352 



An.nals of the South African Museiim. 



median ocellus, being about the breadth of the ocellus, aud ends 

 posteriorly in a point near the transverse furrow (evidently in 

 copulation the point of the inferior appendage of male fits exactly 

 into this groove). Dark markings of abdomen considerably reduced; 

 terminal spots shorter, pointed anteriorly ; lateral stripes very narrow, 

 rather widely distant from the margins. Segments 8-9 but little 



FIG. 56. Crenigomphus hartmanni, f . M'Fongosi. Terminal segments, 



ventral view. 



different from male, foliaceous dilatations only slightly narrower. 

 Tenth segment narrow and short ; appendages slightly longer, fine, 

 sharply pointed. Groove on ventral plate of segment 9 small ; 

 vulvar scale small, triangular, excised (Text-fig. 56). Wings as in 

 male. 



c? , Abd. 30 + 2-5, l,Jv. 28, pt. 4 mm. ? , 35, 30, 4'5. 



ONYCHOGOMPHUS (Selys, 1854). 



A genus containing numerous palaearctic and oriental species. 

 Of the African species formerly attributed to Onychogomphus, the 

 majority are not quite homogeneous and will eventually pass to 

 MesogompTius. 



ONYCHOGOMPHUS SUPINUS (Selys, 1854). 



S. Afr. Mus. : 1 <$ , Barberton, Transvaal (xi . 1918) ; 1 $ , Kranzkop 

 (21 . xii . 1908) ; 1 9 ,M'Fougosi, Zululaud (xi . 1911, W. E. Jones). 



Light yellow aud deep black. 



<$ . Labium light yellow, margin of median lobe and tips of lateral 

 lobes blackish. Labrum, face and frons yellow; base of labrum 

 narrowlv black ; a black transverse line on the median part of the 

 fronto-nasal suture, which line crosses laterally over the postclypeus 

 almost to its lateral inferior angles. Basal half of dorsal surface of 

 frous black ; two lateral irregular groups of black granulations near 

 the anterior ridge. Vertex blackish, except the ridge over the ocelli, 

 which is yellow. Occipital plate yellowy narrowly lined with black at 

 the free margin ; free margin almost straight, with long black hair. 



