8 ARKIV FÖR ZOOLOGI. BAND 12. N:0 15. 



Measurements: Length of body with wings 15 min, 

 lengtli of body without wings 7,5 mm; length of head 1,5 2 

 mm, breadth of head^ 1,5 7 mm, length of prothorax 0,6 

 mm, breadth of prothorax 1 mm, length of forewings 13 mm, 

 breadth of forewings 3,46 mm, length of hindwings 12 mm, 

 breadth of hindwings 4 mm, breadth of abdomen 2,i mm. 



Soldier (Plate 1, Fig. 6, Text Fig. la, 2). Body depres- 

 sed, yellowish-white, tips of jaws and eyes black, head rufous. 

 Head much longer than broad, broadest at the eyes, tapering 

 slightly towards the base, rounded at the sides, posterior 

 angles rounded, sutures very distinct, rugous in front; eyes 

 not prominent, broader than long. Labrum (Text Fig. 2 b) 

 large, eonvex, covering base of jaws, with a row of hairs at 

 the tip. Antennae (Text Fig. 1 a) springing from a cleft in 

 front of the head, 18-jointed, the first two joints stout and 

 long, the 3nd much shorter and smaller, the 4th the 

 shortest, the 5th and following gradually longer and more 

 slender, lighter coloured at the bases and the tips, hairy. 

 Jaws long and sharp, the left with two large flat and 

 leaf-like teeth and a smaller rounded one immediately below 

 the second, the right with a large flat tooth above the 

 middle and a broad, blunt one further down; prothorax 

 broad, heart-shaped, slightly arcuate in the middle at the 

 anterior margin, hairy at the sides, sloping sharply towards 

 the apical margin, in the middle of the disc near the ante- 

 rior margin with two distinct rounded impressions and a 

 median line; meso- and metathorax much broader, with a 

 lateraJ impression at each side. Legs comparatively short, 

 femora very thick, tibise more slender. Adomen flat, shining, 

 broadest in the middle, the last segment arcuate at the tip. 



Measurements: Length of jbody^ 12 mm, length of 

 head with jaws 5 mm, length of head without jaws 3,2 

 mm, breadth of head 2, 13 mm, length of prothorax 0,7 7 

 mm, breadth of prothorax 1,3 1 mm, breadth of abdomen 

 1,93 mm. 



Worker (Text Fig. 1 b). Yellowish-white, only the eyes 

 and a chitinous spöt near the root of the antennae dark- 

 brown, head light rufous. Head rounded, very nearly circular. 



^ Reckoning from external margin of the eyes. 

 ^ From tip of abdomen to tips of jaws. 



