430 Annals of ilie South African Museum. 



Forest, Gazalaiul, 3600-4000 ft. (3, 7, 8, 14, x . 1905, Marshall). 

 Coll. K. J. Morton: 1 ^ , Macequece (2.x. 1908, Miss Fountaine). 

 Coll. R. Martin : 1 ? , Natal. Coll. E. B. Williamson : 1 $ , Hilton 

 Road, 3800 ft,, Natal (28, xii . 1909, G-. F. Leigh). Mus. Tervueren : 

 2 , Kapiri, Katanga (x, xi . 1912, Legros). 



The male was described by Forster as Zygonyx Icomatina from 

 Komatipoort, Transvaal. No other records are known to the writer. 

 Frcm what is known, this species is decidedly South African. 



OLPOGASTEA (Karsch, 1895). 



Allied to the preceding genus and restricted to tropical Africa and 

 Madagascar ; the small number of species is very imperfectly known. 



Abdomen a little longer than hind wings, very much widened at base, 

 extremely slender from segment 3 posteriorly. Teeth of tarsal claws 

 very minute, even absent in some specimens. Male : Labium light 

 yellow with median lobe black ; labrnm black ; ante- and post-clypeus 

 yellow with a black line at the suture between both pieces ; frons above 

 brilliant metallic blue with a ferruginous ground colour showing through, 

 narrowly yellow at anterior margin. Thorax brilliant metallic green 

 with light yellow markings ; incomplete line at median suture ; ante- 

 humeral lines to two-thirds height ; transverse lines at ante-alar sinus ; 

 two round spots in front of humeral suture ; two large elliptical spots 

 on mesepimeron ; ventral band and dorsal round spot on second lateral 

 suture ; large, roiighly triangular anterior spot and two small round 

 posterior spots on metepimeron ; round spots on mesinfraepisternum and 

 metinfraepisternum. Legs black, abdomen black with yellow markings ; 

 latero-ventral spot and dorsal ring on segment 2 ; complete narrow 

 anterior ring on 3 ; segments 4-7 with small, dorsally interrupted basal 

 ring, slightly elongate on 7. Genital lobe produced into a large con- 

 torted spine. Wings stained with greenish yellow from triangular 

 region distally ; second pair deeper yellow in the region between t, nodus 

 and anal margin; apex narrowly and diffusely lined with brown ; second 

 pair with deep brown basal spot, vestige in sc, almost to Cuq in cu and 

 one or two cells at membranule. Pterostigma dark brown ; membranule 

 black, lo? Aiiq. Female very similar to male. $ ? , Abd. 43, hdw. 42, 



pt. 2-5 mm 0. lugubris. 



Abdomen distinctly shorter than hind wing, much widened at base, 

 more robust posteriorly than in preceding species, and slightly fusiform. 

 Teeth of tarsal claws of ordinary size, shorter than the point. Male ; 

 Labium and labrum ochreous ; face and frons very light olivaceous ; at 

 base of frons a broad black band with metallic blue reflections. Vertex 

 black at base, light olivaceoxis at siimmit. Thorax very dark brown with 

 metallic green and blue sheen and rather dull ochreous markings ; broad 

 antelmmeral band to two-thirds of the height ; a ventral band and dorsal 

 round spot in front of humeral suture ; a sinuate line at metastigma ; 



