ETHIOPIAN NASUTITERMITINAE 



151 



Posterior margin of head capsule behind eyes rounded, less than semi-circular, turned slightly 

 outwards at eye rim ; fontanelle almost obsolete, very indistinct, shape uncertain ; eyes oval, 

 scarcely set out from sides of head, moderately prominent in proportion to own diameter, large 

 relative to head width, W/E index 2-6-2-7 '• ocelli medium-sized, oval, separated from eye by 

 less than one-fifth own least diameter ; postclypeus moderately inflated, width about twice 

 length, anterior margin slightly convex, posterior convex, rounded, very indistinct ; antennae 

 15 segmented, II, IV and V subequal, III shorter. 



Pilosity of head rather even and dense, but not sufficiently so to form a " pelt " or " mat ", 

 pronotum and abdominal pilosity similar, longer towards margins of sclerites. 



Measurements (2 specimens from 1 locality) in millimetres. 



Range 

 Head width across eyes ..... 0-85-0-88 



Greatest diameter of eye 



Ocellus 



Ocellus to eye . 



Width of pronotum 



Length of pronotum 



Length of hind tibia 



Length of fore wing 



o-33 

 010 x 014 



002 

 0-69-0-71 



050 

 1 00-1 09 

 6-80-7-20 



Soldier. Head capsule pale yellow to yellow, nose orange-yellow to orange, rest of body 

 cuticle pale yellow. 



Head capsule in plan view distinctly constricted behind antennae, posterior margin evenly 

 rounded ; nose thin and cylindrical or slightly tapering. In profile undulating with distinct 

 hump at base of nose, to nearly straight, with weak depression in front of evenly rounded pos- 

 terior lobe ; antennae, II, III and V subequal, IV shorter, antennal socket usually with small 

 ridge over dorsal rim. Conspicuous setae of head consist of six to ten in three to five pairs 

 approximately in line across base of nose in front of constriction, and three to five pairs similarly 

 arranged on posterior lobe behind constriction, the latter being less regular in position. 



Measurements (16 specimens from 4 localities) in millimetres. 





Range 



Mean 



Head length to tip of nose . 1 20-1 35 



1 29 



Head width . 



0-58-0-64 



062 



Depth of head capsule 



0-38-0-43 



0-41 



Width of pronotum 



0-31-0-35 



034 



Length of pronotum 



0-11-0-13 



012 



Length of hind tibia 



0-68-0-75 



069 



E. undulans differs in the imago from E. bipartitus in the almost obsolete fontanelle 

 and shorter hind tibia. E. convergent has a conspicuous fontanelle and smaller 

 ocelli more distant from the eyes, as is also the case with E. abrnpttis. The differ- 

 ences from E. aquilinus are discussed under that species. In the soldier, E. abruptus 

 is closest, differing only slightly in the more abrupt depression behind the base of the 

 nose. E. convergens has a thicker nose, and the other two species fewer head setae. 



Holotype $ imago, allotype <$, morphotype soldier, and paratypes from type 

 colony. Ghana : 25m. north of Wenchi on Bamboi Road, 30.iii.1959 (W. A. 

 Sands Coll. No. S.2680). In British Museum (Natural History). 



Other paratype material. Ghana : 3m. from Larabanga on Bole Road, 22.iii. 

 1959, and 12m. N. of Techiman on Wenchi Road, 29.iii.1959 (W. A. Sands), soldiers 

 and workers. 



