The Odonata or Dracjonflies of South Africa. 406 



Chalcostephia coeonata plavib-'eons (Kirby, 1889). 



S. Afr. Mus. : 1 cJ,Lorenco Marques (4 . xii . 1911). Coll. E. B. 

 Williainsdu: 1 J', 1 ?, Natal, woodside off Unibilo Road, Congella 

 (22 . X . 1904, G. F. Leigh). 



c? . Labium ochreous ; labruin aud face light yellowish to rather 

 bright orauge ; f rous above brilliant metallic green. Thorax and 

 abdomen entirely light blue pruiuose (with pattern similar to female 

 in immature specimens). Ventral plate of first abdominal segment 

 raised in an almost vertical, deeply furcate process. Wings hyaline, 

 tips narrowly bordered with brown. Pterostigma ferruginous in 

 centra], diffusely dark bi-own in periphei-al parts. 



9 . Thoracic dorsum black with greenish-yellow markings : slightly 

 diffuse line at median suture ; broad almost quadrate spot in front 

 of ventral half of humeral suture, narrow line at superior half of 

 same suture and along ante-alar sinus. Sides greenish yellow with 

 black lines at metastigma, second lateral suture aud latero-ventral 

 margin of metepimeron. Legs black. Abdominal segments 1-2 

 greenish yellow with black rings at transverse carinae ; 3-7 black 

 with greenish or yellowish lateral spots, large on 3, small and inter- 

 rupted on 4-5, none on 6, small and rounded on 7 ; 8-10 black. 

 Margin of eighth segment folded ; vulvar scale small, triangular. 

 Wings as in male. 



(J, Abd. 24, hdw. 28, j^f. -lb mm. ? , 2?, 29, 2d. 



Found in tropical Africa, East and West, but evidently not a 

 common species. 



HEMISTIGMA (Kirby. 1889). 

 Like the preceding genus, consisting of two forms, one continental, 

 the other one from Madagascar. 



Hemistigma albipuncta (Eambur, 1842). 



S. Afr. Mus. : 12 c?, 7 ? , Loremo Marques (24, 25, 27. ix, 15 .x, 

 29. xi, 3, 4, 5. xii. 1911); 6 cJ,l6 ?, Barberton, Transvaal. Coll. 

 Ris: 4 <?, 4 9, Loreuco Marques (10, 11, 17, 25 . iii . 1911) ; 3 c^ , 

 1 ?, Rikatla, Delagoa Bay (i . x . 1913, H. Junod). Coll. E. B. 

 Williamson: 3 ^J , Natal, woodside off Umbilo Road, Congella 

 (12 . X . 1904, G. F. Leigh). 



^ . Lips and face whitish yellow ; f rons lirilliant metallic blue 

 with two whitish lateral spots. Thorax pruinose blue, sides with 

 variable pattern of light yellow ; in most specimens, even when fully 

 mature, there remain of this colour three sjwts, confluent or separated, 

 on ventral half of mesipimeron, metepisteruum and metepimeron 

 26 



