94 W. A. SANDS 



also in most specimens by the differing pilosity of the vertex ; the $ is less readily 

 separable because the $ cerci of all species are longer than in the $, and the ventral 

 " scent " glands are smaller. The soldiers are usually darker in colour, and have 

 visible small setae on the middle abdominal tergites, but specimens which are 

 virtually indistinguishable do occur. 



T. geminatus is more readily distinguished from T. trinervius in the soldier caste, 

 by the distinctly more hairy nose tip, and usually by the darker pigmentation of the 

 abdominal tergites. The imagos are less easily separable, having usually propor- 

 tionately smaller eyes and less inflated postclypeus ; in addition, the cerci of the $ 

 T. trinervius are usually longer, and somewhat irregular in outline, and the shorter 

 vertex setae very regular in length. There is little likelihood of confusion with any 

 other species apart from the larger, darker soldiers of T. togoensis, but some indivi- 

 duals in any nest series of this species have 13 segmented antennae with the basal 

 segments only partially or not subdivided. 



Dr. A. E. Emerson has selected and labelled a specimen from the type series as 

 lectotype, but the designation has not been published hitherto : 



Lectotype : Ghana : no other data, lectotype pinned major soldier, T. geminatus 

 (Wasmann) (in Mus. Maastricht). Paralectotypes, Naturhist. Riksmus., Stockholm, 

 and A.M.N.H. 



Type Material. Mauritania (Probable) : " Cote Atlantique du Sahara " no 

 date (A. Gruvel), syntype soldier, from type colony T. grossus (Sjostedt), A.M.N.H. 

 (other syntypes, Mus. Paris, and Naturhist. Riksmus., Stockholm). 



Ghana : no other data. Paralectotvpe soldiers from tvpe colony, T. geminatus 

 (Wasmann), A.M.N.H. 



Nigeria : Ibadan, 5.viii.i922 (A. W. J. Pomeroy), syntype imagos and soldiers 

 from type colony T. ibidanicus Sjostedt, A.M.N.H. (other syntypes, Naturhist. 

 Riksmus., Stockholm). 



Sudan : " Tanguru " (= Tungaru, io° 14' N, 30 42' E), 7.^.1914 (R. Ebner), 

 syntype soldiers from type colony T. ebenerianus Sjostedt, A.M.N.H. (other syntypes 

 Mus. Vienna and Naturhist. Riksmus., Stockholm). 



Other Material. Sierra Leone : Samaia, 29. v. 1948 (F. A. Squires). 



Ghana : Accra, 29. vi. 1926 (A. W. J. Pomeroy) ; 1926 (W. H. Patterson) ; 

 Achimota, 21. i. 1955 (W. V. Harris) ; Prampram, 16. xi. 1955, 54m. from Accra on 

 Ada Road, 17. xi. 1955, Afienya, and Nungoa, near Accra, 13-16. vi. 1956, 10 vials 

 (W. Belfield) ; 30m. N.E. of Accra, hi. 1958 (R. Hamilton) ; 12m. from Accra on 

 Kumasi Road, 18. ii. 1959, 12m. S. of Tamale on Kumasi Road, 27.il. 1959, 5m. and 

 16m. from Daboya on Tamale Road, 28.ii.1959, 2 vials, 28m. from Tamale on Bolga- 

 tanga Road, 1. hi. 1959, 55m. from Tamale on Larabanga Road, 3. hi. 1959, 35m. 

 from Tamale on Yendi Road, 4. hi. 1959, 4m. from Gambaga on Walewale Road, 

 5. hi. 1959, 25m. S.E. of Gambaga on Yendi Road, and 17m. N.E. of Gambaga on 

 Bawku Road, 6. hi. 1959, 20m. from Bolgatanga on Bawku Road, 8.U1.1959, 20m. 

 from Bolgatanga on Tamale Road, and gm. from Bolgatanga on Navrongo Road, 

 g.hi.1959, 31m. from Navrongo on Tumu Road, 13. hi. 1959, 11m. from Tumu on 



