The Oilonafa or Dragon.flies of South Africa. 435 



lined with black ; broad black dorsal spots on segments 8-]0. Female : 

 Face dull ochreous ; frons orange, superiorly about basal half black with 

 metallic blue reflection. Thorax and abdomen lighter in colour than in 

 male. J , AM. 32, hdw. 40, pt. 25 < 2 mm. ? , 30, 41, 2'5, 2 T. limbala. 



* 



TRAMEA BASILARIS (Palisot de Beauvais, 1805). 



S. Afr. Mus.: l<^,Lorenco Marques (J. da Costa); Grootfontein, 

 Tsumeb, Saudup, Ondougua, S.W. Protectorate (i . 1920, Tucker, 

 aud ii . 1921, Barnard). Coll. E. B. Williamson: 1 ^ ? in cop., 

 3 c?, Salisbury, Maslionalaud (xi . 1900, Marshall). Coll. Sclys : 

 2 g , 3 ? , " Afrique australe." 



Known from interfcropical Africa, East and West, and from some 

 islands of the Indian Ocean in a form of little variability. A slightly 

 different form from India and Ceylon. 



TRAMEA LIMBATA (Desjardins, 1832). 



Coll. Si'lys ; 3 cJ, Delagoa Bay. Coll. K. J. Morton : 1 ^ , Natal. 



T. li>biita,ui the wide application given to this name by the writer, 

 means a species highly polymorphic in colour of wing base and of 

 frons, but structurally homogeneous, ranging between Senegal in W. 

 Africa and the islands of Samoa in the Pacific Ocean throughout the 

 inter-tropical region. Forms from continental Africa were named 

 T. continental-is by de Selys, those from Delagoa Bay and Natal T. 

 limbata a 2 by the writer. 



UEOTHEMIS (Brauer, 1868). 



A genus of tropical African and Asiatic distribution, including a 

 small number of forms. Similar in outline and facies to Crocothemis, 

 but there is no real affinity to that genus ; neural details and the 

 genital structure of both sexes demonstrate close relations to the 

 Tramea group. 



<J. Thorax and abdomen wholly black, with dark greyish-blue prui- 

 nosity, not covering on abdomen a broad mid-dorsal black line, which is 

 widened at terminal joint of each segment. Labium ochreous with 

 indistinct median fuscous band ; labrum black ; anteclypeus light oli- 

 vaceous; postclypeus and frons black, narrowly light yellow at side-. 

 Wings hyaline, very lightly stained with yellowish, narrowly and diffusely 

 brownish at tips. Base of hind wings with a deep blackish-brown spot of 

 variable size, in most specimens in c and sc half way to Anq { , vestige in 

 JH, in en to Cuq or slightly beyond, to somewhat more than half way 

 between apex of menibranule and anal angle ; limits of spot indented 



