218 Mr. F. W. Edwards' revision of 



Mj + 2 and M3 and at the angle of Ax, and smaller ones at each of 

 the lower angles of the discal cell. Tip of Ax angulated, a distinct 

 spur arising from the angle. Halteres yellow. 



Type in the British Museum. 



Loc. S. Rhodesia : SaUsbury {G. A. K. Marshall), 1 ^ 

 (type), 19. Natal: Malvern [G. A. K. Marshall), l^; 

 Umhlah {K. H. Barnard), 1 $. Portuguese East 

 Africa : Delagoa Bay, 1 $. British East Africa : 

 Nairobi {R. Ford), 1$; Kabete (T. J. Anderson), IcJ; 

 Wambogo (Alluavd and Jeannel), 2 $; lower forests of Mt. 

 Kenya {Alluaud and Jeannel), 1 (J. Nyasaland : Mt. 

 Mlanje {S. A. Neave), 3$. N. Nigeria: Beri (J. J. 

 Simpson), 1 $. Gold Coast : Bibiani {H. G. F. Spurrell), 



lc?l?. 



From its distribution it is probable that this is the species 

 referred to by Osten-Sacken (1873) as existing in the Stock- 

 holm museum. I am informed, however, by Dr. Sjostedt 

 that the original Caffraria specimens are lost. This is the 

 species which I formerly (1912) took to be S. crassicosta 

 (Speiser), but a more careful comparison of the male genitaha 

 revealed specific differences, and there is also an obvious 

 difference in the colour of the male abdomen. The 

 ovipositor of the female from the Gold Coast is figured in 

 order to show its appearance when the apical appendages 

 are more retracted. 



14. S. crassicosta (Speiser 1908). 

 Idiophlebia crassicosta, Speiser, (^. 

 Figs. 24, 25, 64 and 65. 



A rather light yellowish species. Second joint of antennae dark. 

 Dorsum of thorax with some darker patches, one just above the 

 root of the wing being the most conspicuous. Abdomen light 

 yellowish, except for pairs of brown spots at the hind corners of 

 each segment; 6th and 7th segments largely dark. Rings on legs 

 narrow but complete, normal in position. Wings with the usual 

 dark spots, which are very distinct. Tip of Ax with a rather long 

 spur. 



Speiser's original series of 2 (^ 2 $ really comprised two 

 species ; the male figured by him must be regarded as the 

 type of S. crassicosta ; the other male and one of the females 

 are described below as S. sjostedti, sp. n. The second 

 female (which is not the one figured by Speiser) may be the 



