322 
Philippine Journal of Science 
1919 
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. 
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. 
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; 
antennae 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 
