The Odonata or Dragonflies of South Africa. 321 



The position of If., and M I( , relatively to post-nodal cross-veins 

 shows considerable variability, the extremes of the series being 



5 + 2.5 + 2 6 + 8.6 + 3" 



. 9 4_i_Q alic * 5X3 JT+V lllos t regular position apparently 



5 + 3.5 + 3 

 teiug 4+37-4+8' 



ENALLA.GMA ROTUNDIPENNE, u. sp. 



Mus. Stockholm: 1 <J,Caffraria (Wahlberg). S. Afr. Mus. : 1 $ 

 not dated, but most probably from M'Fongosi, Zululand. 



These two specimens belong most probably to the same species a 

 form not otherwise represented in the material examined. They are 

 similar in stature and in colour scheme to E. nigridorsum, but the 

 appendages are rather widely different, and both sexes are distinct by 

 their wings broadly rounded apically, the pterostigma being dilated 

 accordingly in the antero-posterior dimension. Cuq half-way between 

 first and second Anq or slightly more distally. A* proximal to Cuq by 

 almost twice the length of Cuq. Arculus very slightly distal to second 



n 



cJ. Occiput light blue, black spots at the foramen. Labium 

 whitish. Dorsal surface of head, a rather broad line at base of 

 labrum, postclypeus entirely, froiis and vertex to half-way between 

 anterior ocellus and postclypeus light blue marked with black ; blue 

 postocular spots narrow, cuneiform, no blue line on occipital border. 



(Prothorax damaged.) Thoracic dorsum black; complete, narrow, 

 blue ante-humeral lines, less than one-half the breadth of median 

 black of corresponding side. Humeral black posteriorly to first 

 lateral suture in dorsal third slightly less ventrally ; black dot in 

 dorsal end of second lateral suture. Sides otherwise blue, ventral 

 side whitish. Legs very light greenish ; femora broadly, tibiae 

 narrowly lined with black externally. 



Abdomen segments 1 to middle of 3, 8 to 10 blue, middle of 3 to 

 7 yellowish, marked with black ; very broad dorsal baud (almost as 

 in nigridorsum), very narrow, dorsally interrupted light basal rings 

 on 3 to 6 ; 8 entirely blue ; 9 terminal transverse black spots ; dorsum 

 of 10 broadly black. Appendages (Text-fig. 34). 



Pterostigma grey, rather broadly bordered with blackish, slightly 

 larger and darker in front than in hind wing. 



9 Sides of prothorax greenish blue, dorsum black with two large 

 dorsal posterior bluish spots and the anterior margin broadly blue. 

 Posterior lobe erect to an angle of about 60, narrow, trapezoid, the 



