378 



GERALD F. HILL. 



Soldier. — Head (fig. 12) yellow-ochre to ochraceous orange; labrum whitish 

 yellow ; clypeus with anterior margin bordered with hj'aline membrane ; mandibles 

 a little darker than head, darkest at tip ; remainder of insect pale yellow. 



Antennae very long and slender, 17- or 18-jointed; 1st joint long, rather more 

 than twice as long as 2nd and one-third wider ; 3rd as long as 2nd, but narrower ; 

 4th shorter than 3rd but equally wide, more or less fused with it ; 5th as long as 

 3rd, narrow; 5th to 9th increasing successively, all elongate, narrow; 10th to 

 18th about equal in length, a little shorter than 1st. 



Measurements: Head and mandibles (crossed), 2-82 long; head, 1-73 wide; 

 antennae, 3-57 ; thorax and abdomen, 3-29 long ; prothorax, 0-6 long, 1 -13 wide ; 

 tibia (i) 1-27, (ii) 1-45, (iii) 2-06. 



The imago differs from D. silvestrii in having a larger body, wings longer and 

 paler, lower surface of abdomen paler, much smaller and differently shaped fontanelle, 

 larger eyes, fewer joints in antennae (16 as against 18 in D. silvestrii), segmentation 

 distinctly different, head and prothorax much lighter coloured. The soldier is 

 lighter in colour than that of D. silvestrii, and the front of the head a little less rugose ; 

 otherwise there is little to distinguish them. 



Fig. 12. 



Drepanotermes rubriceps, Frogg., 

 liead of soldier. 



From D. septentrionalis, sp. n., the imago is easily separated by its larger size, 

 longer and darker wings, darker prothorax, and two less joints in the antennae. 

 From D. perniger, Frogg., as described by Mjoberg, it differs in being much larger, 

 having much longer wings, and also in the eyes, fontanelle, and antennae. 



Type series of imagines in South Australian Museum ; co-t3'pes in author's 

 collection. 



Central Australia : Tennant's Creek (/. F. Field) ; Leigh Creek, Everard 

 Ranges (S. A. White). Western Australia: Mullewa. 



Hamitermes parvus, sp. n. 



Imago. — Clypeus, meso- and metathorax, legs, abdominal sternites and tergites 

 mummy-brown ; prothorax much darker brown ; mouth-parts clay-coloured ; tarsi 

 pale stramineous ; claws pale ferruginous ; wings brown. 



