The Odonata or Drafionflipg nf South Africa. 34.9 



terminal rin.L? ; on segments 3—4 two separate points instead of this 

 latter dilation. Segments 8-1) reddish ochreous ; broad slightly 

 diffuse and sinuate latero-dorsal blackish bands ; margin of folia- 

 ceous dilatations narrowly lined with black. Segment 10 reddish 

 ochreous, dorsally obscure at base. Appendages (Text-fig. 52) — 



Fig. 52 — ilesogomphiis cognatiis, g. M'Pongosi. Terminal segments, 

 ventral and left side view. 



superiors reddish ochreous in proximal, blackish in distal half, inferior 

 reddish ochreous. Genital organs of second segment, Text-fig. 53. 



Wings hyaline. Costa lined with yellow to base of pterostigma, 

 other venation dark. Pterostigma very dark ferruginous to almost 

 black. 



Fio. 53. — Mesogomphus cognatus, ^ . M'Fongosi. Genitals, second seg- 

 ment, left side view. 



? . Very similar to male in colour ; structure of head much the 

 same. Abdomen rather robust, extension of terminal segments 

 comparatively slight, foliaceous dilatations of segments 8-9 very 

 small. Groove on ventral plate of segment 9 large (similar to 

 M. Hageiii) ; vulvar scale scarcely more than one-third the length of 

 segment 9, broadly excised to about one-half its length (none of the 



