316 



Annals of the South African Museum. 



9 Occiput and labium whitish. Labrum, auteclypeus, genae and 

 vertical part of frons whitish. Postclypeus, frous superiorly and 

 vertex dull ferruginous brown. Thoracic dorsum olivaceous, turning 

 to whitish on the sides and ventral surface. Legs whitish ochreous 

 with black spines. Abdomen olivaceous, turning to whitish ochreous 

 ventrally. Colour of wing membrane less intense than in male and 

 of a greyish rather than pure yellowish shade. 



Size variable, independently of origin. <$ , AM. 29, hdw. 19 to 33, 

 !>t. 2-2 mm. 9 , 30, 2O5 to 35, 2'3. 



CERIAGRION SUAVE, n. sp. 



Mus. Tervuereu : 4 g , Kapiri, Katanga (x . 1912, Legros). 

 <$ (adult). Occiput and labium whitish. Labrum light yellow, 

 geuae and vertical face of frons greenish white ; auteclypeus, post- 



FIG. 32. Ceriagrion suave, . Kapiri. Appendages, right side and 



dorsal view. 



I 



clypeus, frons and vertex superiorly light ferruginous. Thoracic dorsum 

 ochreous brown, turning gradually to very pale ochreous on the sides, 

 to whitish on ventral siirface. Legs whitish ochreous with black 

 spines. Abdomen very long and slender ; dorsum pale ochreous with 

 a pinkish shade, turning to very pale ochreous on the sides. Tenth 

 segment and appendages (see Text-fig. 32). Wings very slightly 

 tinged with greyish, pterostigma very pale ochreous with a pinkish 

 shade. 



Abd. 36, hdw. 22-5 mm. 



Besides the marked structural differences in the tenth segment and 

 appendages, this species differs from C. (jlabrutn by its much more 

 slender build, head, thorax and abdomen being conspicuously narrower, 



