Tlie Odniiafn or Drngonflies of Sonfli Africa. 347 



coloured). Segments 1-2 discoloured ; o-7 dorsally a small spot in 

 front of anterior carina and terminal half ferruginous, laterally a spot 

 at the carina and terminal third ; 8-10 bright ferruginous, 8-9 darker 

 dorsally at base ; foliaceous dilatations blackish. Appendages ferru- 

 ginous (Text-fig. 40). Genital organs of second segment, Text-fig. 50. 



Wing light yellowish, especially along veins ; costa light yellowish 

 to base of pterostigma, other venation dark. Pterostigma dark 

 ferruginous between black veins. 



Abd. 26 + 3, hdw. 22, jjf. 3 mm. 



? . No certainty exists about the identity of this female with the 

 typical males ; but since the thoracic pattern is very much the same, 

 the identification here suggested seems probable. In this female the 

 anterior, dorsally directed branch of the obscure band on second 

 lateral suture is longer and liroader, the same colour at latero-ventral 

 border of metepimeron is more developed than in the male figured (Plate 

 IX, fig. 3). The markings of the abdomen seem somewhat different 



Fig. 51. — Mesogomphus elpidiiis, 5 • Kapiri. Terminal segments, 

 ventral side view. 



(in better condition). Abdomen reddish ochreous, a blackish lateral 

 longitudinal line on segments 2-6, dilated dorsally at the anterior 

 carina, and narrowly interrupted at the anterior margin and contracted 

 in the middle of each segment ; segment 7 ochreous in basal, dark 

 ferruginous in apical half ; 8-10 dark ferruginous. Only a slight 

 indication of the foliaceous dilations on segments 8-0. Groove on 

 ventral plate much smaller than in Hageni ; roughly triangular 

 in outline ; vulvar scale smaller, with broader terminal excision 

 (Text-fig. 51). Appendages very fine and pointed, light ochreous. 

 Yellow line on costal vein narrower than in male. Pterostigma as 

 in male. 



Abd. 32, hdw. 28, pi. 3-5 mm. 



Mesogomphus cognatus (Eanibur, 1842). 



S. Afr. Mus. : 1 (J, 1 9 . Waterval, Transvaal (10 . x, 14 . xi . 1800) ; 

 1 S , Barkley West, Cape Colony (xii . 1893, L. Peringuey) ; 1 $ , White 



