanotum 

 much broader than mesonotum. 



