60 ARKIV FÖR ZOOLOGI. BAND 12. NIO 15. 



and long and stiff hairs on top of the ridge and at the 

 sides; meso- and metathorax not quite so broad, witli yellow- 

 ish chitinous cross-bands; legs very long and slender, strongly 

 hairy; tibise much longer than tighs, claws long and sharp; 

 abdomen elongate, rounded, dorsal chitinous plates light 

 yellow with two rows of long, stiff, erect hairs. 



Measurements: Length of body 3,6 mm, length of 

 head 1,5 6 mm, length of snout 0,6 5 mm, breadth of snout 

 at base 0,2 1 mm, breadth of head 0,6 5 mm, length of pro- 

 thorax 0,2 5 mm, breadth of prothorax 0,4 6 mm, breadth of 

 abdomen 0,8 6 mm. 



Worker. Whitish with darker head, 



Head on the upper surface broadly blotched with red- 

 dish-brown, divided by a broad median and a broader trans- 

 versal whitish line into two broad posterior and one trans- 

 versal bandlike anterior part; clypeus whitish, broad and 

 rounded, divided by a median suture, apical part much smal- 

 ler, rounded at tip, labrum broad convex, rounded in front; 

 jaws large and broad, the left one with two apical teeth, a 

 third one near the base and an obtuse protruding angular 

 process, the right one with two apical and one median 

 obtuse tooth; antennse 15-jointed, whitish, basal joint large 

 and stout, 2nd only half so broad and half so long, 3rd 

 more rounded, slightly longer, 4th and 5th of similar 

 shape, 5th slightly shorter, 6th and following joints not 

 so rounded at the sides, tapering to the base, gradually lon- 

 ger and longer, the 14th the longest, being twice as long 

 as broad, apical joint elongate rounded at the tip; prothorax 

 ridged in front, hairy; meso- and metathorax not so broad, 

 light yellowish; legs comparatively short; abdomen whitish, 

 thickly hairy, broad and rounded. 



Measurements: Length of body 4, 30 mm, length of 

 head 1,62 mm, breadth of head 1,39 mm, length of prothorax 

 0,2 5 mm, breadth of prothorax 0, 8 o mm, breadth of abdomen 

 1,60 mm. 



A very characteristic species, easily distinguished from 

 all other Australian species by the shape of the head of the 

 soldier and the structure of the antennse. It is the only 

 large-sized Australian species with the head constricted in 

 front. As in E. magnus Frogg. the whole body is provided 

 with very long and stiff hairs. 



