ERIC MJÖBERG, ISOPTERA. 85 



Soldier (Text Fig. 42a). Head light yellow, tips and 

 median tooth of jaws darker. 



Head distinctiy longer than broad, rounded behind and 

 on the sides, convex on the summit sloping down in front, 

 eyes in shape of a darker rounded spöt on each side behind 

 the root of antennae; clypeus small, slightly emarginate in 

 front, giving the impression of being bilobed; labrum longer 

 than broad, rounded on the sides, tapering to the rounded 

 tip, with numerous hairs; jaws fairly broad and curved, with 

 an obtuse median tooth near the middle; antennae 15-jointed, 

 slender, light yellow, basal joint about twice as long as 2nd, 

 3rd very small, showing tendency to coalesce together with 

 the 4th, whieh is slightly shorter than the 2nd, 5th of about 

 the same length as 4th, 6th and 7th distinctly longer, 8th 

 to 14th gradually a little longer, though not quite twice as 

 long as broad, 15th the longest, twice as long as broad, taper- 

 ing to the tip; pro thorax ridged in front, tapering on the 

 sides to the rounded hind margin: legs of moderate size; 

 abdomen elongate, rounded, pellucid, allowing the dark con- 

 tent of the intestines to shine through. 



Measurements: Length of body with jaws 4,5 mm, 

 length of head with jaws 1,8 1 mm, length of head without 

 jaws 1,43 mm, breadth of head 1,04 mm, length of prothorax 

 0,38 mm, breadth of prothorax 0,63 mm, breadth of abdomen 

 1,33 mm. 



Worker. Body whitish with light reddish-yellow head. 



Head rounded on the sides and behind, basal part of 

 clypeus rounded behind and at the sides, truncate in front, 

 apical portion strongly rounded, labrum broad, rounded; 

 eyes in shape of a dark rounded little spöt behind the root 

 of the antennse as in the soldier; jaws as in the soldier but 

 smaller, the dentation very similar; antennae 15-jointed, 3rd 

 joint nearly as long as 2nd, 4th and 5th rounded, about as 

 broad as long, the following gradually longer, 12th, 13th and 

 14th twice as long as broad, 15th longest, more than twice as 

 long as broad, sharply pointed; prothorax ridged as on the 

 soldier; abdomen rounded at the sides, pellucid. 



Measurements: Length of body 5 mm, length of head 

 1,43 mm, breadth of head 1,2 mm, length of prothorax 

 0,3 4 mm, breadth of prothorax 0,8 6 mm, breadth of ab- 

 domen 1,5 1 mm. 



