322 Philippine Journal of Science ma 



bilobed, posterolateral corners rounded; mesonotum and meta- 

 notum narrower than pronotum, their posterior borders slightly 

 concave ; wing stumps subequal in size, anterior ones overlapping 

 base of posterior; wings hyaline, costal margin yellowish, veins 

 yellowish at base; wing membrane densely beset with minute 

 hairs, radius nerve of anterior wing parallel to costal margin; 

 median nerve faint, nearer to cubitus than to radius, with no 

 branch; cubitus below middle of wing, not reaching tip, with 

 about seven branches, of which the proximal four are stronger ; 

 median nerve of posterior wing starts from proximal portion of 

 radius. 



Measurements of the imago. 



mm. 



Length of body with wings 14.00 



Length of body without wings 6.00 



Length of head 1.40 



Width of head 1.31 



Width of pronotum 1.31 



Length of pronotum 0.87 



Length of anterior wing 11.00 



Queen. — Head and thorax similar to those of imago; meso- 

 notum and metanotum with a pair of triangular wing stumps; 

 abdomen much enlarged ; abdominal tergites pale reddish brown, 

 separated from each other by a distance about four times as 

 great as its length; abdominal integument milk white. 



Measurements of the queen. 



mm. 

 Length of body 21.00 



Length of abdomen 19.00 



Width of abdomen 5.50 



King. — All the characters agree very well with those of the 

 imago; abdomen not enlarged; thorax provided with two pairs 

 of triangular wing stumps. 



Substitute queen. — Head yellow; postclypeus somewhat paler; 

 anteclypeus whitish; mandibles pale yellow, with brown tips; 

 antennas and legs pale yellow; thoracic plates yellow; abdomen 

 milk white, with pale yellow abdominal tergites; head and 

 thoracic plates very coarsely beset with minute hairs ; abdominal 

 tergites smooth. 



Head round, Y-suture distinct, whitish; fontanelle round, 

 whitish, situated at the center of the suture; eye round, with 

 no pigment, slightly prominent ; ocellus round, whitish, separated 

 from eye by a distance greater than its diameter; postclypeus 

 trapezoidal, more than twice as broad as long; anteclypeus 

 slightly swollen; labrum tongue-shaped, entirely overlapping 



