from the Transvaal and Nyasaland. 235 



16. Urothemis iridescens. 



Long. corp. 38-40 millim. ; exp. al. 68-75 raillim. ; long, 

 pter. 5 millim. 



Male. — Deep black, clothed with pruinose blue on the 

 thorax and abdomen; head shining, the inner orbits ivory- 

 white ; the rhinarium and mentum, except a black median 

 line, testaceous yellow. Wings iridescent hyaline, with 

 dusky nervures; costal nervure dusted with blue at the 

 base, and bordered with yellow beyond ; pterostigma yellow, 

 between brown nervures, and extending beyond one cell on 

 both sides ; transverse nervules mostly yellow towards the 

 costa. Fore wings with 7 antenodal and 6 postnodal cross- 

 nervules, membranule blackish. Hind wings with the first 

 cell of the lower costal space more or less marked with dark 

 brown, and with a long oval blackish-brown patch extending 

 downwards from below the upper basal cell ; its rounded 

 lower extremity, which does not extend to the inner margin, 

 though it covers the greater part of the membranule, is 

 slightly bordered with smoky yellow. 



Three specimens. 



Fort Johnston, Nyasaland (P. Rendall). 



Besides these there is a specimen from the Shire country 

 in the Museum which differs from the Nyasa specimens in 

 having seven postnodal cross-nervules on the fore wings 

 instead of six. The species is easily recognizable by its very 

 dark colour, which is unusual in this genus. 



17. Hemistigma albipuncta. 

 Libellula albipuncta, Rambur, Ins. NtSvr. p. 93 (1842). 



One specimen. 

 Delagoa Bay (Distant). 



A common African species originally described from 

 Senegal. 



Genus Stcechia. 



Eyes very large, rounded, with a slight expansion behind, 

 frontal tubercle rounded above ; the rhinarium, nasus, and 

 labrum all rather long, narrow, and transverse, the nasus 

 strongly arched downwards at the sides of the rhinarium. 

 Legs long, rather slender, with a double row of soft bristles 

 on the inside, whi< h are very long on the front tibiae ; upper- 

 side of legs but slightly hairy, and on the hind legs not at all ; 

 hind femora denticulated on the underside. Abdomen rather 

 shorter than the hind wings, moderately stout, and hardly 



