The Odonata or Dragonflies of Sovth Africa. 



333 



? . Very similar to male iu colour, the following being different : 

 dark lines at median thoracic suture not blackish, only reddish brown 

 with a small blackish nucleus. Blackish mid-dorsal band of segments 

 1-7 slightly narrower, narrowly extended on anterior half of 8; no 

 bluish shade on terminal segments. Vulvar spine strong ; valvae 

 slightly projecting beyond abdominal end. M.i and M|0 in male. 



S, Ahd. 25, lidw. Ih mm. 9 , 24, 16 to 26-5. 



Fig. 41. — Emdliujma suhtile, g. Kiipiri. 

 dorsal view 



Appemlnges, right side and 



ISCHNUEA (Charpentier, 1840). 



A cosmopolitan genus, somewhat peculiar in the geographical 

 distribution of its species. Some sj^ecies range over an exceedingly 

 wide area, but there is generally only a very small number of species 

 in one geographical region — mostly one or two ; certain other species 

 have a rather narrowly limited distribution, inhaliiting chiefly dry 

 regions (Western North America, Mediterranean, Europe and North 

 Africa, Ceutral Asia). The European I. elegans is one of the most 

 common Odonata of that continent, and remarkable for not being at 

 all particular to the (juality of water it inhabits, resisting evidently 

 a considerable amount of pollution. Similar resistance may account 

 for the wide distribution of other species. 



IscHNURA sENEQALENSis (Eambur, 1842). 

 S. Afr. Mus. : 19, King Williamstown, Cape Colony ; \ S < 

 Dunbrody, Blue Cliff (ii . 1912) ; 1 cJ, 1 9 , Newcastle, Natal (1893, 

 A.E.Hunt); 3 cJ.Lorenco Marques (18, 22 .xi. 1911); Otjituo, S.W. 

 Protectorate (i . 1920, Tucker). Brit.' Mus. : 4 (^ , 4 y. Deelfontein 

 (6. i. 1903, Col. Sloggett). Mus. Stockholm: 2 cJ, 3 9, Caffraria 



