THE SOLDIERLESS TERMITES OF AFRICA 163 



those of outer row numbering 30-40. Spines of other cushions slender, evenly 

 tapered and nearly straight to their tips (PI. 6, figs 1 & 2) . . ctenopher (p. 163) 



- Postclypeus less inflated, Pcl/W, 0-22-0-24. Enteric valve cushion 1 with dilated 



outer end not inflated, flat in middle with a few scattered short spines and a single 

 outer row of prominent spines numbering 14-18. Wall of enteric valve seating 

 commonly with sclerotized cup which fits over spines of cushion 1. Spines of 

 other cushions more tapered and slightly hooked at tips (PI. 5, figs 7-9) 



sentosus (p. 176) 



5 Right mandible with anterior edge of first marginal tooth equal to or longer than 



that of second. End of enteric valve cushion t armed with 15-23 spines (only 



one recorded over 20) ........... 6 



- Right mandible with anterior edge of first marginal tooth shorter than that of second. 



End of enteric valve cushion 1 armed with 23-40 spines (most specimens 25 or 

 more) .............. 7 



6 Postclypeus more inflated, Pcl/W, 030. End of enteric valve cushion 1 more widely 



dilated (PI. 5, figs 1-3) . . . . . . . . rastratus (p. 171) 



- Postclypeus less inflated, Pcl/W, 0-27. End of enteric valve cushion 1 less widely 



dilated (PI. 4, figs 6 & 7) . . . . . . . pectinatus (p. 168) 



7 Fore tibia slightly thicker, Ti/T w , 5-05. Apical tooth of left mandible longer, 



I. A /Li.L m , 14-41 Mesenteric overlap with proctodeum at junction, length nearly 

 three times width of mesenteron at insertion of malpighian tubules. Enteric 

 valve cushions very narrow, positions 2-4 armed with long slender spines (PI. 6, 

 figs 3-5) .......... spinulatus (p. 170) 



- Fore tibia thinner, Ti/T Wl 5*35 — 5'90. Apical tooth of left mandible shorter, I. A /Fi.L m , 



10-28-13-06. Mesenteric overlap with proctodeum at junction about twice as 

 long as width of mesenteron at insertion of malpighian tubules. Enteric valve 

 cushions broader, positions 2-4 armed with stouter spines (PI. 5, figs 4-6) 



miiricattis (p. 165) 



Ateuchotermes ctenopher sp. n. 



(Text-figs 403, 404, 411, 412 & 419-444; PI. 6, figs 1 & 2) 



Imago. (Kings and Queens, colours may be faded.) Head capsule brown, sepia-brown 

 above ocelli; fontanelle less than half size of ocellus, roughly circular, outline indistinct, flat 

 or slightly depressed, pale yellow-brown; medial spot circular, flat or slightly raised, minute, 

 coloured as head; postclypeus pale brown, labium yellow; frontal marks very indistinct flat 

 yellow-brown crescents; antennae pale yellow-brown. Pronotum, meso- and metanota pale 

 brown, transverse dark sutures present; femora pale yellow-brown, tibiae paler, tarsi yellow- 

 white. Abdominal tergites and dorsal stigmata pale yellow-brown, sternites and ventral 

 stigmata very pale yellow-brown, sternites paler in middle, cerci yellow. 



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

 sized, separated from compound eyes by from slightly over half to five-sixths own least diameter; 

 postclypeus weakly to moderately inflated, Pcl/W, 0-23-0-26, posterior margin evenly rounded, 

 median suture weakly developed. Apical teeth of mandibles short, La/Pi, 0-54-0-64, Ra/Ri, 

 0-69-0-84; subsidiary marginal tooth of left mandible with proximal end just clear of molar 

 prominence in surface view, complex ratio, La/Li. L m , 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 

 distinctly shorter than that of second. Meso- and metanota moderately wide at constriction, 

 M/W, 0-28-0-31. Pilosity of head capsule yellow-brown, very even pelt with very sparse 

 emergent setae, mostly paired bilaterally. 



Measurements (three specimens from two localities) in millimetres. 



