W. A. SANDS 



longer on posterior segments, sternites with short backward directed setae up to one-third 

 length of longer downward or slightly forward directed setae on posterior margins, arranged in 

 4-6 longitudinal rows. 



Minor soldier : colour as major soldier except nose always dark, antennae 12-13 segmented, 

 usually 12. 



Measurements (Major soldiers, 74 specimens from 18 localities, minor soldiers, 9 specimens 

 from 6 localities) in millimetres. 



Major Soldiers : 



Head length to tip of nose 

 Head width . 

 Depth of head capsule 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



Minor Soldiers : 



Head length to tip of nose 

 Head width . 

 Depth of head capsule 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



Range 



I-85-2-33 

 1 07-1 50 

 0-75-1-07 

 0-54-0-71 

 0-22-0-29 

 1-07-1-53 



Range 

 1-43-1-62 

 0-57-0-64 

 0-45-0-54 

 0-40-0-45 

 0-18-0-22 

 1-04-1-25 



Mean 

 210 

 1 30 

 091 

 061 

 025 

 1-25 



Mean 

 149 

 060 

 0-48 

 042 

 019 

 in 



T. rapulum is extremely difficult to separate from T. rhodesiensis in many samples 

 of both imago and soldier castes, and these may be regarded as siblings, being 

 partially sympatric. Most but not all imagos of T. rapulum have small diverging 

 depressions on the frons, and are slightly smaller, with a slightly more inflated 

 postclypeus than T. rhodesiensis ; the fontanelle is often smaller and slightly 

 differently shaped (Text-figs. 308-313). Soldiers of T. rapulum have usually a 

 shorter nose and a slightly different profile, but specimens occur which are virtually 

 indistinguishable from some T. rhodesiensis. Where the two species occur together 

 in one locality, they are usually recognizably different, and the difficulty arises when 

 attempting identification of meagre material of only one. Comparisons with T. 

 dispar and T. occidentalis are made in the discussion of those species. 



Type Material. Tanganyika : Tanga, no date (v. Reden), syntype soldiers, type 

 colony, T. rapidum (Sjostedt), Naturhist. Riksmus., Stockholm (other syntypes in 

 Mus. Berlin and A.M.N.H.). 



Republic of South Africa : Natal, Zululand, Mfolosi Drift, Mkosi, 1905 (I. 

 Trdgdrdh), syntype $ imago, type colony, T. zidtiensis (Holmgren), A.M.N.H. (other 

 syntypes stated by Holmgren to be in Mus. Goteborg) ; Transvaal, Pretoria, 

 Meukleneuk Hill, 3.X.1916 (C. Rudolph), paratype $ imagos, type colony T. pretorien- 

 sis Fuller, B.M.(N.H.). (Holotype in N.C.I. , Pretoria.) 



Other Material (additional to that recorded in Sands (1957)). Tanganyika : 

 Dar-es-salaam, no date (Regner) ; Iringa, 8.1.1935, 2 vials (H. Kirby), A.M.N.H. 



Southern Rhodesia : Salisbury, iv.1917 (R. W. Tucker) ; also 6.iv. and 3.vii. 

 1949, and 5.xii.i95o (G. H. Bunsli) ; Guluene River, 21 ° 41' S., 31 ° 47' E., 13JX. 

 1962 (/. C. Felton). 



Republic of South Africa : Transvaal ; Letaba, 23.ix.1919 (C. Fuller). 

 Olifant River, x.1927 (H. Lang), A.M.N.H. ; Pietersburg, 8.xii.i936, Groblersdal, 



