THE SOLDIERLESS TERMITES OF AFRICA 113 



prominent lobes. The large eyes and ocelli of A. pacahts are distinctive, and the 

 subsidiary tooth of the left mandible is only just clear of the molar plate. The 

 type-species, A. prosenus, is very large, with a circular pale fontanelle and longer 

 apical mandibular teeth. The worker abdomen of A. aneristus is not dehiscent. 



Holotype $ imago (queen) and six paratype workers from type-colony only, 

 Zambia: Kitwe, 23.1.1957 (W. G. H. Coaton) in National Collection of Isoptera, 

 No. TM.3927, Pretoria. 



Only the type nest-series is known, and there is no information on its biology. 



Astratotermes apocnetus sp. n. 



(Text-figs 246, 247, 252, 253 & 262-267) 



Imago. Head capsule very dark chestnut-brown, pitch-black above ocelli; fontanelle less 

 than half size of ocellus, somewhat irregular oval, slightly depressed or ridged in middle, dark 

 chestnut-brown, medial spot same size as fontanelle, slightly raised or nearly flat, short oval, 

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

 somewhat depressed, semicircular, dark chestnut-brown; antennae brown. Pronotum dark 

 sepia-brown, meso- and metanota chestnut-brown, transverse dark sutures distinct; legs, 

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

 sepia-brown, ventral stigmata and lateral parts of sternites brown, middle of sternites paler; 

 cerci yellow. 



Posterior margin of head capsule evenly rounded ; ocelli rather small, separated from compound 

 eyes by approximately own least diameter; postclypeus moderately inflated, Pcl/W, 0-27-0-28, 

 posterior margin evenly rounded, median suture very distinct. Apical teeth of mandibles short, 

 La/Lj, 0-49-0-66, Ra/Ri, 0-69-0-70; subsidiary marginal tooth of left mandible widely separated 

 from molar prominence in surface view, complex ratio La/Li. L m , 5-63-6-06; point of first 

 marginal tooth of right mandible slightly behind line from apical to second marginal, anterior 

 edges of marginal teeth approximately equal in length. Meso- and metanota moderately wide 

 at constriction, M/W, 0-30-0-31. Pilosity of head capsule brown, uneven, no pelt. 

 Measurements (two specimens from one locality) in millimetres. 



Head width across eyes (\V) . 1-20-1-28 



Ocellus (O w x Oi) . . . 008-009 X 010-011 



Ocellus to eye (O-E) . . 008-009 



Postclypeus length (Pel) . . 0-33-0-36 



Antennal article III . . . 005-006 



Antennal article IV . . 006 



Antennal article V . . . 006-007 



Left mandible, apical to first 



marginal (La) ... 0-12 



Left mandible, first to third mar- 

 ginal (Li) .... 0-21-0-23 

 Left mandible, third marginal to 



molar (L m ) .... 0-09-0-10 



Right mandible, apical to first 



marginal (R A ) . . . 012-013 



Right mandible, first to second 



marginal (Ri) . . . 0-17-0-18 



Right mandible, second marginal 



to molar (R m ) . . . 0-09 



Mesonotum width (M) . . °'37-o - 39 



Metanotum width (N) . . 0-36-0-41 



