200 W. A. SANDS 



Right mandible, apical to first marginal 



(Ra) 007 



Right mandible, first to second marginal 



(R.) oil 



Right mandible, second marginal to molar 



(Rm) 0-04 



The short first marginal tooth of the right mandible is used in the key to the imago 

 caste to characterize A. ateuchestes and A. nanus. It is difficult to use in that 

 this tooth wears more readily than the second marginal and so produces a similar 

 appearance in some other species in which it is normally about equal to the second. 

 Thus in the imago a large specimen of A. polyscolus with worn mandibles may be 

 very like A . ateuchestes. The head pilosity of the latter is uneven, not forming a 

 pelt, whereas A. polyscolus has a very even pelt in most of its range. Other species 

 in which the mandible character may break down are A. amachetus, which has 

 already been discussed under its own heading; and A. cnaphorus which is larger, 

 found in Southern Congo, and has an inconspicuous fontanelle. A. nanus keys 

 out with A. ateuchestes, but is much smaller, with longer apical teeth and an indistinct 

 fontanelle. 



In the worker caste, the spiny enteric valve armature distinguishes A. cnaphorus, 

 A. nanus and A. polyscolus. A. improelatans is larger with a shorter mixed segment. 

 A. hemerus is much larger. A. improcinctus is smaller with longer mandibular 

 apical teeth. A. cicur has more conspicuous head capsule setae. A. disluctans is 

 indistinguishable except for a very slightly more swollen fore tibia, but is East 

 and Central African in distribution. The abdomen of the worker appears to be 

 dehiscent in A. ateuchestes. 



Holotype <$ imago, three paratype £ imagos and workers from type-colony, 

 Gambia: ii m. from Bathurst on Yundum Road, 12. ix. 1966 (W. A. Sands, coll. 

 No. S.2848) in British Museum (Natural History). 



The single nest-series was found in a wide, rather flat, fairly hard mound without 

 well defined structure on dark sandy grey soil in open bush. 



Anenteotermes cicur sp. n. 



(Text-figs 514-517 & 530-535) 



Imago. Head capsule dark sepia-brown, darker above ocelli; fontanelle about half size of 

 ocellus, oval, slightly depressed, pale brown; medial spot short oval, half as large as fontanelle, 

 slightly but distinctly raised into small bump clearly visible in profile, sepia-brown; postclypeus 

 sepia-brown, labrum brown; frontal marks flat sepia-brown crescents; antennae yellow-brown. 

 Pronotum sepia-brown, meso- and metanota brown, transverse suture absent on meso-, weakly 

 developed on metanotum; femora and tibiae pale yellow-brown, tarsi yellow. Abdominal 

 tergites sepia-brown, dorsal stigmata darker; sternites yellow-brown, paler in middle, ventral 

 stigmata sepia-brown; cerci yellow. 



Posterior margin of head capsule slightly undulating, not evenly rounded; ocelli medium- 

 sized, separated from compound eyes by less than half up to two -thirds own least diameter; 

 postclypeus rather weakly inflated, Pcl/W, 0-25-0-26, posterior margin somewhat indistinct, 

 widely rounded, median suture almost absent, apical teeth of mandibles short, La/Li, 0-49-0-50, 



