19, 1 Light: Notes on Philippine Termites, II 29 
lying flat; if measured with the head on one side, from the 
external articulation of the mandibles to the posterior margin 
of the head. 
Head width.—Measured at the widest point, including eyes 
when present. Considerable confusion has arisen from a care- 
less use of this measurement! 
Fontanelle index.—Distance from the posteriormost part of 
the head in the midline to the fontanelle divided by the length 
of the head without mandibles. I plan to use this value in 
certain species because of the indefiniteness which I have en- 
countered as to the meaning of such statements as: “Fonta- 
nelle at middle of head,” “‘Fontanelle in front of the middle of 
the head,” etc. 
Pronotum width—Measured at the widest point. 
Pronotum length—Measured in the midline and hence the 
minimum length in species with notched pronotum. I suspect 
that this term is used by some writers, without explanation, to 
mean maximum pronotum length. 
Family KALOTERMITIDA Banks 
Protermitide Holmgren. 
Genus KALOTERMES Hagen sensu restricto 
Subgenus Calotermes sensu stricto Holmgren. 
DIAGNOSIS 
Adult—Median vein of the forewing runs parallel to the 
cubitus and midway between it and the radial sector, simple or 
branched. Antennz with 16 to 19 segments. 
Soldier—Head relatively large, elongate, arched, gradually 
flattened anteriorly ; mandibles large, toothed but unsymmetrical, 
all femora enlarged. Antenne with 13 to 18 segments, the 
third typically enlarged, modified, and highly chitinized. Similar 
to soldiers of Neotermes. 
The species of Kalotermes are to be found living in the dead 
branches of living trees, in the dead wood of hollow or injured 
trees or, in some cases, in or very near the live wood. They have, 
therefore, the same habitat as the species of the closely related 
genus Neotermes. They form small colonies of at most a few 
hundred individuals consisting chiefly of larvalike “workers,” 
a few nymphs of supplementary reproductive forms, and a few 
soldiers. 
Kalotermes seems to have its greatest development in the 
Nearctic Region where Banks has reported nine species. It 
