OBSERVATIONS ON SOME SOUTH AFRICAN TERMITES. 477 



spicuous almost obsolete whorls. When pseudo XYI-jointed, 

 joints III and IV fused, with a pseudo-articulation. When 

 XVI-jointed, joints III and IV of XVII form completely fused. 



Gula much darker than ventral genge ; broad, elongate, 

 wider than ventral gente ; sides parallel, curvate, faintly 

 sinuate. Free apex short, narrowed, distal margin straight, 

 sides diverging and incurvate ; usually with a wide, shallow 

 concave depression immediately posterior to the distal margin. 



Thorax. — Tinged with yellow, semi-transparent; pronotum 

 paler than head but more coloured than the meso- and meta- 

 notum ; meso- and metanotum concoloi'ous with abdomen. 



Pronotum sellate ; cephalic margin bilobed, somewhat con- 

 vex and prolonged over head ; cephalo-lateral corners broadly 

 rounded ; sides tapering, faintly incurved, merging roundly 

 into the iu curvate caudal margin, with a distinct incurvate 

 transverse furrow debouching into two depressions ; in each 

 depression a low rounded mound ; posterior to furrow are 

 paired, convex humps. 



Mesonotum sub-elliptical, more than half the length of 

 pronotum and not as wide ; sides parallel, curvate ; caudal 

 margin incurvate. 



Metanotum sub-elliptical, shorter and wider than meso- 

 notum; sides parallel, curvate; caudal margin straight or 

 flatly incurvate. 



Legs pallid. 



Abdomen. — Oval, arched, transparent, slightly tinged 

 with yellow ; clothed with yellow-brown bristles. Contents 

 of abdomen visible ; contents opaque white and black, 

 arranged in a pattern so as to show a black median stripe, 

 which is always interrupted on the fifth dorsal sclerite and 

 always at its fullest expression on the sixth sclerite. 



Major Worker. 



Measurements. — Total length 4*5 to 7 nun. ; head-width 

 1"5 to 1*8 mm. 



Head. — Pale straw-yellow or pale yellow tinged with 

 brown; Y-suture with a white spot in fork; superior 



