Tli? Oilonata or Dragonflies of South Africa. 



Vertex joining the occipital plate in an obtuse angle, almost plain 

 and hori/ontal, forming an obtuse ridge above the ocelli. Thoracic 

 pattern Plate IX, fig. b'. Legs yellow, femora with two black lines, 

 iiit'Tnal side of tibiae and tarsi black. 



FIG. 57. Onychogomphus supinus, . Barberton. Terminal segments, 

 ventral and left side view. 



Abdominal segments 1-2 moderately dilated, 3-6 cylindrical, rather 

 robust, posterior half of 7 to 9 gradually dilated, 10 slightly narrower 

 than 9: lateral margin of 8-9 moderately foliaceous. Yellow, with 

 black markings on segment 2, broad dorsolateral bauds, and narrow 

 lines at anterior joint and transverse carina ; 3-7 lateral bauds, distant 

 from lateral margin by slightly less than their own breadth, narrowly 



FIG. 58. Onyehogov/vphfus supinus, <J . Barberton. 



segment, left side view. 



Genitals, second 



interrupted at anterior end, and dorsally dilated at transverse carina 

 and posterior third of each segment ; complete narrow black rings at 

 the end of each segment ; 8-9 ferruginous, yellowish at the sides, a 

 dorsal blackish mark on anterior half interrupted on 8 by a sinuate 

 yellow spot, on 9 by two yellow points; foliate dilatations black; 

 10 black on basal third, yellow posteriorly. 



Appendages (Text-fig. 57), superior yellow, inferior black. Genital 

 organs of second segment, Text-fig. 58, 



