8 W. A. SANDS 



frontal view of the face, and the length of fore wing includes the stump; in the 

 soldier, head width is the greatest width of the head capsule, and depth of head 

 capsule is taken in profile, excluding the postmentum and measuring vertically from 

 the lower margin to the highest point of curvature of the head capsule, wherever it 

 occurs. The measurements are given in abbreviated form in the keys, as follows : 



Head width (across eyes in imago), W; Head length to tip of nose, L; Depth of 

 head, D; Length of hind tibia, T 3 ; Greatest diameter of eye, E; Ocellus, O. 



In describing colouration, a limited number of terms are applied as consistently 

 as possible according to an arbitrarily decided scale of intensity from white (un- 

 sclerotized) to pitch black, as follows: 



white 



yellow-white 

 pale yellow 

 yellow 



1 



(with reddish tinge) 



(without reddish tinge) 



orange-yellow 



pale yellow-brown 



orange 



yellow-brown (or very pale brown 





if without yellow) 



ferruginous orange 



pale brown 



ferruginous 



brown 



chestnut brown 



sepia brown 



dark chestnut brown 



dark sepia brown 



very dark chestnut brown 

 1 



very dark sepia brown 

 1 



pitch black 

 VEGETATION MAP 



A map is provided of the vegetation zones mentioned in the text. It is based on 

 the vegetation map of Africa south of the Tropic of Cancer prepared for UNESCO 

 by Keay et al. (1959), differing in that only the boundaries that are known to have 

 significance in termite distribution are indicated (Map 2). 



Subfamily NASUTITERMITINAE Hare 



Nasutitermitinae Hare, 1937 : 4^2. Type-genus, Nasutitermes Dudley, 1890. 



Imago. Labrum broader than long, without transverse sclerotized band, tip partly hyaline ; 

 mandibles with apical tooth slightly shorter to distinctly longer than first marginal, left third 

 marginal with anterior edge at most only slightly longer than posterior (up to ij times) ; 

 fontanelle commonly slit-like, often bifurcate, sometimes nearly obsolete. Tibial spurs 

 2:2:2 (Syntermes with 3 : 2 : 2, is not African). Styli absent. 



Soldier. Head capsule modified to form a proboscis terminating in opening of frontal gland ; 

 mandibles reduced to vestiges, with or without " points ". Tibial spurs, 2 : 2 : 2. Styli 

 absent. 



