262 Annals of the So^lth African Museum. 



The peculiar structure of the head, the very characteristic venation 

 of the narrow, petiolate wings, as represented in our Plate VI, fig. 6 ? 

 are distinctive features of the " Lc'gion." This group is represented in 

 tropical Asia by the large genera Khinocypha and Micromerus, in 

 Africa by the almost equally numerous genus Libellago. 



Most of the species are found in tropical Western Africa, but they are 

 very imperfectly known, because specimens are not numerous in collec- 

 tions and the existing desci-iptions are in a state of hopeless confusion. 

 The only species found in South Africa has a wide distribution in 

 East Africa, but does not occur, as it seems, on the other side of the 

 continent. The generic name will eventually have to be altered, as it 

 seems that the name Libellago must, according to nomenclatorial rules, 

 be applied to what is now universally accepted as Micromerus 

 (Rambur, 1842) ; but the present paper is not the place for such an 

 alteration. 



A larva from the Tanganyika region (Mus. Tervueren) agrees in all 

 essential points with another one figured by Karsch ('Berlin. Eutom. 

 Zeitschr.,' xxxviii, tabs. 1, 2, 3, 4, fig. 11, 1893) ; it is almost certainly 

 a Libellago. 



The Tanganyika nymph is reserved for another publication. 



LIBELLAGO CALIGATA (Selys, 1853). 



S. Afr. Mus. : 1 c? , Kranspoort, Pretoria district, Transvaal 

 (17. xii . 1906) ; 1 rf, Waterfall, Transvaal (5 . xii . 1901) ; 25^, 

 15 9 , M'Fongosi, Zululand (ii, iii, iv, v, x, xi, xii . 1911 (W. E. Jones) ; 

 Acornhoek, Transvaal (xii . 1918, Tucker). Mus. Stockholm: 2 $ , 

 Zululand (x . Tragardh). Coll. K. J.Morton: 1 c? , 1 9 , Umzinto, 

 Natal (26 . iv . 1909, Miss Fountaine). Coll. E. B. Williamson : 10 <J , 

 9 9 , Priucetown, Natal (8, 14 . xii . 1908 ; 5 . i, 16, 19 . ii, 11 . iii . 1909 ; 

 16, 21 . ii . 1910, G. F. Leigh). Coll. Ris : I $, Amans, Natal 

 (23. iii . 1908, H. Junod). 



J (adult). Head deep black. Labium reddish brown, darker at 

 the tips. Dorsally three yellowish spots ; a larger one from the 

 occipital margin almost to the posterior ocelli and in two lateral points 

 to the base of antennae ; two small triangular ones between the 

 median spot and the eyes, nearly in the position of the " postocular 

 spots " of many Agrionidae. 



Thoracic dorsum deep black; a narrow white line on the medi;in 

 suture, and a triangular white spot in the antealar sinus and a broad 

 forked yellowish band at the humeral suture ; the lateral branch 

 touching the narrow black line of this suture nearly for its whole 



