46 The Philippine Journal of Science 1921 
about half as wide as long. Pronotum narrower than head, 
arched, about half as long as broad, and distinctly elevated ante- 
riorly, anterior border deeply concave, thickened, edged with 
black and slightly rugose, anterolateral corners rounded laterally, 
marked anteriorly by a distinct notch and by rugosities; lateral 
margins nearly straight, converging toward the posterolateral 
corners which round into the slightly convex posterior border. 
Measurements of Planocryptotermes nocens sp. nov., soldier. 
mm, 
Body length * 4.25 —4.60 
Body length, without the head 3.50 —4.10 
Head length: 
Posterior margin to middorsal margin of frontal 
area 1.25 -1.85 
Posterior margin to labral suture 1.50 
With the mandibles 2.20 —2.25 
Head width 1.12 ~1.25 
Pronotum width 1.00 —1.00 
Pronotum length 0.575—0.625 
* Made from preserved specimens. Possibly much longer in life. 
“Larva.’’—Reaching a length of about 5 millimeters. One of 5 
millimeters shows 12 segments in the antennz. Slender, thorax 
much slenderer than abdomen which is long, swollen posteriorly, 
and colored a yellowish brown by the wood particles and protozoa — 
of the gut. A larva of 1.85 millimeters shows antenne of 10 
segments, segments 3, 4, 5, and 6 being rudimentary. 
Nymph.—Similar to “larva” in general appearance but reach- 
ing larger size; having wing pads in various stages of develop- 
ment and distinct, gray, compound eyes. One about 6 millimeters 
in length shows 17 segments in the antennz, 4 of them still 
rudimentary. 
SYSTEMATIC POSITION 
This species differs from Calotermes pinangae (Haviland), the 
only other described species of the genus, among other points, 
in the toothing of the mandible and in the greater length and 
breadth of the head and pronotum. 
DISTRIBUTION AND BIOLOGICAL NOTES 
House termites, living in boards in houses, furniture, picture 
frames, etc. More extensive collecting is necessary to deter- 
mine the relative prevalence of the different species of this 
genus. My collection contains several closely related new species 
which I plan to describe in a future number of these notes. 
