ETHIOPIAN NASUTITERMITINAE 



69 



Abdominal tergites with very sparse scattered minute hair-like setae slightly longer on pos- 

 terior margins ; sternites with denser short setae and longer setae up to 3 times length of short 

 on posterior margins. 



Measurements (30 specimens from 19 localities) in millimetres. 



Range Mean 



Head length to tip of nose . 1-15-1 -50 .... 1-36 



Head width . 

 Depth of head capsule 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



0-59-0-86 .... 075 



0-43-0-61 .... 054 



0-38-0-47 .... 043 



0-15-0-21 .... 017 



0-94-1-23 .... 1 06 



Variation. In the imago the variation was chiefly in size with proportions fairly constant. 

 The soldiers have proved highly variable in size, colour, and head profile, but the range has been 

 found indivisible. Angularity of the posterior margin of the head is commoner at the western 

 end of the distribution range. 



The relationship of this species to F. coatoni and F. contractus are mentioned under 

 those species. 



Type Material. Guinea : Kakoulima (9 40' N., 13 25' W.), 12.viii.1912 (F. 

 Silvestri), syntype soldiers, type colony, F. tenebricus (Silvestri), Silvestri Coll., Lab. 

 Zool. Sc. Agr., Portici, and A.M.N.H. 



Congo : near Yakuluku (4 20' N., 28 50' E.), xii.1911 (H. Lang, J. P. Chapin) 

 paratype soldier, type colony, F. suffuscus (Emerson), A.M.N.H. 



Other material. Guinea : Nimba Mountains, 1957, 10 vials (M. Lamotte), Inst. 

 Franc. d'Afr. Noire, Dakar. 



Ghana : Yeji, 10.xii.1926 (A. W. J. Pomeroy) ; 60m. N. of Ejura on Tamale 

 Road, 24. ii., 12m. S. of Tamale on Kumasi Road, 26.iL, 4m. from Daboya on Tamale 

 Road, 28. ii., 55m. from Tamale on Larabanga Road, 3.iii., 4-151T1. from Gambaga on 

 Walewale Road, 5-7. iii., 25m. S.E. of Gambaga on Yendi Road, 14m. from Gambaga 

 on Bawku Road, 6. iii., 20m. from Bolgatanga on Tamale Road, 9. iii., 10m. N. of 

 Bawku, n. iii., 11m. from Tumu on Navrongo Road, 15. iii., 40m. from Tumu on 

 Lawra Road, i6.iii., Lawra and 9m. N. of Lawra on Nandom Road 18. iii., 6m. N. of 

 Wa on Lawra Road, 19. iii., 24-521x1. S. of Wa on Bole Road, 20. iii., 3~23m. from 

 Larabanga on Bole Road, 21-22. iii., 6m. N. of Wangasi-Turu on Tamale Road, 

 27. iii., 7m. from Nkoranza on Ejura Road, 28. iii., and 25m. N. of Wenchi on Bamboi 

 Road, 30. iii. 1959 (W. A. Sands). 



Nigeria : Western Region ; Olokemeji, xi.1912 (F. Silvestri), A.M.N.H. Eastern 

 Region ; Onitsha, 20. i. and 5JX.1957 (W. Wilkinson) ; 7~i2m. from Enugu on 

 Onitsha Road, 2-3. iii. 1958 (W. A. Sands). Northern Region : 20m. from Zaria on 

 Funtua Road and 30m. from Funtua on Yashi Road, 14. xi., 25m. from Katsina on 

 Daura Road, 19. xi., 71m. from Gusau on Sokoto Road, 22. xi., 2 vials, 45m. from 

 Sokoto on Argungu Road, 23. xi., Zaria, 4.xii., 33m. from Kaduna on Zungeru Road, 

 20.xii., 16m. S. of Zungeru on Bida Road, 2i.xii., Bida, 23.xii., 39m. from Abuja on 

 Bida Road, 24.xii., and Gwagwa Forest near Abuja 28.xii.1956, 5m. from Jos on 

 Bukuru Road, 6.ii., 42-71x1. from Jos on Wamba Road, 8.ii., 40m. from Jos on 

 Bauchi Road 11. ii., Bauchi, and 25m. from Bauchi on Jos Road, 12-13.il., 18, 20, 

 and 29m. from Jos on Pankshin Road, 14.il., 3-iv., and 25.vii., 16m. from Kaduna 



