ETHIOPIAN NASUTITERMITINAE 139 



lanty in surface view, and 7-8 transverse ridges, first much larger than rest, forming a blunt 

 tooth, the more posterior ridges less prominent. Postclypeus, length slightly less than half 

 width. Fontanelle in (J, small, pale, irregularly Y-shaped ; in $, trapezoid with lateral arms 

 extending from anterior corners and slightly dilated terminally ; both sexes with smooth 

 shallowly depressed area behind fontanelle coloured as rest of head. Pilosity of head capsule 

 uneven, sockets of varying size from small to large, the latter numerous and conspicuous. 



Soldier. Monomorphic. Nose very thin and cylindrical, at most slightly tapering. Vestigial 

 mandibles without points. Head capsule not constricted. Antennae 12-14 segmented, usually 

 14. Sockets of minute setae clearly visible as pale spots scattered over entire head capsule 

 including nose. 



This genus is named to accommodate the single species B. hainesi, known only 

 from the arid areas of Cape Province, South Africa, which was first described in the 

 genus Subiditermes and latterly transferred to Trinervitermes. However, the coarser 

 pilosity with more conspicuous seta sockets distinguishes it from all known Trinervi- 

 termes, and in addition the distribution of the lighter coloured areas of the imago 

 head does not agree with that genus. In the soldier, the visible seta sockets are 

 again the main distinguishing feature, being absent in Trinervitermes, which also 

 has a dimorphic soldier caste. It is expected that when fresh winged imagos of 

 Baucaliotermes are discovered, further generic differences will become clearer ; for 

 example, in the queen secondary sclerotizations of the abdomen obscure the out- 

 lines of the " scent " gland on the front margin of the 5th abdominal sternite, but 

 it appears to be very small, and absent in the king. In Trinervitermes this gland 

 is clearly visible even when not large. 



These two genera are closely related, as is shown by the similarity of imago and 

 worker mandibles, which are distinct from other genera of the Ethiopian Zoogeo- 

 graphical Region. 



Baucaliotermes hainesi (Fuller) comb. n. 



(Text-figs. 196, 197, 336, 337, 386, 387, 396-398 ; Map 3) 



Subiditermes hainesi Fuller, 1922 : 115. Type locality : Republic of South Africa, Cape 



Province, Steinkopf, Wolfdoon, Kenhardt. 

 Eutermes hainesi (Fuller) Sjostedt, 1926 : 310. 

 Subiditermes hainesi Fuller ; Snyder, 1949 : 339. 

 Trinervitermes hainesi (Fuller) Emerson, i960 : 2. 



Imago. Previously undescribed. Head capsule chestnut brown, but probably faded in 

 morphotype queen and king ; vertex with faint diverging streaks scarcely paler than rest; 

 postclypeus yellow clouded brown posteriorly, labrum yellow. Area between eye, antennal 

 socket, and lower margin of head, extending along latter a little behind eye in rounded patch, 

 yellow-brown. Antennae pale yellow. Pronotum yellow, yellow-brown in front of pale 

 Y-shaped median patch, meso- and metanota yellow ; other thoracic sclerites and legs pale 

 yellow. Abdominal tergites brown ; sternites pale yellow-brown, brown around stigmata. 



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

 immediately behind eyes ; eyes somewhat angularly oval, moderately prominent in proportion 

 to own diameter, small relative to head width, W/E index 3-2-3-4 ; ocelli small, oval, separated 

 from eyes by under one-third to over two-fifths own least diameter ; postclypeus moderately 

 inflated, width 2-0—2-4 times length, anterior margin nearly straight, posterior margin convex, 

 rounded ; antennae broken, II and V subequal, and longer than III which is longer than IV. 



