from the Transvaal and Nyasaland. 237 



a yellow space. Below the shoulder-stripes is a black line, 

 meandering on the lower part of the pleura and throwing up 

 two or three irregular branches below the wings. On the 

 abdomen the carinas are mostly black, and there is a black 

 central stripe, almost coalescing on the hinder segments with 

 the black lateral borders of the abdomen. Abdomen black 

 beneath, with the sutures and a double longitudinal stripe 

 yellow. Legs black, the femora lined above with yellow. 

 Wings hyaline, stained with yellow at the base and on the 

 nodus. Pterostigma dark reddish brown, between black 

 nervures, edged by a pale line below and at the sides. Fore 

 wings with 13 antenodal and 10 or 11 postnodal cross- 

 nervules; these and the arculus are mostly yellow. Hind 

 wings with 9 or 10 antenodal and 11 postnodal cross-nervules. 



19. Orthetrum trinacria. 

 Libellula trinacria, De Selys, Rev. Zool. 1841, p, 244. 



Four specimens. 



Fort Johnston, Nyasaland (P. Rendall). 



A species previously recorded from Sicily, Egypt, and 

 Senegal. The Natural History Museum possesses specimens 

 apparently belonging to this species from Angola and Mada- 

 gascar. 



20. Orthetrum chrysostigma. 

 Libellula chrysostigma, Burm. Handb. Ent. ii. p. 857. n. 58 (1839). 



Five specimens. 



Two from Fort Johnston, Nyasaland (P. Rendall) ; one 

 from Pretoria {Distant) ; and two from Zoutpansberg 

 (Ko3Ssner). 



A widely distributed species in Africa. Easily distin- 

 guished by the black stripe bordering the uppersicle of the 

 yellow band on the pleura being slightly angulated down- 

 wards in the middle. 



21. Orthetrum caff rum. 



Libellula caffra, Burm. Handb. Ent. ii. p. 856. n. 52 (1839). 



Four specimens. 



Three from Pretoria (Distant), and one from Rustenburg 

 (Distant). 



If 1 have correctly identified this species, it is closely allied 

 to 0. tamiolatum, Schneider, from Western Asia, and to 

 0. hyalinum, Kirb., from India. Burmeister's description, 

 however, is very short and somewhat ambiguous. 



