19,1 Light: Notes on Philippine Termites, II 45 
where it is laterally deflected and continuous with the posterior 
margin of the foveola. On either side of the mouth parts on the 
ventral side of the héad is a dark narrow ridge (the edge of the 
ventral gena) running forward and laterally to culminate in a 
laterally flattened spinelike projection (“antennal spine”) of 
the anteroventral margin of the antennal foveola; above this the 
anterior margin is reduced, giving the appearance of a deep notch 
internal to which the anterodorsal margin projects as a broader, 
still more prominent “spine.” 
Lying between and above the antenna and the mandible of each 
side is a pair of rounded elevations, the outer slightly more dorsal 
than the inner. Concavity of frontal area shallow and its sur- 
face smoothly rugose; mandibles distinctly thickened basally with 
a lateral hump, distal three-fourths slender in side view and con- 
siderably flattened dorsoventrally ; left mandible less curved than 
right and bearing three teeth, the distal two small and the prox- 
imal one long and low; right mandible more strongly curved, 
with two teeth, the distal one large, with distal edge at right 
angles to mandible and proximal edge long, making a very obtuse 
angle with surface of mandible; proximal tooth of right mandible 
low and inconspicuous; large distal tooth of the right side fits in 
between the two distal teeth of left mandible when mandibles are 
closed, tip of the right mandible crossing under that of the left 
which projects beyond it; labrum white in color, projecting over 
the proximal half of the opened mandibles, narrow, converging 
distally with a distinct rounded point bearing two long, upcurved 
hairs at its tip with several smaller hairs just posterior to them. 
Antennz considerably longer than height of head, 13- or 14- 
segmented; when 13, the third obconic and nearly as long as the 
second; when 14, the third segment divided to form a short 
obconic third and a short disk-shaped fourth; first segment cylin- 
drical, longest and thickest; first, second, and third heavily chiti- 
nized ; first one or two beyond the third less so and the remainder 
very lightly so; first one or two segments beyond the third often 
nearly disk-shaped, the three beyond these become increasingly 
long, the proximal end more distinctly narrowed and stalked, the 
distal end more rounded (that is, spherical) beyond which, with 
exception of last, they are similar and may be described as short, 
thick clubs with narrow stalks and thick rounded distal regions; 
last two segments oval, somewhat longer and considerably nar- 
rower than preceding segments, the last only about two-thirds as 
wide as the next to the last. Gula small, weakly chitinized and 
