206 W. A. SANDS 



fontanelle. Its different proportions clearly separated it in principal component 

 analyses shown in Text-fig. 566. 



In the worker caste, all species other than the last named are distinguishable from 

 A. cnaphorus by their less developed enteric valve armature. The development 

 of cushion position 3 reaches its most specialized form and maximum elongation in 

 A . polyscolus. In A. cnaphorus it is shorter, slightly wider and tapers more sharply 

 to the tip. This species also has slightly longer mandibular apical teeth, a slightly 

 less swollen fore tibia and is generally a little longer. The abdomen is definitely 

 dehiscent in A. cnaphorus. 



Holotype $ queen, paratype king and workers from type-colony, Democratic 

 Republic of Congo: Katanga, Keyberg, near Elizabethville, 23.lv. 1948 (Winifred 

 Emerson), in American Museum of Natural History. 



Other paratype material. Democratic Republic of Congo : Katanga, 5 km E. 

 of Elizabethville, 26.iv.1948 (A. E. Emerson) in AMNH. Malawi: 7 m. from Nkata 

 Bay on Ekwendeni Road, 22.ix.1953 (W. A. Sands & W. Wilkinson) in BMNH. 



The type-colony was found in a small soft mound 4 inches high in 'Dambo', i.e., 

 seasonally flooded grassland. Other records are from the surface layers of a Macro- 

 termes goliath mound, and from soil at the foot of an old tree stump. 



Anenteotermes disluctans sp. n. 



(Text-figs 536-539 & 548-553 ; PL 7- ng. 7) 



Imago. Head capsule sepia-brown, darker above ocelli; fontanelle about half as long as 

 ocellus, rather narrow oval, flat or slightly depressed, yellow; medial spot short oval, smaller 

 than fontanelle, flat, coloured as head; postclypeus brown, labrum yellow-brown; frontal marks 

 small slightly depressed brown crescents; antennae yellow-brown. Pronotum brown, meso- 

 and metanota yellow-brown, transverse sutures weak if present; femora pale yellow-brown, 

 tibiae and tarsi yellow. Abdominal tergites yellow-brown, sternites pale yellow-brown laterally, 

 yellow in middle, dorsal and ventral stigmata dark ; cerci yellow. 



Posterior margin of head capsule evenly rounded; ocelli medium-sized, separated from com- 

 pound eyes by less than half up to nearly own least diameter, postclypeus moderately to strongly 

 inflated, Pcl/W, 0-28-0-34, posterior margin evenly rounded though not always distinct, median 

 suture present. Apical teeth of mandibles short, La/Li, 0-46-0-56, Ra/Ri, 0-62-0-75; sub- 

 sidiary marginal tooth of left mandible well clear of molar prominence in surface view, complex 

 ratio, La/Li. L m , 6-76-8-51, point of first marginal tooth of right mandible slightly behind line 

 of apical to second marginal, anterior edges of marginal teeth equal, complex ratio, Ri/R A .Rm 

 (note difference from ratio used in worker caste) 22-0-28-5. Pilosity of head capsule brown, 

 dense, uneven, not forming a pelt. 



Measurements (nine specimens from five localities) in millimetres. 



Range Mean ± S.D. 



Head width across eyes (W) . 0-88-0-96 0-918 ± 0-028 



Ocellus (O w x Oi) . 

 Ocellus to eye (O— E) 

 Postclypeus length (Pel) 

 Antennal article III 

 Antennal article IV 

 Antennal article V . 



0-06-0-09 X 0-09-0-13 0-075 ± 0-007 X 0-102 ± 0012 

 0-04-0-06 0044 i 0-008 



0-25-0-31 0-286 ± o-oio 



003-005 0-031 ± 0-007 



0-04-0-06 0-047 i 0-006 



0-04-0-05 0-044 i 0-004 



