The Ocfnnrtli-t or 



///,'* of Sonf/i Africa. 



349 



terminal ring; on segments 8-4 two separate points instead of this 

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

 diffuse and sinuate latero-dorsal blackish Viands ; margin of lilia- 

 ceous dilatations narrowly lined with black. Segment 10 reddish 

 ochreous, dorsally obscure at base. Appendages (Text-tig. W) 



FIG. 52 Mesogomphus cognalus, . M'Fongosi. 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. 



FIG. 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. Hageni) ; vulvar scale scarcely more than one-third the length of 

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



