from the Transvaal and Nyasaland. 239 



23. Cacergates leucosticta. 



Libellula leucosticta, Burm. Handb. Ent. ii. p. 1849. n. 8 (1839). 



Fourteen specimens, Fort Johnston, Nyasaland (P. Ren- 

 dall) ; one specimen, Delagoa Bay {Distant). 



A common species in most parts of Africa, and also found 

 in Syria. 



24. Diplacodes Lefebvrei. 



Libellula Lefebvrei, Ramb. Ins. N6vr. p. 112 (1842). 



One specimen. 



Fort Johnston, Nyasaland (P. Rendall). 

 A species found in all parts of Africa, and extending to 

 Madagascar and Asia Minor. 



25. Acisoma variegatum, sp. n. 



Two specimens. 



Fort Johnston, Nyasaland (P. Rendall). 



Long. corp. 26-29 millim. ; exp. al. 43-48 millim.; long, 

 pter. 2^ millim. 



Male. — Black, varied with paler markings. Head behind, 

 frontal tubercle, and mandibles black; face bluish black 

 above and buff below. Thorax greenish above, with the 

 sides yellowish in front and pale blue behind, rather closely 

 reticulated with black. Abdomen pale blue on the inflated 

 basal segments, with black carina? and lateral markings, and 

 a black central submacular band, which broadens hindwards 

 so as to cover most of the abdomen beyond the third segment ; 

 on the sides of the second and third segments are two black 

 dashes crossing the carina?, and below them a black mark is 

 thrown off from the lower end of each carina, the first trifid 

 and the latter bifid. There is a long buff spot on the sides 

 of segments 4-6. The upper appendages are as long again 

 as the lower, and are pale blue above and black beneath. 

 Legs black, coxa? and trochanters yellow, and the femora 

 narrowly lined with yellow. Wings hyaline, slightly clouded 

 at the tips : fore wings with 8 antenodal cross-nervules, the 

 last not continuous, and 7 postnodal cross-nervules; ptero- 

 stigma long, yellow, between black nervures, covering more 

 than one cell ; no supra-triangular nervules ; triangle free, 

 followed by two rows of cells, increasing towards the extre- 

 mity ; subtriangular space consisting of one cell : hind wings 

 with 6 antenodal and 8 postnodal cross-nervules, and stained 

 with smoky yellow at the base, especially on the inner 

 margin. 



