THE SOLDIERLESS TERMITES OF AFRICA 4 t 



io. M/R A (mesonotal width divided by right apical to first marginal) 

 ii. O w /0-E (ocellus least diameter divided by ocellus to eye distance) 



Worker alone 



12. R A /Ri.Rm (ratio 2 divided by right second marginal to molar notch) 



13. Pcl/Ri (postclypeus length divided by right first to second marginal) 



14. Ti/T w (Fore tibia, length divided by greatest width) 



15. L m /T W .LA (complex ratio of tibial width and left mandible measurements) 



Imagos 



Left mandible with proximal end of subsidiary marginal tooth hidden behind 

 molar prominence when viewed from the front (Text-fig. 45). Head capsule 

 very glossy, pilosity of sparse fine setae forming a pelt with regularly spaced 

 paired emergent setae among them. Fore tibia with three apical spurs, third 

 vestigial and difficult to detect. Fontanelle conspicuous elongate-oval, larger 

 than ocellus. Small to medium-sized, W, 0-81-0-90 AMALOTERMES (p. 47) 



Left mandible with proximal end of subsidiary marginal tooth at least level with 

 edge of molar prominence, clear of it in most genera, when viewed from the 

 front. Head capsule not markedly glossy, pilosity, when it forms a pelt, with 

 scattered, not regular emergent setae. Fore tibia with two or three definite 

 apical spurs, third rarely vestigial. Fontanelle seldom larger than ocellus, if 

 so, either more than twice as large, or entire specimen larger, \V, 1-03-1 -20 . . 2 



Fore tibia with only two apical spurs, no trace of third, outer spur 



ADAIPHROTERMES (p. 22^) 



Fore tibia with three apical spurs, third usually distinct though smaller than inner 



pair, only vestigial in three widely unrelated species ..... 3 



; Left mandible with proximal end of subsidiary marginal tooth level with edge of 



molar prominence, viewed from the front ....... 4 



- Left mandible with proximal end of subsidiary marginal tooth clear of edge of molar 



prominence, viewed from the front ........ 8 



[ Small, W, 0-57-0-66 ACIDNOTERMES (p. 44) 



- Larger, W, 0-99-1-21 ........... 5 



i Apical teeth of mandibles shorter, La/L|, 0-51-0-57, R A /R|, 0-73-0-87 ... 6 



- Apical teeth of mandibles longer, L A /Li, 0-79-1-04, R A /Ri, 1-11-1-45 ... 7 

 > Larger, W, 1-14-1-21. Ocelli separated from compound eyes by two-fifths own 



least diameter or more. Postclypeus moderately inflated, Pcl/VV, 0-27-0-31. 

 Meso- and metanota rather narrow at constriction, M/W, 0-24-0-28, complex 

 ratio Li/M.N, 1-76-2-32. Pilosity of head uneven, not forming a pelt 



ADYNATOTERMES (p. 102) 



- Smaller, \V, 0-98-1-04. Ocelli very large, almost touching compound eyes or 



separated by up to one-quarter own least diameter. Postclypeus weakly inflated, 

 Pcl/W, 0-23. Meso- and metanotum wider at constriction, M/W, 0-29-0-33, 

 complex ratio Lj/M.N, 0-54-0-56. Pilosity of head an even pelt with emergent 

 setae . . . . . . . ATEUCHOTERMES (p. 158) 



7 Meso- and metanota wider at constriction, M, 0-31, N, 0-33-0-35, M/W, 0-30-0-32 



ACHOLOTERMES (p. 139) 



- Meso- and metanota narrower at constriction, M, 0-24-0-28, N, 0-22-0-27, M/W, 



0-21-0-24 AGANOTERMES (p. 135) 



1 Meso- and metanota proportionately narrower at constriction, M/W under 0-26, 

 or if more, complex ratio Lj/M.N over 2-4. Compound eyes not prominent, 

 somewhat flattened, back of head narrowly rounded behind them. Smaller, 

 W, 0-69-1-10, only two species over 0-98 ....... 9 



