314 Ainiah iif the SoiilJi African Museum. 



The males agree well with Fiirster's description of that sex ; the 

 association of Mr. Marshall's females with them is not quite certain, 

 but it may claim a good deal of probability. The colour system, stature 

 and condition of A* and Cuq is very much the same ; the difference 

 between these females and the same sex of acaciae and massaicum lies 

 in the size and especially in the well-develojied prothoracic styles. 

 They are to some degree similar to jjraetexlafuin and salisburijense, 

 though distinct by the reduction of black lines ou the thoracic dorsum, 

 which reduction goes beyond what may reasonably be expected even 

 in extreme specimens of those darker species. 



CEEIAGEION (Selys, 1876). 

 This genus embraces a small uumber of species inhabiting the 

 tropical part of the Old World. They are common and widely dis- 

 tributed in low levels and coast districts, and consequently have 

 been described comparatively early {glahnmn, coromandelianam, eru- 

 bescens, cerinorubellum). Recently additional species have been found 

 in tropical Asia and esjsecially Africa, which there is evidence to 

 suppose is the centre of the genus. One species is found within our 

 faunal limits in almost universal distribution ; a second one, from 

 Eatanga, may be advantageously described here, as its occurrence in 

 Rhodesia is probable. 



1. Wings of adult male decidedly yellow, of female variable from hyaline to 



greyish yellow. Abdomen of male bright orange, of female dull greyish 

 oclireous. Caudal end of tenth segment in male with a regulai-ly arched 

 excision ; the lateral edges of this excision projecting as blackish, 

 denticulate tubercles. The superior appendages distinctly shorter than 

 the inferior C. glabrum. 



2. Wings of adult male very light yellowish grey, of female almost hyaline. 



Abdomen of male pinkish oehreous dorsally, turning to whitish ochreous 

 at the sides. Caudal end of tenth segment in male with a similar 

 excision, but the lateral tubercles absent. Superior appendages as long, 

 or very slightly longer than the inferior. Abdomen comparatively 

 longer and narrower than in glahrum . . . . . . C. suave. 



Ceeiagrion glabrum (Burmeister, 1839). 

 S. Afr. Mus. : 1 (J , Blue Cliff, Duubrody (ii . 1912) ; 1 $ , Barberton, 

 Transvaal; 6 (J, 6 ? , M'Fongosi, Zululand (iii, iv, v . 1911, Jones) 

 9 c?, 5 9 , Lorenco Marques (24, 25 . ix, 22 . x, 1, 5 . xii . 1911) ; 1 9 

 Bulawayo (21 . iii . 1912). Coll. E. B. Williamson : 9 (J , Natal (G. F 

 Leigh) ; 5 cJ , 1 ? , Princetowu, Natal (8, 18 . xii . 1908 : 18, 22 . ii . 1909 

 id.); 2 (^, 1 $,woodside off Fm))ila Road, Cougella, near Durban 

 Natal (20 . x . 1904, 29 . iii . 1905, id.) ; 1 <?, Hilton Road, 3500 ft 



