426 AiDiids of thf South African Museum. 



Trithemis annulata (Palisot ile Beauvais, 1805). 



S. Afr. Mus: Kaapnuiiden, Transvaal (xi . 1918, Tucker); 1 9. 

 Loren90 Marques (28 . xi . 1911). Coll. Kis: 1 cJ, ih. (15 . xii . 1911). 

 Coll. Selys : 1 <J , 2 ? , Delagoa Bay. 



The area of this species is nearly the same as of arteriosa, i. e. 

 continental Africa between Algeria, Egypt and Delagoa Bay, Syria, 

 Arabia and the Cape Verde Islands ; it is recorded from Sicily and 

 Sardinia (doubtfully from continental Italy), whereas arterlosa is not 

 known to inhabit Europe ; from Madagascar also we have seen 

 annnlata but not arteriosa. In South Africa it is evidently much 

 less at home than arteriosa, and the small numlier of specimens here 

 recorded may indicate its extreme southern limits. 



Teithemis pluvialis (Fijrster, 1906). 



Brit. Mus. : 1 9 , Clnrinda Forest, Gazaland, 4000 ft. (19 . x . 1905, 

 Marshall). Coll. E. B. Williamson : 6 ^J , 4 $ , Salisbury, Mashonaland 

 (iv . 1900 ; iii, iv . 1905, id.). 



Originally described from a single male specimen from Usambara ; 

 the description applies perfectly to our specimens. The species appears 

 certainly distinct, having characters in common with annulata as well 

 as with Bistaiiti, as shown in our tables ; the stature and outline of 

 abdomen is much like Bistanti. The form of genitalia in second 

 segment of male differs from annulata (and arteriosa) by having the 

 posterior margin of the basal piece of hamule distinctly angulate and 

 the genital lobe considerably narrower, sickle-shaped, resembling the 

 same organ of T. Bistanti. None of our specimens is fully mature. 



Trithemis Kirbti ardens (Gerstacker, 1891). 



S. Afr. Mus. : 1 c? (no locality) ; 1 9 , Victoria Falls (1904, 

 W. L. Sclater) ; 1 ^J , 1 9 , Bulawayo (C. H. Pead) ; 1 9 , Salisbury 

 (23 . xii . 1911) ; 1 9 , Waterval, Transvaal (15 . iv . 1900) ; 2 cJ, 1 9 ■ 

 M'Fongosi, Zululand (iii, x . 1911, W. E. Jones); Usakos, S.W. 

 Protectorate (ii . 1920, Tucker). Coll. K. J. Morton ■ \ <$ , Macequece 

 (2.x. 1908, Miss Fountaine). Coll. E. B.Williamson: iS, Natal 

 (G. F. Leigh). 



This brilliant and conspicuous species is known from the African 

 continent south of the desert belt, although probably absent in the 

 equatorial forest zone and evidently more adapted to desert regions. 

 It is also recorded from Madagascar and the Comoro Islands. In the 

 material under discussion only a form of female with almost hyaline 



