ERIC MJÖBERG, ISOPTERA. 



51 



and E. triodice Frogg., but unfortunately the descriptions of 

 these species are too vague and far too general to permit of 

 an absolutely certain identification. Judging from Froggatt's 

 descriptions, however, the new species differs from E. hastilis 

 Frogg. by its larger size of the soldier, its 14-jointed antennae 

 with the 2nd joint only a third part in length of the basal one 

 (in E. hastilis Frogg. 13 joints and the »2nd about half the 

 size» of the basal one), the larger size of the worker, etc. From 

 E. triodice Frogg. it differs by the somewhat larger size and 

 much lighter colour of the head in the soldier, the larger- 

 sized worker, its dentition of jaws and the 15-jointed antennae. 

 E. magnus Frogg. from North Australia is of larger size and 



Text Fig. 23. Shape of head of Eutermes pyriformis Frogg. 

 a from the side, h from above. 



has a much stouter basal joint of the slightly stouter antennae, 

 a broader and much darker head, broader mouth etc. 



I have specimens (from the nest) from the vicinity of 

 Derby in North West Australia. 



^ 21. Eutermes eoaleseens n. sp. 



Soldier (Text Figs. 17, 24). Of the same size and general 

 appearance as E. kimherleyensis Mjöb., but the head diffe- 

 rently shaped and its colour more orange-reddish, rostrum 

 broader and stouter at the base and the antennae not so 

 long, but more slender, with the 3rd and 4th joint mostly 

 coalescing. 



