14 ARKIV FÖR ZOOLOGI. BD 12. N.O 15. 



well developed, running parallel with the anterior margin^ 

 very nearly reaching the tip of the wing and sending out 

 about 6 oblique nervures forwards; mediana (4th) branches 

 off frora the basal portion of radius sector, runs out to 

 the tip and is connected with it by 8 — 10 cross-veinlets ; 

 cubitus (5th) chiefly as in the forewing, the reticulation be- 

 tween mediana and cubitus a little fainter. Legs rather 

 short and robust, thighs comparatively short and thick, tibiae 

 short, slightly bent, with 3 strong sharp spines at the apex, 

 the interiör one longest and sharpest, all very finely serrated, 

 the plantula small; abdomen fairly broad, slightly flattened 

 on the dorsal side, rounded at the apex; cerci and styli 

 small and short. 



Measurements: Length of body with wings 25,5 mm, 

 length of body without wings 11 mm, length of head 3 mm, 

 breadth of body 2,6 mm, length of pro thorax 1,5 mm, breadth 

 of prothorax 2,8 mm, length of forewings 21 mm, breadth 

 of forewings 5,6 mm, length of hindwings 19,6 mm, 

 breadth of hindwings 6,5 mm, breadth of abdomen 3,5 mm. 



Soldier (Plate 1, Fig. 4). Strongly built, yellowish white, 

 head rufous, jaws black. 



Head very large, cylindrical, anterior angles more obtuse, 

 posterior rounded, slightly flattened on the summit, sloping' 

 down behind clypeus and there rugous with a median, not 

 very deep furrow, shining; clypeus broad, depressed in the 

 middle, not distinctly marked off from the forehead, with 

 irregular, rugous sculpture, labrum small, rounded, broadest 

 at the base, projecting to the posterior tooth of the right 

 jaw, antennse 19-jointed, very hairy, springing from a 

 round cleft, basal joint short and stout, 2nd shorter and not 

 so broad, 3rd distinctly longer than the surrounding joints, 

 4th short, broader than long, 5th — 12th more rounded, 13th 

 — 19th gradually growing longer and slender; jaws very stout 

 and strong, black, curving inwards and crossing över each 

 other not far from the tips, the left one with two teeth of 

 about equal size and shape a little below the tip and a rounded 

 one further down, which sometimes gives the impression of 

 a double tooth, the right one with a very large projecting 

 tooth near the middle of the jaw and a more obtuse one 

 further down; prothorax not so broad as the head, more 

 than twice as broad as long, rounded at the sides and at 



