ETHIOPIAN" NASUTITERMITINAE 105 



2 vials, 31m. from Navrongo on Tumu Road, 13.iii.1g59, 11m. from Tumu on 

 Navrongo Road, 15. hi. 1959, 6m. from Tumu on Lawra Road, 16.iii.1959, 9m. N. of 

 Lawra on Nandom Road, 18.iii.1959, 6m. N. of Wa on Lawra Road, 19.iii.1959, 24 

 and 52m. S. of Wa on Bole Road, 20.iii.1959, 2 vials, 3m. from Larabanga on Bole 

 Road, 22.iii.1959, 22m. from Larabanga on Tamale Road, 24.iii.1959 (W. A. Sands). 



Nigeria : Western Region ; Ibadan, 1937 (F. Toovey), A.M.N.H. ; Lagos, 

 Lighthouse Beach, 9JV.1957 (W. Wilkinson). Eastern Region ; Enugu, ii.1955 

 (W. V . Harris) ; Onitsha, 5JV.1957 (W. Wilkinson) ; 7 and 12m. from Enugu on 

 Onitsha Road, 2-3. hi. 1958, 2 vials, Enugu, xii.1958 (W. A. Sands). Northern 

 Region ; 28 and 44m. from Sokoto on Argungu Road, 23. xi. 1956, 3 vials, 26m. from 

 Minna on Zungeru Road, 20. xh. 1956, Mokwa, 21.xii.1956, 2 vials, 39m. from Abuja 

 on Bida Road, 24.xii.1956, Diko, 10m. W. of Abuja, 27.xii.1956, 22m. from Kaduna, 

 on Kachia Road, 30.1.1957, 5m. from Jos on Bukuru Road, 7.11.1957, 5m. from 

 Bukuru on Vom Road, 7.11.1957, 34m. from Yola on Jalingo Road, 14. v. 1957, 

 114-125111. S.W. of Jalingo on Takum Road, via Beli, 18^.1957, 2 vials, Adamawa, 

 Tiba, 10m. N.W. of Tibak, 24. v. 1957, 5 vials, and Gangoro 25. v. 1957, 32m. from 

 Damaturu on Potiskum Road, 5.vi.i957, Samaru near Zaria, 10. ix. 1957, and vi-vii. 

 1959, 3 vials, 4m. from Gboko on Oturkpo Road, 26. ii. 1958, 2 vials, and 47m. from 

 Lokoja on Kabba Road, 10.iii.1958 (W. A. Sands). 



Central African Republic : Haut Mbomu, Djema, 6° 5' N., 25 12' E., hi. 1948 

 {N. A. Weber), A.M.N.H.. 



Congo : Garamba, 25. i. 1950 (H. de Saeger), Inst, des Pares Nat. du Congo, 

 Brussels. 



Uganda : Mbale, 6.XL1937, Sererc, x.1948 (W. V. Harris). 



A total of 68 nest series were examined, and all material is in the British Museum 

 (Natural History) unless otherwise stated. 



T. occidentalis is one of the typically " Guinean " species, occurring in savannah 

 vegetation zones ranging from moist savannah patches in forest zones, to the 

 moderately dry " Sudan " savannah from the west coast across to the Sudan and 

 Uganda (Keay et al., 1959, types 8, 16, 17, and 20). Its nest and feeding habits 

 have been described elsewhere (Sands, 1961, 1961a). Though never abundant in 

 any habitat and usually very scarce compared with the other four sympatric species, 

 it is thought to be one of the most primitive of the genus, sharing with T. rapulum 

 the habit of feeding on woody material in addition to the more usual grass and leaves. 



Trinervitermes oeconomus (Tragardh) 



(Text-figs. 241, 242, 254, 255, 290-296, 384 ; Map 24) 



Eutermes oeconomus Tragardh, 1904 : 23. Type locality : Sudan, Kaka. 



Eulermes mobilis Sjostedt, 1904 : 91. Type locality : Mali, Alahina. syn. n. [ex syn. T. 



trinervius (Rambur) ; Snyder, 1949 : 332]. 

 Termes (Eulermes) oeconomus (Tragardh) Desneux, 1904a : 44. 

 Termes [Eutermes) mobilis (Sjostedt) Desneux, 1904a : 43. 

 Eutermes tchadensis Sjostedt, 1911b : 14. Type locality : Chad, " Tchari-Tchad " [probably 



Ft. Lamy area], syn. n. 



