^6 CLAUDE FULLER. 



Figs. 99a and B. — Illustrating the basal connection of an extra 

 principal trachea with the cubital. In fig. 99a the exti-a trachea is 

 shown in solid black ; in fig. 99b the attachment of it and the anal to 

 the cubital is illustrated. 



Fig. 100. — Illustrating the basal arrangement of the tracheae of a 

 wing-sac in which the post-costal and cubital were found duplicated. 



Fig. 101a. — A wing- sac in the same condition of development as that 

 shown in fig. 94, with an abnormal scheme due to the displacement and 

 extraordinary development of a furcate anal (in solid black). Other 

 abnormal features are : (1) The absence of the sub-costal ; (2) the 

 reduced and branchless condition of the radial ; (3) the branched con- 

 dition and displacement of the medial ; (4) the large outer branches of 

 the cubital. 



Fig. 101b. — The basal connection of the furcate anal of fig. 101a Avith 

 the cubital is shown. 



Fig. 102 a. — Wing-sac in the same condition of development as that 

 shown in fig. 94, with an ahnormal scheme due to the presence of three 

 extra principal trachea, the sul)-costal, medial, and cubital all being 

 duplicated. 



Fig. 102b. — The basal connection of the duplicated sub-costal with 

 the radial is shown. 



Figs. 103a and b. — These illustrate the unusual development of an 

 inner branch upon the base of the radial. Fig. 103b shows the basal 

 part of this unusual branch. 



PLATE VIII. 



Calotermes durbanensis. 



Wings with normal and sub-normal venation. 



Fig. 104. — Fore ; normal ; M. with furcate tip and no basal branches ; 

 R. with cross-branch to Sc. 



Fig. 105. — Hind ; normal ; M. simple, with three short basal branches. 



Fig. 106. — Hind; normal; M^. unusually subdivided. 



Fig. 107. — Fore ; normal ; M. somewhat deeply furcate, with many 

 •cross-branches between M. and R. ; offsets of R. furcate. 



Fig. 108. — Fore; normal; with M. faintly furcate and with two- 

 hooked basal branches. 



Fig. 109. — Hind; normal; M. simple, with three basal branches; 

 R. with cross-branch to Sc. 



Fig. 110. — Hind; normal; M. furcate without basal branches. 



Fig. 111. — Hind; normal; M. furcate with two curved basal branches. 



Fig. 112. — Hind; normal ; M. with an uncinate basal branch. 



