ON SOME AUSTRALIAN TERMITES. 377 



1st joint more than twice as long as 2nd ; 3rd about as long as 2nd, narrower and 

 more turbinate ; 4th a little shorter than 3rd, wider, oval, always shortest of all, but 

 rarely markedly so ; 5th longer and wider than 4th ; 6th a little shorter and narrower 

 than 5th ; 7th to 9th, inclusive, increasing gradually in length ; 10th to 14th about 

 equal to each other, very little longer than 9th ; 15th and 16th slightly longer than 

 14th, equal to each other ; joints 5 to 16, inclusive, more or less stalked ; 5 to 15 

 slightly turbinate ; 7 to 16 distinctly slender ; number and shape of joints apparently 

 very constant. 



Prothorax roughly triangular, setose, nearly flat, wider than long, anterior margin 

 slightly arcuate, bent up in the middle, antero-lateral angles rounded, sides nearly 

 straight, sloping sharply to the rounded posterior margin, hairy. Mesothorax with 

 a broad dark stripe down the middle ; wing-stumps large, setose, about two-thirds 

 as long as the mesonotum. Metanotum similar, but wing-stumps small, half as 

 long as the visible portion of the metanotum. Legs as in D. silvestrii (fig. 2). 



Wings (fig. 11) very large and broad ; fore-wing a little longer and a little narrower 

 than hind-wing, margin ciliate. Anterior margin distinctly yellow-ochre. Costa 

 and radius dark at base, becoming yellowish further on, the latter well separated 



11. Drepanotcrmes rubriceps, Frogg., wings of 

 imago. 



from the former in the proximal half of the wing, closer but distinctly separated in 

 the apical half to near its junction just before the apex. Median dark at the base 

 only, the rest very indistinct, running much nearer to the cubitus than to the radius. 

 In the fore-wing the median separates from the radius within the wing-stump, runs 

 straight to the apex of the wing, giving off five or six ill-defined superior branches. 

 In the hind-wing the separation from the radius takes place beyond the suture, 

 there are seven or eight very obscure branches, those near the base being short, 

 the others running out to the wing margin, which they join just above or below the 

 apex. The cubitus of the fore-wing joins the hind-margin a httle below the apex 

 and gives off from 12 to 15 branches, the first 9 to 12 of which are very distinct 

 and some are forked. In the hind- wing there are generally 12 branches, simple or 

 forked once or twice. Other variations are common. 



Abdomen large, showing nine distinct tergites, each clothed with fine, short, pale 

 hairs and a fringe of large golden hairs on posterior margin. Sternites with indis- 

 tinct brownish patches laterally. Cerci very short and broad. 



Measurements: Length with wings, 21-22; length without wings, 11 ; head, 

 with mandibles, 2-35 long; head, at and including eyes, 1-88 wide; antennae, 

 3 -29-3 -75; mandibles, right 0-94 long, 0-75 wide; left, 0-94 long, 0-6 wide; 

 prothorax, 1 long, 1 -78 wide; fore-wing, 18-3 long, 5 wide ; hind-wing, 17-5 long, 

 5-25 wide ; tibia (i) 1-36, (ii) 1-5, (iiif 2 ; abdomen, 3-5 wide. 



