THE SOLDIERLESS TERMITES OF AFRICA 179 



Holotype, <$ dealate, unique, Nigeria: Port Harcourt, 19.x. 1957 (W. Wilkinson, 

 No. 841 /A) in British Museum (Natural History). 



Paratypes. Nigeria: Benin Province, Obanokoro, Sobo Plain (two vials), 

 10. i. 1957 (W. Wilkinson), workers only, in BMNH. Guinea: Mount Nimba 

 (M. Lamotte) in AMNH. 



The only biological information on this species is that it was found in and under 

 damp rotting logs in forest. 



Ateuchotermes spinulatus sp. n. 



(Text-figs 450, 451, 458, 459 & 474-479; PL 6 - fi g s 3-5) 



Imago. (Queen, colours may be faded.) Head capsule chestnut-brown, darker above ocelli; 

 fontanelle roughly circular, with tendency towards triangular outline, slightly depressed, less 

 than half size of ocellus, yellow-brown ; medial spot circular, flat, slightly smaller than fontanelle, 

 coloured as head; postclypeus chestnut-brown, labrum yellow-brown; frontal marks distinct, 

 smooth, semicircular, slightly depressed, coloured as head; antennae brown. Pronotum, 

 meso- and metanota, chestnut-brown, transverse dark sutures present, weak on mesonotum; 

 femora brown, tibiae yellow-brown, tarsi yellow. Abdominal tergites brown, dorsal stigmata 

 distinct, dark sepia-brown, sternites brown, pale brown in middle, ventral stigmata sepia- 

 brown; cerci yellow-brown. 



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

 sized, separated from compound eyes by distinctly more than own least diameter; postclypeus 

 weakly inflated, I'cl/W, 023, posterior margin evenly rounded, median suture weak. Apical 

 teeth of mandibles fairly short, La/Li. 066, R A /Ri, 101; subsidiary marginal tooth of left 

 mandible with proximal end just clear of molar prominence in surface view, complex ratio, 

 LA/Li.Lm, 7-40-9-10; point of first marginal tooth of right mandible slightly behind line of apical 

 to second marginal, anterior edge of first marginal equal to or slightly shorter than that of second. 

 Meso- and metanota rather narrow at constriction, M/W, 0-26. Pilosity of head capsule a 

 somewhat irregular pelt with emergent setae. 



Measurements (one specimen) in millimetres. 



Head width across eyes (\Y) . . 121 



Ocellus (O w x Oi) . . . 009 x 014 



Ocellus to eye (O-E) . . . 01 1 



Postclypeus length (Pel) . . 0-28 



Antennal article III . . . 005 



Antennal article IV . . 006 



Antennal article V . . . 0-06 



Left mandible, apical to first mar- 

 ginal (L A ) . . • . 01 3 



Left mandible, first to third mar- 

 ginal (Li) .... 019 



Left mandible, third marginal to 



molar (L m ) .... 008 



Right mandible, apical to first 



marginal (Ra) • • • • o-i 3 



Right mandible, first to second 



marginal (Ri) .... 013 



Right mandible, second marginal 



to molar (R m ) .... 009 



Mesonotum width (M) . . . 0-32 



Metanotum width (N) . . . 036 



