350 Annuls of the South Afrh-an Museum. 



specimens examined is iu sufficiently a;oocl coiiditiDU for a drawiui,'). 

 Appendages long and iiue, sharply pointed. 



S, Abd. 28 + 3, hdw. 24, jd. 3 mm. (Waterval) Transvaal ; 26+ < 

 3, 22, o (M'Fougosi), Zululand ; 27+ >3, 23, 3 (Harrar). $ , 32, 28, 

 < 3 (Kapiri) ; 32, 28, 35 (Waterval). 



CEENIGOMPHUS (Selys, 1892). 



A small genus, originally established for two Abyssinian species. 

 It does not seem to be separated by very important characters from 

 the group here united under Mesogomphus. In case of a fusion of the 

 two genera the name Crenigomjjhus would have priority. 



Crenigomphus Hartmanni (Forster, 1898). 



S. Afv. Mus. : 3^?, 5 ? , 1 (J ? , (w rnp., M'Fougosi, Zululand (iii. iv. 

 V, xi, xii . 1911, W. E. Jones). 



Colour light greenish yellow and dull ferruginous, the latter colour 

 deeper and better defined than iu 31. Hageiii and elpiduts, but not so 

 deep as in coijiuitus. 



(J . Labium whitish yellow. Labrum, face and frons very light 

 greenish yellow. On anterior ridge of frous a narrow l)rowuish stripe 

 not reaching quite to the lateral euds and behind 1-3 irregular rows 

 of black granulations. 



Occipital plate and upper surface of vertex duller yellowish than 

 frons. Anterior surface of vertex across the ocelli and base of frous 

 rather broadly lirowu. Free margin of occipital plate very slightly 

 convex, lined with short yellow hair ; ou the anterior surface a low 

 round convexity. On upj)er surface of vertex a transverse furrow 

 near the frouto-occipital suture, the surface ascending from the furrow 

 to a blunt anterior ridge, which, concave in the median line, projects 

 slightly over each lateral ocellus. Thoracic pattern, Plate IX, tig. 5. 

 Legs light yellow ; spines, claws and internal side of tarsi black, 

 merest trace of dark lines on tibiae and femora. 



Abdominal segments 1 and 2 very moderately dilated; 3- 6 rather' 

 robust, cylindrical; from middle of 7 gradually dilated to 10, strongly 

 in lateral, less in dorsoventral dimension ; tenth segment broadest in 

 both dimensions ; foliaceous dilatations of 8-9 moderate. Segments 

 1-7 rather pure yellow, a shade olivaceous ; 8-10 reddish yellow ; 

 markings almost black ; most of dorsum in segment 1 ; longitudinal 

 dorsal band on 2 divided by a very narrow mid-dorsal line ; 3-6 

 narrow line at anterior carina and round spot on the last third of 

 dorsum, fused to a terminal ring; lateral longitudinal stripe, uarrowly 



