19, 1 Inght: Notes on Philippine Termites, II 55 
Cotypes.—No. 150 of general collection (McGregor and Light) - 
Rizal Province near Rizal-Bulacan boundary on Manila-North 
Road, September 29, 1920. 
DIAGNOSIS 
Adult—Same as P. luzonensis but darker brown in color. 
Wings not known. 
Soldier —Like P. luzonensis but smaller, slenderer, lighter in 
color, head smaller, antenne of 15 or 16 segments, segments 
longer and slenderer than in P. luzonensis; compound eyes ves- 
tigial only, not protruding as in P. luzonensis; pronotum much 
smaller than in P. luzonensis. 
Worker.—Smaller, slenderer, lighter, antennz of 15 segments. 
DESCRIPTIONS 
Adult (deélated) .—Agrees very closely with P. luzonensis; 
color above generally darker brown, possibly due to greater age 
of this specimen which has made its flight while those of P. lu- 
zonensis were taken from the nest in the winged state. Ante- 
rior wing scales very broad, posterior ends overlapping in the 
midline (possibly an abnormality). 
Large soldier.—_tn general like P. luzonensis but body smaller, 
about the size of the small soldier of P. luzonensis, slenderer, 
lighter in color, and less heavily chitinized ; head smaller, 
pale yellow posteriorly but mandibles as dark as in P. luzo- 
nensis; mandibles as long as or longer than in P. luzonensis 
but slenderer ; antennz with 16 segments, third obconic, usually 
distinctly larger and more heavily chitinized than second or more 
distal segments; other segments longer and slenderer than in P. 
luzonensis ; compound eye vestigial, not protruding at all, repre- 
sented by a vague white area invisible except under microscope; 
anteclypeus extremely short ; narrowest part of gula more pos- 
terior than in P. luzonensis; pronotum smaller in proportion 
than in P. luzonensis. 
Measurements of Prorhinotermes gracilis sp. nov., large soldier. 
mm. 
Body length 5.75-6.00 
Head length, with mandibles 2.30—2.50 
Head length, without mandibles 1.50-1.60 
Head width: 
Maximum 1.25-1.30 
Minimum 0.90 
Pronotum width 1.00-1.05 
Pronotum length 0.45—0.48 
