THE SOLDIERLESS TERMITES OF AFRICA 195 



than three times width of mesenteron at insertion of malpighian tubules, proximal 



end only just to left of malpighian knot .... improelatans (p. 212) 



Right mandible with anterior edge of first marginal tooth distinctly shorter than 

 that of second. Mixed segment, length of proctodeal overlap more than three 

 times width of mesenteron, proximal end well to left of malpighian knot . . 5 



Larger, \V, 084. Postclypeus less inflated, Pcl/Ri, 161 . . . hemerus (p. 209) 



Smaller, W, 0-61-0-75. Postclypeus more inflated, Pcl/Ri, 1-63-3-00 ... 6 



Apical teeth of mandibles longer, La/Li, 0-61-0-70, R A /Ri, 0-77-0-84. Smaller, 



VV, 0-60-0-63 ............ 7 



Apical teeth of mandibles shorter, La/Li. 0-46-0-53, Ra/Ri, 0-54-0-65. Larger, 



\V, 068-075 8 



Fore tibia scarcely inflated, T|/T w , 500, with third apical spur vestigial, one-fifth or 

 less of length of other two. Enteric valve, seating weakly three-lobed, third 

 smaller; connected to second pouch of proctodeum by distinct neck 



amachetus (p. 195) 

 Fore tibia inflated, Ti/T w , 3-85-4-00 with third apical spur distinct, one-quarter or 

 more of length of other two. Enteric valve seating almost a rim, very weakly 

 two-lobed, sessile on second pouch of proctodeum, without a neck 



improcinctus (p. 210) 

 Pilosity of head capsule distinctly darker, conspicuous against paler head cicur (p. 200) 

 Pilosity of head capsule, fine, pale, inconspicuous ...... 9 



Gambia, West Africa ........ ateuchestes (p. 198) 



Central Africa to Uganda ....... disluctans (p. 206) 



Anenteotermes amachetus sp. n. 



(Text-figs 506-509 & 518-523; PI- 8, fig. 1) 



Imago. Head capsule brown (queen, colours may be faded), darker above ocelli; fontanelle 

 small, less than half size of ocellus, nearly flat, slightly ridged oval, pale yellow-brown; medial 

 spot circular, smaller than fontanelle, flat, coloured as head; postclypeus yellow-brown, 

 labrum yellow; frontal marks, indistinct flat yellow-brown crescents; antennae, yellow-brown. 

 Pronotum, meso- and metanota yellow-brown, transverse sutures present; femora and tibiae 

 pale yellow-brown, tarsi yellow. Abdominal tergites and dorsal stigmata yellow-brown, 

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



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

 sized, separated from compound eyes by less than half own least diameter; postclypeus 

 moderately inflated, Pcl/W, 0-28, posterior margin evenly rounded, median suture present but 

 weakly developed at each end. Apical teeth of mandibles short, L A /L[, 057, Ra/Ri, 087; 

 subsidiary marginal tooth of left mandible widely clear of molar prominence in surface view, 

 complex ratio, La/Li. L m , 11-46; point of first marginal tooth of right mandible slightly behind 

 line of apical to second marginal, anterior edges of marginal teeth approximately equal, complex 

 ratio, Ri/RA-Rm (note difference from ratio used in worker caste), 21-30. Pilosity of head cap- 

 sule dense, slightly uneven, brown, nearly forming a rough pelt with emergent setae. 



Measurements (unique queen) in millimetres. 



Head width across eyes (W) . . o-8o 



Ocellus (O w x Oi) . . . 008 x 010 



Ocellus to eye (O-E) . . . 003 



Postclypeus length (Pel) . . 0-23 



Antennal article III . . . 002 



Antennal article IV . . 004 



Antennal article V 004 



