316 Annals of the South African Museum. 



9 . Occiput and labium Tvliitish. Labrum, anteclypeus, genae and 

 vertical part of frous whitish. Postclypeus, frons 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 gi'eyish rather than pure yellowish shade. 



Size variable, independently of origin. (J, Aid. 29, Julw. 19 to 33, 

 pi. 2-2 mm. ? , 30, 20-5 to 35, 2-3. 



Ceriageion suave, n. sp. 



Mus. Tervueren : 4 (J. Kapiri, Katanga (x . 1912, Legros). 

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

 genae and vertical face of frons greenish white ; anteclypeus, post- 



FiG. 32. — Ceriagrion suave, g. Kapiri. Appendages, right side and 

 dorsal view. 



clypeus, frons and vertex superiorly light ferruginous. Thoracic dorsum 

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

 to whitish on ventral surface. 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, Mw. 22-5 mm. 



Besides the marked structural differences in the tenth segment and 

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

 slender Iiuild, head, thorax and abdomen being consjjicuously narrower, 



