450 Ami ah of the South African Museum. 



EXPLANATION OF PLATES V XII. 



PLATE V. 



FIG. 



1. Hemianiax cphippiger. Venation of Anisoptero,. Lettering of veins in front 



wing', of spaces in hind wing. C. Costal. Sc. Subcostal. R + M. Common 

 stalk of radial and medial. Cu. Common stalk of cubital. A. Anal. 

 R. Radial. Rs. radial sector. Rsa Second branch of radial sector (in 

 Aeschniiiif). Rspl. Radial supplement. B. Bridge from base of radial 

 sector to medial. J/i - 4 . Common stalks and branches of medial. Hspl. 

 Medial supplement. Ci and . : . Branches of cubitus. Anq. Antenodal 

 cross-veins. Pnq. Postnodal cross-veins. Arc. Arculus. Nod. Nodus. 

 Pt. Pterostigma. c. Costal, sc. Subcostal, m. Medial, cu. Cubito-anal. 

 /.Triangle, ht. Supra-triangle. aZ. Divisions of anal loop, df. Discoidal 

 field, mbr. Membranula. ^-3. Branches of anal vein in hind wing. 

 oblr. Oblique vein at distal end of bridge, bridge between o alu l O- 



2. Metac.ncmis valida. Venation of Zygopi era. Lettering as in fig. 1. Apart 



of anal vein between petiole of wing and C 2 . Q. (Quadrangle. 



PLATE VI. 



FIG. 



1. Libellula fulva. Nymph (European). Tracheation in nodal region: 



origin and crossing of Bs, and formation of bridge. 



2. Libellula fulva. Nymph. Tracheation in triangular region : inflection of 



cubital fork (front wing). 



3. Libellula fulva. Nymph. Tracheation in trangular region : inflection of 



cubital fork (hind wing). 



4. Caloptcryx virgo. Nymph (European). Tracheation: absence of radial 

 crossing and inflection of cubital fork (left side). 



5. Ischiiura elcgans. Nymph (European). Tracheation: reduced form of 



zygopterous venation (right side). 



6. Libellago caligata. M'Fongosi. Upper <J , lower ? . 



7. Phaon iridipennis. . Natal. 



8. Lcstes plagiatus. ? . M'Fongosi. 



PLATE VII. 



FICr. 



1. Chlorolestes conspicua. $. Cape. 



2. ?. Cape. 



3. peringueyi. $. Ceres. 



4. fasciata. $ . Albert District. 



5. tessellato. . Cape. 



6. longicauda. $ . M'Fougosi. 



