SOUTH AKKHJAN 'I'EIIMITES. 97 



Fig. 113. — Fove ; sub-normal ; M. and Cu. connected by a cross- 

 branch ; M. with sinuate Ixisal branches (cf. fig. 119), 



Fig. 114. — Fore; normal; M. simple with two long basal branches, 

 forming cells. 



Wings with sub-normal and abnormal venation. 



Fig. 115. — Hind; abnormal ; M. simple but approximated to R. 



Fig. 116. — Hind ; sub-normal; M. deeply furcate and subdivided. 



Fig. 117. — Hind; abnormal; M. duplicated with both tips strongly 

 incurved. 



Fig. 118. — Fore ; abnormal ; M. and Cit. fused (probably due to 

 crossing of trachea' M. and Cm..). 



Fig. 119.— Fore; sub-normal; M. and Ci(. fused; ridges between 

 cubitus offsets recording movement of pre-existing tracheae. (Compare 

 with fig. 113.) 



Fig. 120. — Hind ; abnormal ; M. deeply furcate or duplicated ; M. and 

 Cu. connected by cross-branch (probably due to crossing of branches of 

 trachea M. and to crossing of ti-achea Cu. by these branches). 



Fig 121.— Hind; abnormal. 



Fig. 122. — Hind ; abnormal ; M. duplicated in basal half of wing. 



Fig. 123. — Fore; abnormal; Sc. fm-cate; M. reduced and united to 

 R. (probably due to a duplication of trachea M. accompanied by reduc- 

 tion) ; Cu. highly developed and connected to R. by cross-branches 

 characteristic of M. 



PLATE IX. 



Calotermes durbanensis. 

 Wings with abnormal venation. 

 Fig. 12-t. — Fore ; abnormal ; i3robal>ly owing to duplication of cubital 

 trachea ; R. with cross-branch to Sc. 



Fig. 125. — Fore; very abnormal ; condition not readily explained, but 

 due to tracheal tangle. 



Fig. 126. — Hind ; abnormal on account of independents between 

 cubitus offsets ; 31. subdivided at apex, with a long, bicurvate cross- 

 branch to R. at base. 



Fig. 127. — Fore; abnormal; M. furcate, crossing C^f., with an uncinate 

 branch at base. 



Fig. 128. — Fore ; abnormal ; M. deeply furcate : condition due to 

 crossing of tracheae. 



Fig. 129.— Hind ; abnormal; jU. reduced and fused to R.; Cu. with 

 cross-branches to R., characteristic of M. 



VOL. 4, PART 1. 7 



