W. A. SANDS 



Measurements (Major soldiers, 151 specimens from 39 localities, minor soldiers, 28 specimens 

 from 13 localities). 



Major Soldier 



Head length to tip of nose 

 Width of head 

 Depth of head 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



Minor Soldier 



Head length to tip of nose 

 Width of head 

 Depth of head 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



Range 

 1-71-2-23 

 0-93-1-36 

 0-68-0-99 

 0-54-0-68 

 0-18-0-25 

 1-04-1-39 



Range 

 118-1-61 

 0-43-0-64 

 036-0 -50 



0-38-0-47 

 013-0-20 

 0-82-1-18 



Mean 



2 



02 



I 



05 







84 







58 







23 



I 



19 



le 



an 



1 



4i 







53 







43 







4i 







16 



1 



OT 



A darker coloured form of the imago with dusky pronotum has been recorded from South 

 Africa, but it is less variable in size and shape than most other species. It only overlaps in size 

 range with T. bettonianus and T. rapulum among East African species, and T. occidentalis and 

 T. togoensis among West African. 



T. dispar differs from T. bettonianus in the very much smaller " scent " gland on 

 the $ fifth abdominal sternite, in the narrower fontanelle, and in the 7-8 ridges on 

 the right molar plate. T. rapulum differs in the shape of the fontanelle, in the some- 

 what more inflated postclypeus, and in most specimens, in having two small diverging 

 depressions in front of the fontanelle, though these are not always present. T. 

 togoensis has usually 16 segmented antennae, and three diverging pale coloured 

 streaks on the vertex ; T. occidentalis has larger eyes. 



The range of variation in the soldier caste overlaps with T. rhodesiensis, T. rapulum, 

 and T. togoensis. Some specimens of T. rhodesiensis and T. rapulum are indistin- 

 guishable from some T. dispar, but T. togoensis is usually separable by the more 

 densely hairy nose tip, and the other two species by slight differences of profile and 

 plan view of the head capsule, given in the key. 



Type Material. Ethiopia : Eritrea, Mt. Kullo 1871 (Antinori), T. kidloensis 

 (Sjostedt), $ imago specimen labelled " co-typus ", unique, Mus. Civ. Stor. Nat., 

 Genoa. The additional material recorded by Sjostedt as deposited at the Naturhist. 

 Riksmus., Stockholm, was reported in September 1962, to be lost ; Eritrea 

 (Escherich), syntype soldiers from type colony, T. erythreae (Holmgren) A.M.N.H. 

 and B.M.(N.H.) ; El Dire, 18.V.1939 (G. M. Ghidini), paratype soldiers from type 

 colony, T. eldirensis Ghidini B.M.(N.H.) and A.M.N.H. (Holotype in Mus. Civ. Stor. 

 Nat., Genoa.) 



Nyasaland : Zomba (Cameron), syntype soldiers, T. dispar (Sjostedt) Naturhist. 

 Riksmus., Stockholm. 



Congo : Katanga, Elizabeth ville (/. Bequaert), syntype soldiers, type colony, T. 

 katangensis (Sjostedt) A.M.N.H. (other syntypes listed by Sjostedt (1926) as in 

 Naturhist. Riksmus., Stockholm). 



