ETHIOPIAN XASUTITERMITINAE 85 



Minor Soldiers Range Mean 



Width of pronotum . . 0-40-0-54 .... 0-47 



Length of pronotum . . 0-18-0-25 .... 0-22 



Length of hind tibia . . 0-95-1-40 . . . . 1-18 



The relationships of this species have been discussed in an earlier paper, Sands 

 (1957). Since then, specimens have been examined of the soldier caste of T. 

 rhodesiensis and T. occidentalis which approach T. bettonianus in shape, but differ in 

 the former by the less conical nose and the latter by the larger fontanelle ; both 

 have 13-14 segmented antennae. The imagos of these species differ in having much 

 smaller " scent " glands on the $ fifth sternites. 



Lectotypes have been designated from the existing syntype material of T. 

 bettonianus (Sjostedt), and T. crassinasus (Sjostedt), as indicated below, the desig- 

 nation for the senior synonym being given separately. 



Lectotype : Kenya : Athi River, 8-19.V.1899 (C. S. Betton), lectotype <$ imago, 

 T. bettonianus (Sjostedt), in B.M.(N.H.). (Paralectotype imagos in Naturhist. 

 Riksmus., Stockholm.) 



Type Material. Tanganyika : Amani, (Morstatt), syntype soldier, type colony, 

 T. ruficeps (Holmgren), A.M.N.H. (Other syntypes in Mus. Stuttgart.) 



Mozambique : Villa Fontes, 1914 {H. Swale), lectotype soldier and paralectotype 

 soldier, type colony, T. crassinasus (Sjostedt), B.M.(N.H.). (Other paralectotype 

 soldiers from type colony in Naturhist. Riksmus., Stockholm.) 



Other Material (additional to that recorded in Sands, 1957). Kenya : Machakos, 

 17.ii.1951 (W. V. Harris) ; Ruiru, 11.iii.1951, Thika, Ngong (R. C. H. Sweeney) ; 

 Thika, 15. v. 1952, Ngong, 16. vi. 1953 (W. A. Sands). 



Tanganyika : Ukerewe Is., 1938 (W. V. Harris) ; Mwanza, 4JX.1948, Amani, 

 4JX.1949, 11. x. 1950, and 4.L1952, Itigi, 8.ix.i949, Singida, 10. ix. 1949, Ngomeni, 

 19.V.1951 (P. B. Kemp) ; Tanga, 1950, 4 vials, Pangani, 20.ii.1951 (R. C. H. 

 Sweeney), Hakara, 10.vii.1949, Kwiro, 20.vii.1949, and Madidi, 24.vii.1949 (M. 

 Luscher), A.M.N.H. 



Nyasaland : nr. Ft. Johnstone, 23-24. viii. 1953, 2 vials, 2m. from Bilila on Ft. 

 Johnstone Road, 27. viii. 1953, 20m. from Ft. Johnstone on Zomba Road, 28. viii. 

 1953, im. W. of Lake Shirwa, 31.viii.1953, Namatalu Hill, i.xi.1953, 2 vials (W. A. 

 Sands, W. Wilkinson). 



Northern Rhodesia : Choma, Siamambo 10. i. 1957, 2 vials, near Kafue River 

 bridge between Lusaka and Mazabuka, 18.1.1957, 2 vials, 26m. from Broken Hill on 

 Lusaka Road, 20.1.1957, 4m. N. of Lusaka, 19.1.1957 (W. G. H. Coaton). 



Southern Rhodesia : Rekomitjie, 6.x. 1964 (M. G. Bingham). 



A total of 79 nest series were examined, and all material is in the British Museum 

 (Natural History) unless otherwise stated. 



The distribution and biology of this species were discussed in an earlier paper, 

 Sands (1957). Further study and new records suggest that T. bettonianus does not 

 extend far to the south of the valley of the River Zambesi. Areas of apparently 



