19,1 Light: Notes on Philippine Termites, IT 31 
little at either end and are marked by the apparent absence of 
eyes and by the presence of a hyaline spot near the antenne (see 
text fig. 1). Mandibles (see Plate 1, fig. 1) short, stout, with a 
very distinct upcurve, and slightly incurved tips; their outer 
surfaces show a low basal hump, a slight concavity in the center, 
and a convexity near the distal end; left mandible a little longer 
than right, with three teeth on cutting edge; distal tooth double 
and extended distally, second triangular, somewhat truncated 
distally with a low posterior projection confined to the dorsal 
region of the mandible; basal tooth large and bluntly triangular ; 
right mandible with two triangular teeth, with short distal and 
long proximal faces; proximal region of mandible roughened. 
Labrum about twice as broad as long, reaching to the anterior 
border of lower tooth of right mandible, parallel-sided, with 
slightly rounded anterolateral corners and a slightly convex an- 
terior margin bearing a number of bristlelike hairs. 
Antenne with 15 to 17 segments, first segment large, cylin- 
drical, and nearly hidden from above by the projecting dorsal 
margin of the antennal foveolze; second short and cylindrical, 
third large and heavily chitinized, obconic with a proximal diam- 
eter less than that of the second segment; next six obconic but 
short and thick; more distal segments thickly clavate and lightly 
chitinized, apical segment oval, white. Eye hyaline and sepa- 
rated by less than its diameter from edge of antennal foveola 
(not discernible in long-headed soldiers) ; gula short and broad, 
anterior region but little less than twice as wide as narrowest 
portion. Legs short, femora swollen; pronotum large and con- 
siderably broader than head, much arched, making nearly a 
semicircle in transverse section; anterior border not notched in 
midline but deeply concave, the rounded anterior corners project- 
ing far over the posterolateral regions of head; median long- 
itudinal line distinct; broadest point of pronotum in line with 
the center of anterior border; lateral border receding to meet 
the nearly straight, weakly arcuate, posterior border; anterior 
margin slightly upraised and marked by a dark brown edge; 
mesonotum and metanotum short, mesonotum about two-thirds 
as long as pronotum, with notched posterior border, metanotum 
shorter than mesonotum. Body distinctly flattened, thoracic re- 
gion as long as the abdomen in dorsal view; abdominal tergites 
chitinized. Practically all soldiers collected show wing pads 
varying in size. 
