264 Annal:^ of the South African Museum. 



at base, and this colour exteiuling in a median line ; niaudililes and 

 genae yellow; auteclypeus yellow with a U-shaped black marking; 

 dorsum of head (postclypeus and front o-occipital region) mostly 

 yellowish with an olivaceous tinge ; the part between the eyes to the 

 base of antennae shows the male pattern ; only the lateral branches 

 of the medial spot are very nearly fused in front of the anterior 

 ocellus ; the part in front of the antennae, the basal joints of antennae 

 and I he postclypeus are largely olivaceous, with narrow black lines in 

 the depth of folds and suture. 



Thoracic pattern much as in male, the black colour somewhat 

 reduced, the light colours dorsally dull olivaceous, passing into light 

 greenish yellow on the sides. 



Feet blackish with grey pruinosity ; outer side of tibiae light 

 yellowish ; no dilatation of tibiae. 



Abdomen comparatively shorter than in male, less flattened, more 

 neai'ly cylindrical. Dorsuui dull olivaceous brown, with black 

 markings: Segments 1-3 as in J ; 4-7 a U-shaped marking and a 

 median dorsal line ; dorsum almost entirely black ; 1-8 a broad latero- 

 ventral longitudinal band, fused to the dorsal black colour on 9-10. 

 Ventral side : Sternites black, tergites olivaceous, bordered laterally 

 with black ; bluish pruinose in very adult specimens. Appendages 

 black, sti-aight, acute. 



Wings longer than in male, often tinged with light- yellow; 

 pterostigma mostly whitish, dark brown to black at both ends. 

 Venation (Plate VI, fig. 6). 



(J, Ahd. 21, hdw. 22, pi. 2 mm. ? , 19, 25, 26. 



PHAON (Sc'lys, 1853). 



The genus represents in South Africa the Sclysiau " Legion 

 Calopteryx," which division, like the " Legion Libellago," may 

 eventually rise to subfamily rank. There are two other closely allied 

 genera {Sapho and TJmma) in tropical Africa and the "Legion" is 

 represented in most of the great faunal regions. 



The earlier stages of Phaoii are unknown ; but it is to be expected 

 that the larva will not be essentially different from allied forms which 

 have been described, such as Calopteryx from Europe and North 

 America, Neurohasis and Vestalis from tropical Asia. 



Phaon iridipennis, Burmeister, 1839. 



S. Afr. Mus. : 7 c?, 5 ?, M'Fongosi, Zululand (ii, iii, v, x, xii, 

 1911, W. E. Jones) ; Kaapmuiden, Transvaal (xii . 1918, Tucker). 



