80 CLAUDE FULLER. 



laminge and have little other interest, as no wing-sacs of the 

 nymphs of this species have been available for stndy. It is 

 thought, however, that the tracheation is analogous to that 

 of Rhinoternies except that the cubital is not regularly 

 duplicated. 



The outer field of the wing — as apart from the stump — is 

 supported by two simple parallel chitinised ribs ; these are 

 the costa and radius. There is no trace of an intervening 

 auxiliary or of connecting supports such as are found in 

 Khinotermes and Termes. Both costa and radius are, 

 whilst rigid, quite slender, and the latter tapers off before the 

 former. The wings examined fall into two groups, those in 

 Avhich a median rib is present, and those in which there is no 

 trace of such. This rib I take to be the media because of its 

 simplicity. When present in the fore wing, fig. 167 (PI. X}, 

 it is fused to the cubitus, and, when present in the hind wing, 

 to the radius, fig. 168. Of the twenty wings examined, such 

 a media was present in seven; of these, two were fore wings 

 and the rest hind wings. In the remainder the cubitus was 

 highly developed, the degree varying as between figs. 169 to 

 173. In the hind wing there is present a very inconspicuous 

 anal. It is possible that in some of the wings the cubital 

 trachea was duplicated, but this is pure speculation. 



IXf. Termes natal ensis HavUaiid. 

 Plate XI, figs. 174-179. 



As between the wings of T. natalensis (with its races 

 and such local allies as T. bellicosus, T. swazife, and T. 

 waterbergi) and those of Rhinoterme s putorius there 

 is a general likeness of structure, particularly as regards the 

 nature and arrangement of the two principal ribs, pseudo- 

 media and cubitus. Especially is this the case within the 

 laminge. Here, however, there are a number of differences, 

 some more important than others. The laminsB agree inso- 

 much that the outer margin is supported by a pair of close- 

 set parallel ribs of equal strength and rigidity, the costa and 



