94 CLAUDE FULLER. 



shown in solid black, those furthei- away are shaded ; the thickening of 

 the margin is also indicated; c. costal thickening; i?., radial ; Ps. M., 

 pseudo-medial ; Cu., cubital. 



Figs. 62a and b. — These figures illustrate the migration of a trachea 

 from the thickening that forms about it. 



Figs. 63a and b. — The figures illustrate the movement of the cubital 

 offsets from thickenings and the forming of new bands about them in 

 their new positions. 



Fig. 64. — The wing of T. natalensis as it appears before and after 

 the last ecdysis. Viewed from below. 



Figs. 65a to 65k. — The various stages of the unfolding of the wing of 

 T. natalensis (side views; the diagrams are all of the same relative 

 enlargement). Fig. 65a represents the condition shown in fig. 64 ; figs. 

 65b. c, d, e, the conditions seen in figs. 67a, b. Fig. 65k represents a 

 fully expanded wing. 



Fig. 66. — T. natalensis ; imago with wings unfolding. 



Figs. 67a, b, c, d. — T. natalensis; wings in various stages of un- 

 folding ; A, b, c, from above ; D, from below. 



Fig. 68. — Calotermes durbanensis; basal half of freshly unfolded 

 and transparent wing, showing the thickenings then present and (in 

 solid black) the Ivimina ; sr.. the cross-rib, with lumen, connecting post- 

 costa to costa. 



Fig. 69. — Diagram representing the stretclied-out condition of the 

 spiral of the lumina of fig. 68. 



Figs. 70a and b. — Hodotermes karrooensis; fig. 70a, wing-stump 

 and base of lamina of fore wing ; fig. 70b, the same of hind wing. 



Fig. 71. — Hodotermes viator; illustrating the abnormal position 

 of pseudo-media (in solid black) in a particular hind wing. 



Figs. 72a and b. — H. viator; illustrating the abnormal duplication 

 of the sub-costa (in solid black). 



Fig. 73. — H. viator ; illustrating the deep furcation of the sub-costa 

 (in solid black). 



Fig. 74. — H. viator; illustrating the deep furcation of the post- 

 costa (in solid black). 



Fig. 75. — Hodotermes transvaalensis ; portion of wing-base 

 illustrating the absence of a jjseudo-media. 



Fig. 76.— H. transvaalensis; illustrating the duplication of the 

 pseudo-media (in solid black). 



Fig. 77. — Hodotermes viator ; illustrating an abnormally well- 

 branched condition of the sulj-costa (in solid black). 



