xv, 4 Oshima: Formoswn Termites 323 



mandibles; antennae 17-jointed, second to fourth joints equal in 

 length; pronotum semilunar, anterior border bilobed, posterior 

 border clearly indented at middle, anterolateral corners rounded ; 

 mesonotum and metanotum much broader than pronotum, their 

 posterior borders nearly straight, their posterolateral corners 

 strongly projected posteriorly, forming rudimental wing pads ; 

 abdomen more or less enlarged, chitinous plates crescent-shaped. 



Measurements of the substitute queen, 



mm. 



Length of body 12.00 



Length of abdomen 9.00 



Width of abdomen 3.50 



Length of head 1.25 



Width of head 1.34 



Width of pronotum 1.25 



Length of pronotum 0.78 



Substitute king. — Unknown. 



Soldier. — Head yellow ; mandibles dark brown ; labrum brown- 

 ish yellow; antennae somewhat paler; pronotum pale yellow; 

 abdomen and legs pale straw color; head coarsely pilose; tho- 

 racic plates hairy ; abdominal tergites densely covered with short 

 spiny hairs. 



Head suborbicular, posterior border rounded, sides arcuate, 

 strongly converging anteriorly; fontanelle distinct, opening 

 directed forward, situated just behind the base of postclypeus; 

 antennae 15-jointed, second joint quadrate, longer than third, 

 the latter narrowest and shorter than fourth; mandibles saber- 

 shaped, slender, with incurved, piercing tip, cutting edge tooth- 

 less, labrum lancet-shaped, tip hyaline, reaching middle of 

 mandible; anterior border of anteclypeus slightly convex; post- 

 clypeus very short, not separated from forehead ; pronotum sub- 

 reniform, narrower than head, anterior and posterior borders 

 slightly bilobed, lateral borders rounded, converging posteriorly ; 

 mesonotum oval, the former slightly narrower than pronotum. 

 while the latter is broader. 



Measurements of the soldier. 



mm. 



Length of body 5.00 



Length of head with mandibles 2.37 



Length of head without mandibles 1-56 



Width of head 1-18 



Width of pronotum 0.84 



Length of pronotum 0-50 



Worker. — Head, thorax, and abdomen milk white, densely 

 covered with short spiny hairs. 



