ON SOME AUSTRALIAN TERMITES. 



365 



Wings (fig. 3) with the margin cihate, membrane with very few hairs ; dark 

 brown, a Uttle fighter on costal border ; subcosta very short, hardly extending 

 beyond suture ; costa and radius well separated, the latter very dark, joining the 

 former near the apex, sometimes giving oh' beyond the middle numerous small veinlets 

 to the costa ; median of the fore-wing branching from the radius within the wing- 

 stump, moderately thick at the base, nearer to the cubitus than to the radius, branching 

 very irregularly, sometimes dividing into two before the middle and each branching 

 again into two or three, the main superior branch joining the radius near the distal 

 end of the latter or bending downwards and joining the wing margin at or very 

 near the apex, if the former, a number of small cells are formed be3^ond the junction ; 

 sometimes the branches are all curved downwards and reach the "hind margin below 

 the apex. There is always a network of veinlets between the median and radius. 

 The median vein of hind-wing branches from the radius beyond the suture, but 

 otherwise it is like that of the fore-wing ; sometimes there is an inferior branch 

 near the base which joins the cubitus about the proximal third of the wing ; some- 

 times this branch joins the second one and forms a large elongate cell, or there may 

 be a succession of cells of varying shape and size. The cubitus of the fore-wing 

 has from 10 to 16 branches, forked or simple, all of which join the hind margin before 

 the distal fourth or fifth of the wing ; that of the hind wing has from seven to nine 

 simple or forked branches, the first five to seven of which are much darker than 

 the others. 



Fig. 3. Dyepanotcrmes silvestrii, sp. n., wings of imago. 



Abdomen large, distended, with eight distinct broad dark tergites, clothed with 

 short fine hairs, and with apical and lateral margins fringed with longer yellow 

 hairs. Ventral surface of female with six visible yellow-ochre sternites, each with 

 dark lateral blotches, the fifth longer than the preceding ones, but much shorter than 

 the sixth. The male has eight distinct sternites, the fifth and sixth longest, the 

 seventh much shorter and narrower, the eighth shortest and very narrow. Cerci 

 short and stout. Styli absent in both sexes. 



Measurements* : Length with wings, 19-20; length without wings, 11 ; head, 

 with mandibles, 2-16 long; head, at and including eyes, 1-7 wide; antennae, 3; 

 mandibles, right, • 92-1 • 03 long, • 7-0 • 75 wide; left,l • 03-1 • 08 long, • 62-0 • 65 wide ; 

 prothorax, 0-94 long, 1 -64-1 -78 wide ; forewings, 15-16 long, 4 wide ; hindwings, 

 14-5 long, 4 • 5 wide ; tibia (i) 1 • 42, (ii) 1 • 55, (iii) 2-11; abdomen, 2 • 75 wide. 



* Given in millimetres. 



5296 



