322 



Annals of the South African Museum. 



free margin regularly and shallowly concave, the centre of the excava- 

 tion thickened into an antero-posterior direction by a kind of bridge 

 towards the margin of the median lobe, the thickening projecting as 

 a small blunt point horizontally backward; this small bridge and 

 projection ochreous, the margin otherwise black. 



Colour of head, thorax, base and end of abdomen light greenish 

 blue (instead of pure blue in male). Postocular spots larger, bordered 

 only by a narrow black line posteriorly and united by a narrow line 

 over the occipital border. Very narrow greenish line over median 

 thoracic suture ; ante-humeral lines broader, about as broad as 

 humeral black colour, which projects very little posteriorly beyond the 

 suture. Small black dots in dorsal end of first and second lateral 

 sutures. Black lines of legs much narrower, interrupted on third 



FIG. 34. Enallagma rotundipenne, $ . Caffraria. Appendages, right 



side and dorsal view. 



femora and tibiae. Abdomen segments 1-7 as in male, but the dorsal 

 black baud comparatively narrower on the stouter abdomen ; segment 

 8 blue in anterior half, black in posterior half and a very narrow 

 transverse line on anterior margin ; broad and complete dorsal black 

 baud on 9-10. Pterostigma very light, greyish ochreous, broadly 

 lined with whitish. 



<J , Abd. 19-5, hdw. 13-5 mm. ? , 19'5, 14, pt. 3-5. 



ENALLAGMA NIGRIDORSUM (Selys, 1876). 



S. Afr. Mus. : 1 cJ, Lorenzo Marques (24. ix . 1911). Coll. Ris : 

 3 cJ,3 ? , Delagoa Bay (1892, H. Junod) ; 1 c?, Lore^o Marques 

 (25. ix. 1911). 



. Occiput light bluish grey. Labium whitish. Dorsal surface 

 of head greenish blue, marked with black, also postclypeus from base 



