74 W. A. SANDS 



Right mandible, second marginal 



to molar (R m ) . . . 006-0-07 



Mesonotum width (M) . . 0-29-0-31 



Metanotum width (N) . . 0-29-0-33 



Worker. Head capsule pale yellow, pilosity yellow, very sparse and inconspicuous. Post- 

 clypeus strongly inflated, Pcl/W, 0-33, Pcl/Ri, 3-01 ; apical teeth of mandibles moderately 

 long, La/Li, 0-72, Ra/Ri, i-oo; subsidiary tooth of left mandible separated from molar pro- 

 minence by distinct notch in surface view, complex ratio, L A /Li.L m , 1441; first marginal 

 tooth of right mandible slightly behind line of apical to second marginal, R A /RiR m , 18-20. 

 Fore tibia scarcely inflated, Ti/T„, 4-73, third apical spur distinct, about one-third size of other 

 two. Mesenteric junction with proctodeum diagonal, to right of malpighian knot; enteric 

 valve seating lateral in unopened abdomen, prominently two-lobed, connected to second 

 pouch of proctodeum by moderately long neck; membranous wall of valve beyond cushions 

 with sparse minute spicules. 



Measurements (one specimen) in millimetres. 



Head width (W) .... 088 



Fore tibia width (T w ) . . . . 014 



Fore tibia length (Ti) .... 0-65 



Postclypeus length (Pel) . . . 0-27 



Left mandible, apical to first marginal (La) 0-09 



Left mandible, first to third marginal (Li) . 0-13 

 Left mandible, third marginal to molar 



(L m ) 005 



Right mandible, apical to first marginal 



(Ra) 009 



Right mandible, first to second marginal 



(Ri) 009 



Right mandible, second marginal to molar 



(R m ) 006 



This species was originally confused with Alyscotermes kilimandjaricus (Sjostedt). 

 It was first recognized in the principal component analysis as an anomalous outlying 

 point at some distance from the cloud represented by the numerous specimens of the 

 latter. This is illustrated in Text-fig. 105, and compared with similar graphs 

 derived from complex ratios. These incorporate most of the variation comprised 

 in the latent roots corresponding to the principal component scores as illustrated, 

 and provide the best discrimination between the two species based on measurements. 



A . hapalus has been compared to A . aganus and A . rnitis under the former species 

 heading. A. ignavus and A. murcus are distinguishable from A. hapalus in the 

 imago by their head pilosity, in which very long setae emerge from a shorter pelt, 

 their larger fontanelle, and less inflated postclypeus. The workers of those two 

 species have vestigial third apical spurs on their very slender fore tibiae. Whether 

 or not the abdomen is dehiscent is unknown. 



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

 Kenya: Ngong Hills (near Nairobi), N.W. end, 16. vi. 1953 (W. A. Sands collection 

 No. S497) in British Museum (Natural History). 



Only the type-series is known. The small colony was found under a loose rock. 



