ETHIOPIAN NASUTITERMITINAE 29 



Nasutitermes din bolus (Sjostedt) 

 (Text-figs. 34-38 ; Map 5) 



Eutermes diabolus Sjostedt, 1907 : 250. Type locality : Congo, Mukimbungu. 



Entermes (Eutermes) diabolus Sjostedt ; Holmgren, 191 2 : 62. 



Eutermes (Eutermes) torquatus Sjostedt, 1924c : 494. Type locality : Congo, Stanleyville. 



syn. n. 

 Eutermes diabolus Sjostedt : Sjostedt, 1926 : 51s 

 Eutermes torquatus Sjostedt ; Sjostedt, 1926 : 321. 

 Nasutitermes (Nasutitermes) diabolus (Sjostedt) Emerson, 1928 : 477. 

 Nasutitermes diabolus (Sjostedt) ; Snyder, 1949 : 274. 

 Nasutitermes torquatus (Sjostedt) Snyder, 1940 : 299 



Imago. Unknown, but see discussion on N. camerunensis and chrysopleura. 



Soldier. Head capsule ferruginous to chestnut brown, nose ferruginous, uniform with head 

 capsule, to dark pitchy brown, almost black. Some specimens and colonies have the distal half 

 of the nose ferruginous to chestnut brown, shading paler near the base, and then a distinct 

 brown to dark chestnut brown ring around the base and extending on to the head capsule. All 

 intermediates between this and the uniformly coloured form exist, sometimes in one colony, 

 l'ronotum, antennae, legs, and abdominal tergites yellow-brown to brown, abdominal sternites 

 yellow to yellow-brown. 



Head capsule in plan view near circular or slightly oval, tapering towards front, nose weakly 

 conical. In profile, evenly concave, sometimes very slightly sinuate at base of nose, nose 

 slightly shorter to slightly longer than rest of he. id capsule, measuring from hind margin ot 

 antennal socket, angle of nose com- to 15 degrees . postmentum evenly mo lerately convex ; 

 antennae 13 segmented, II, III, and V subequal, OT I II slightly Longer, IV distinctly shorter than 

 these. Vertex with a pair of bilaterally pined long setae in some but not all specimens, and a 

 few very fine microscopic setae ; nose with four long setae at tip, .md sometimes a very lew 

 minute fine setae immediately behind them ; postmentum with a few long setae on anterior 

 margin only. 



Abdominal tergites with scattered very short setae, and longer setae on posterior margins oi 

 all except first or first and second, those on posterior tergites longer than rest ; sternites with 

 numerous shorter setae and long setae on posterior margins 



Measurements (25 specimens from 9 localities) in millimetres. 



Range Mean 



Head length to tip of nose . 1-50-1 -80 .... 1 -6o 



Head width 

 Depth of head capsule 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



o -80-1-00 



0-58-0-70 



0-41-0-50 



0-15-0-20 



098-1 1 8 



Variation. The shape and size of the soldier caste is less variable than in some other species, 

 but the colour pattern is highly variable. The form with the banded nose was described 

 separately by Sjostedt (1924) as N. torquatus. 



087 

 o-6i 



o-45 

 018 

 1 05 



References to N. torquatus by subsequent authors (Emerson, 1928, and Sands, 

 1957) are not correct, and are listed in the appropriate synonymies. The darker 

 coloured and longer-nosed specimens of N. lujae have sometimes been confused with 

 this species, but they are distinguishable by the more hairy nose tip and the less 

 evenly concave profile. N. lujae also always has a pair of bilaterally placed setae 

 on the vertex, and no smaller hairs have been detected in this position. N. latifrons 

 is sometimes similar in general shape, but is easily distinguished by the hairy 



