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



very long and sharp, the lefb witb three teeth, one very 

 large, flat and leaf-like a little below the tip, another sharper 

 one immediately below and a smaller blunt one further down; 

 the right one with two smaller and not so prominent teeth 

 on the upper half part of the jaw; antennse springing from a 

 deep and strongly chitinized cleft, distinctly 16-jointed, basal 

 joint stout and robust. 2nd much smaller and not so broad, 

 3rd a little more than half so long, broader towards the apex, 

 4th the shortest one, 5th as long as the 3rd, 6th to 16th gradu- 

 ally longer and slender, the tip-joint rounded at the apex, 

 tips and base of all joints ligbter in colour; eyes in the shape 

 of a transverse black spöt on each side of the head a little 



behind the root of the antenna; pro- 

 thorax much more narrow than the 

 head, the front margin obtuse, slightly 

 arcuate in the centre, anterior angles 

 rounded, sides sharply tapering to the 

 apical margine, provided with some 

 stiff hairs; meso- and metathorax much 

 broader; legs comparatively short, 

 femora incrassated, tibiai slender. Ab- 

 domen parallel, slender, cerci and styli 

 small. 



Measurements: Length of body 

 Text Fig. 3. Shape of head 7,2 mm, length of head with jaws 



'"'%HtrZrat7at:r'^ ^^' lengtt oihes^å without jaws 2,8 

 Mjöb. n. sp. mm, breadth of head 1,52 mm, length 



of prothorax 0,52 mm, breadth of pro- 

 thorax 0,9i mm, breadth of abdomen 1,2 7 mm. 



Worker. Yellowish white, only the eyes and a chitinous 

 spöt in front of the antennse dark-brown. — 



Head circular round, labrum large convex, rounded at 

 the tip, completely covering the jaws, which in shape and 

 colour quite agree with those of the worker of Stolot. queens- 

 landicus Mjöb.; antennse indistinctly 13-jointed, first joint 

 stout, 2nd, 3rd and 4th indistinctly separared by sutures. 

 5th to 13th rounded, short, gradually growing longer and 

 longer, apical joint slender with parallel sides and rounded 

 top; prothorax much broader than long, slightly arcuate 

 at the front margin, anterior angles broadly rounded, sides 

 tapering to the completely rounded hind angles, sides as 



