ETHIOPIAN NASUTITERMITINAE 127 



4m. from Gboko on Oturkpo Road, 26. ii. 1958, 30m. from Lokoja on Okene Road, 

 8.iii.i958, Samaru, near Zaria, vi-vii.1959, 8 vials (W. A. Sands). 



Sudan : Darfur Province, Kulme, 12 30' N., 23 27' E., 6 and 26.vii.1921. 2 

 vials (H. Lymes). 



Uganda : Karamoja Distr., Toror Hills, near Kotido, 8.x. 1952 (IT. A. Sands). 



A total of 108 nest series were examined, and all material is in the British Museum 

 (Natural History) unless otherwise stated. 



T. togoensis is another of the species which extend from the extreme West Coast 

 of Africa across the " Guinean " and " Sudan " vegetation zones (Keay et al., 1959 

 types 8, 16, 17, and 20) to the Sudan and Uganda. 



Its biology and feeding habits have been described in detail in other papers (Sands, 

 1 961, 1961a). It seldom builds a mound structure of its own, being commonly 

 found in the mounds of other Trinervitermes species, or those of Cubitermes, Thoraco- 

 termes (record of Silvestri, 1914), Macroiermes, Pseudacanthotermes, and Odonto- 

 tomies. In this respect it appears to occupy a closely similar ecological niche to that 

 of T. dispar in the East and Central Africa fauna. 



Trinervitermes trinervius (Rambur) 



(Text-figs. 305-307. 332-335- 371-375. 3<\5 : Map 28) 



Termes trinervius Rambur, 1842 : jo8. Type locality Senegal. 



Termes (Eutermes) trinervius Rambur ; Hagen, 185S : 216 



Eutermes trinervius (Rambur) Sjostedt, moo : [98. 



Eutermes holmgreni von Rosen, 1912 : 224. Type locality : Liberia. syn, T. trinervius 



(Rambur) Sjostedt, 1926 : 340], 

 Eutermes (Trinervitermes) trinervius (Rambur) ; Holmgren, 1912 : 64. 

 Eutermes (Trinervitermes) holmgreni von Rosen ; Holmgren, 1012 : 65. 

 Eutermes posselensis Sjostedt, 1914b : 04- Type locality : (had, Fori Possel. syn. n. 

 Termes (Eutermes) trinervius Rambur ; Desneux, 191 5 : 9. 

 Trinervitermes trinervius (Rambur) Fuller, \<>>> : 107. 

 Trinervitermes posselensis (Sjostedt) Sjostedt, 1026 : 348. 

 Trinervitermes carbonarius Sjostedt, 1926b : 158. Type locality : Congo, Haut Uele, Mauda. 



syn. n. 

 Trinervitermes carbonarius Sjostedt ; Sands, 1957 : 2 °- 



Imago. Head capsule, frons and vertex dark chestnut to very dark sepia brown, area 

 surrounding eye, extending to point behind and to mandible base in front paler, yellow-brown 

 to brown ; vertex with three diverging paler streaks, and area in front of ocelli brown ; labrum 

 yellow, postclypeus yellow-brown, clouded with brown ; antennae yellow-brown. 1'ronotum 

 orange yellow to brown, meso- and metanota and other thoracic sclerites yellow, legs orange- 

 yellow, slightly darker at base of tibia. Abdominal tergites dark sepia brown with yellow-brown 

 margin of varying width, paler at anterior corners and sometimes in middle ; sternites yellow- 

 to orange-yellow, brown around stigmata. Wings translucent pale brown, subcosta and radius 

 sector orange-yellow, outlined brown at base, posterior outline of radius sector continuing to 

 near wing tip ; membrane behind radius sector with indistinct yellow-brown streak ; rest of 

 venation narrowly brown or outlined brown. 



