58 ARKIV rÖR ZOOLOGI. BAND 12. NIO 15. 



0,2 5 mm, breadth of pro thorax 0,4 9 mm, breadtb of abdomen 

 0,6 7 mm. 



Soldier(smaller, Text Fig. 26 a, 28). Whitish-yellow, head 

 dark reddish orange, antennse light fuscous. 



Head very small and narrow, strongly constricted cross 

 över the middle (see Text Fig. 28) swelling out again above the 

 root of antennae, roiinded behind and at the sides, snout fairly 

 stout and tapering sharply to the tip, not so long as the 

 head itself ; antennse only 12-jointed, basal joint stout, 2nd and 

 3rd much smaller of about the same length, but the 2nd with 

 more parallel sides and the 4th tapering on the sides to the 

 base, 4th slightly longer and broader, 5th and following much 

 longer (though not twice) than broad; prothorax small, raised 

 in front, saddleshape, meso- and metathorax with yellowish 

 crossbands; legs comparatively short; abdomen rounded at 

 the sides, elongate, narrow at the base, dorsal chitinous 

 plates light yellow; cerei well developed, long. 



Measurements: Length of body 2,8 mm, length of 

 head 1,06 mm, length of snout 0,48 mm, breadth of snout 

 at base 0, 13 mm, breadth of head O, si mm, length of pro- 

 thorax 0,13 mm, breadth of prothorax 0,3 2 mm, breadth of 

 abdomen 0,6 6 mm. 



Worker. Light whitish-yellow, upper surface of the head 

 blotched with light reddish-yellow, divided by a light median 

 line on each side; basal part of clypeus whitish, convex, 

 rounded at base and sides, truncate in front, apical portion 

 much smaller, slightly protruding in the centre; labrum narrow 

 at the base, swelling out at the tip, convex; antennae 14- 

 jointed, light yellow, 3rd joint longer, 4th very short, only 

 half as long as broad, 5th and following more slender, IV2 

 so long as broad; jaws stout, triangulär, the left with 

 two apical teeth, a smaller one further below, and a strong 

 protruding basal part; the right with tliree more obtuse 

 ones and a broad black basal portion; prothorax raised in 

 front; abdomen broad and rounded. 



Measurements: Length of body 3,8 mm, length of 

 head 1,62 mm, breadth of head 0,9 9 mm, length of prothorax 

 0,2 5 mm, breadth of prothorax O.es mm, breadth of abdomen 

 1,29 mm. 



An interesting species undoubtedly belonging to Holm- 

 gren's subgenus Trinervifermes and the first Australian repre- 



