±0^ BIOLOGY OP NORTH AUSTRALIAN TERMITES, 



Specimens in alcohol may be roughly distinguished from other described 

 Australian species by the following obvious ehaxacters: — small size, long, slender, 

 nearly black head and snout, long antennae, dark pronotum and brown banded 

 abdomen. 



Worker. (Text-fig. 20.) 



Colour: Head light yellowish-brown with two broad parallel dark-brown 

 stripes on either side of the whitish frontal suture and posterior to the trans- 

 verse suture; labrum stramineous; antennae, mouth parts, thorax, legs and abdo- 

 men pale yellowish-white. 



Head moderately broad, rounded behind; clypeus rather convex, without dis- 

 tinct longitudinal suture, sides straight, sloping to the broadly truncate apex; 

 labrum very short and broad, less than half as long as wide, widening on the 

 sides to the very broadly rounded apex. Antennae (Text-fig. 20) 15-jointed, 

 third joint shortest, fourth and fifth equal, sixth a little longer than fourth and 

 fifth. 



Thorax: Pronotum saddle-shaped, as in soldier, but lateral margins are 

 markedly produced. 



Legs slender and rather short, moderately setaceous. 



Abdomen with scanty clothing of fine setae of unequal lengths. 



Measurements : 



Total leng-th 4.50 mm. 



Head: long 1.40—1.60; wide 1.08^1.13. 



Thorax and abdomen, long 3.33. 



Pronotum: long 0.30; wide 0.70. 



Affinities. — The nearest allies to the new species (soldiers) are E. pulleinsi 

 Mjob. and E. tyriei Mjob. From the former it is easily distinguished by its 

 much darker head (dark reddish-orange in E. pulleinei) and by having only 

 one form of soldier. From E. tyriei it is distinguished also by the colour of the 

 head (dark reddish-orange in Mjoberg's species), smaller size and very distinctly 

 different antennae. It is the smallest of the very dark headed species yet 

 described from Australia and the only one of such colour with constricted head. 



LocoZ%.— North Queensland: Mareeba (G. F. Hill, 23.5.21). Described 

 from soldiers and workers found in a small, pointed mound of an undetermined 

 species of Hamitermes in open Eucalyptus forest. 



EuTERMES YARRABAHENSis Mjoberg. (Text-figs. 21-27.) 



Arkiv for Zoologi, xii., No. 15, 1920, p. 53. 



Imago. (Text-figs. 21-24.) 



Colour: Head very dark brown, postclypeus and mandibles (excepting teeth) 

 buckthorn brown, anteclypeus white, membranous; labrum yellow ochre; antennae 

 and thorax buckthorn brown; wings brown, veins darker, anterior margin yel- 

 lowish; tera'ites of abdomen brussels brown; first five sternites with obscure 

 greyish spots at each end; legs buckthorn brown. 



Head (Text-fig. 21) rather small, rounded behind to the posterior margin of 

 the eyes, moderately densely setaceous. Eyes large (.517 x .400) and prominent, 

 finely faceted, their lower margin close (.141) to lower margin of head. Ocelli 

 oval, moderately large, inserted near eye (.047). Fontanelle large, elongate, 

 forked anteriorly. Postclypeus a little more than twice as wide as long with 

 scattered reddish setae. Anteclypeus as long as postclypeus, anterior margin 



