OBSERVATIONS ON SOME SOUTH AFRICAN TERMITES. 463 



Frontal area much depressed with a median, elongate, 

 triangular and transversely wrinkled mound ; mound with its 

 apex a little anterior to the fontanelle and its base upon the 

 cephalic margin of the clypeus; lateral to this mound are 

 fairly deep converging grooves; lateral to its apex and in the 

 depression paired suppressed mounds. 



Eyespots pale and insignificant. 



Ocelli represented by a mark which has the appearance of 

 a closed eye. 



Clypeus with a cephalic margin (epistome) three-sided, 

 distal margin straight or a little incurvate ; distal corners 

 oblique and straight ; sides of clypeus incurvate and parallel. 



Labrum concolorous with head ; sides curvate, tapering, 

 but almost parellel, apex with a large white cordate lingula 

 (epipharyngeal ) . 



Mandibles black throughout; powerful; simple; long and 

 tapering; incurved and upcurved ; with tapering bases which 

 penetrate deeply into epicranium. Left broader than right, 

 larger and longer (L. 8*5 mm. ; R. 3"2 mm.) ; distal half of 

 inner margin of left faintly crenulate, proximal half with a 

 large produced piece having two rounded points at either end 

 and the margin between these incurvate ; proximal to this a 

 small process. Right with inner margin entire and distinctly 

 elbowed at one-third its length. 



Antennas XVII-jointed ; I and II reddish, the rest dark 

 brown ; each with a distal ring of pale colour and with yellow- 

 brown bristles ; length about 6 mm. ; joint I cylindrical, about 

 twice the length of II (8 : 4), with a whorl of small spines; 

 II anchylosed to I, cylindrical, short, nearly wide as long, with 

 minute almost obsolete spines ; III clavate and long, as long 

 as LI X 2*5 (9 : 4) and longer than I, bristled ; IV as long as 

 I, bristled ; V to XII about equal and a little shorter than IV 

 (7:6); XIII to XVI tapering and becoming shorter ; XVII 

 longer than XVI (6:5); IV to XVI elongate, obconic, about 

 half as wide as long, bristled. XVII elongate, oval ; apex 

 convex, truncate ; bristled. Joints III and IV of the worker 

 XVIlI-jointed antenna fusing to form III of the XVII-jointed. 



