W. A. SANDS 



Trinervitermes togoensis (Sjostedt) 



(Text-figs. 303, 304, 322-325, 351-358 ; Map 27) 



Eutermes togoensis Sjostedt, 1899 : 37. Type locality : Ghana, Trans-Volta Togoland, Ho. 

 Eutermes terricola Tragardh, 1904 : 31. Type locality : Sudan, Kaka. syn. n. 

 Termes (Eutermes) togoensis (Sjostedt) Desneux, 1904a : 45. 



Tevm.es (Eutermes) terrestris Desneux, 1904a : 45 [new name for E. terricola Tragardh, presum- 

 ably (not stated) on grounds of homonymy with Termes (Termes) terricola Sjostedt, 1902]. 

 Eutermes togoensis Sjostedt ; Sjostedt, 1904 : 27 and 87. 

 Eutermes terricola Tragardh ; Sjostedt, 1904 : 39 and 96. 

 Eutermes (Trinervitermes) togoensis Sjostedt ; Holmgren, 191 2 : 62. 

 Eutermes (Trinervitermes) terricola Tragardh ; Holmgren, 1912 : 64. 



Eutermes suspensus Silvestri, 1914 : 41. Type locality : Guinea, Kakoulima. syn. n. 

 Trinervitermes terricola (Tragardh) Sjostedt, 1926 : 326. 

 Trinervitermes suspensus (Silvestri) Sjostedt, 1926 : 329. 

 Trinervitermes togoensis (Sjostedt) Sjostedt, 1926 : 331. 

 Trinervitermes nigeriensis Sjostedt, 1926 : 333. Type locality : Mali, Belia. syn. n. 



Imago. Head capsule, central part of frons and vertex brown to dark sepia brown ; vertex 

 with two or three diverging paler streaks, middle one often indistinct or absent ; postclypeus, 

 labrum, area between eye and mandible base, and tapering streak above each eye orange-yellow 

 to brown, pale area in front of eye sometimes extending in front of ocelli and bordering posterior 

 margin of postclypeus ; antennae orange-yellow to brown. Pronotum orange-yellow to 

 yellow-brown, sometimes shaded brown at anterior corners, meso- and metanota yellow to 

 orange-yellow ; other thoracic sclerites and legs yellow. Abdominal tergites brown to dark 

 chestnut brown, darker round stigmata and paler on anterior corners, sternites pale yellow, 

 sometimes brown round stigmata. Wings translucent pale brown, subcosta and radius sector 

 yellow, partly outlined brown at base, membrane behind radius sector with yellow streak ; 

 rest of venation narrowly brown or outlined brown. 



Posterior margin of head capsule much less than semi-circular behind eyes, slightly sinuate 

 immediately behind eyes ; fontanelle small, paler than head, short Y- or inverted A-shaped, 

 sometimes with small depression in front or behind, or partly occluded posteriorly by darker 

 cuticle, lateral arms often dilated terminally ; eyes oval, weakly to moderately prominent in 

 proportion to own diameter, medium sized relative to head width, W/E index 2-5-3-2 ; ocelli 

 medium sized oval, touching eyes, to separated from them by one-third own least diameter ; 

 postclypeus moderately inflated, width 2 -3-2 -6 times length, anterior margin somewhat concave, 

 posterior margin convex, rounded, sometimes slightly indistinct in middle ; molar plate of 

 right mandible with 6-8 ridges ; antennae 15-16 segmented, rarely 17, one in five with 15 but 

 usually with basal segments partly subdivided, in 16 segmented form II, III, V, and VI are 

 subequal and longer than IV. 



Pale coloured " scent " gland on anterior margin of fifth abdominal sternite of 9 small, 

 o-35-o-64mm. wide, 0-13111111. long ; cerci of $ slightly shorter to slightly longer than width 

 across base, conical. 



Pilosity on vertex of varying length, setae not forming a " pelt " or " mat ". 

 Measurements (36 specimens from 12 localities) in millimetres. 



Range Mean 



1-43-1-76 . . 1-56 



0-50-0-63 . . 055 



0-15-0-22 X 0-20-0-28 . . 019 X 024 



0-00-0-05 • • °'°3 



1 -30-1 59 • • i-43 



0-83-1-05 . . 091 



1 -95-2 -43 . . 2-20 



14-20-21-00 . . I 7' I 4 



Head width across eyes 

 Greatest diameter of eye 

 Ocellus 

 Ocellus to eye 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 

 Length of fore wing 



