BY WALTER W. FROGGATT. 541 



nervures thick, running parallel to each other and curving round 

 at the tip, without true cross veins, but with a number at the 

 extreme tip forming irregular cells ; median nervure slender, 

 irregular, crossing the middle o£ the wing, turning downward and 

 Ijranching into three oblique foi*ks, the first again bifurcated, the 

 second simple and the last again forked ; submedian running 

 parallel with median to middle of wing, turning downwards, with 

 eight oblique branching veinlets not always regular. Abdomen 

 short, broad, rounded at the tip; cerci short and stout. 



Soldier. — Head pale yellow, darkest towards jaws which are 

 ferruginous; the rest dull white. Length 3 lines. Head large, 

 short and broad, flattened on the summit, rounded on the sides, 

 and sloping up in front from the deep antennal cleft to the base 

 of jaws; forehead truncate, with a sharp canal cut out in the 

 centre, forming a short gap with a circular spot or opening at the 

 base: clypeus concave behind, rounded on the sides and narrowest 

 in front; labrum very long, reaching to the tip of the closed jaws, 

 broad at base, contracted towards the middle and swelling out 

 into a rounded spatulate lobed tip; jaws short, stout, sharply 

 turned over each other at the apex, with two sharp teeth below 

 on the left fang and a single one on the right. Thorax smaller than 

 head, >vith the prothorax more saddle-shaped than that of the 

 winged ones; legs rather slender; abdomen short and broad, the 

 slender anal appendices showing beyond the tip; cerci hairy. 



Soldier {minor). — In this species a second ''form of soldier is 

 always present in about equal numbers with the larger ones. In 

 general structure they are similar, Ijut with all the parts more 

 slender and elongated; length 2 lines. Apical portion of head 

 bright yellow, base much lighter; head broad at the base, sloping 

 to base of the jaws, of a somewhat elongated pear-shape ; jaws 

 much elongated, slender, turning over at the tips; palpi nearly as 

 long as jaws ; antennie 16-jointed ; labrum very slender, ])ut 

 similar to that of the large soldier. 



Worker dull white, lightly tinted with yellow behind the jaws; 

 2 lines in length. Head very large and broad, sloping round at 



