The. Odonafa or Dragonflies of South Africa. 337 



Abdomen ochreous or dull orange at sides ; dorsum of segments 

 1-5 bronzy browu, 6-9 black, 10 orange with a basal black spot. 



Pterostigma very light ochreous. Post-nodal eross-veius 8 in front 

 wings, 7 in bind wings. 



Immature females have alidominal segments 1-tj orange, with very 

 narrow black rings at the joints ; in one specimen the dark colour of 

 dorsum appears in narrow and incomplete lines. 



S,Ahd. 16-5, hdw. 10 mm. 9 , 19, 12. 



A badly damaged female from Bukama (29 . v . liUl, Dr. Beijuaert) 

 is probably of the same species (Mus. Tervueren). In Mr. E. B. 

 Williamson's collection there is a pair of Agriocnemis from Salisbury, 

 Mashoualand (ii . 1900, Marshall) which probalily belong to a different 

 species, but they are too much damaged for identification. The same 

 reservation is to be made for two males in the British Museum 

 collections, one labelled " Marshall collection 1910," without locality, 

 the other one " N.E. Rhodesia, Upper Luangwa River (27 . vii, 13 . viii, 

 1910, S. A. Neave)." • 



Probably several species of the genus exist in the fauual region 

 here discussed, but none is to be expected outside that part of the 

 region where climatic conditions are of the tropical type. 



II. SuBORDHH ANI80PTERA. 



Anisojitera are the " dragonflies " in restricted sense, the strongly 

 built, swiftly moving and generally larger members of the. Order. 

 American authors give, in contrast to them, the name " damsel-flies " 

 to the tiuy Zygoptera. 



The various divisions of Anisoptera are rather different in habits, 

 and some indications regarding them may better be reserved to the 

 single groups. The larger subfamilies are represented in the fauna 

 under discussion by a fair number of species, only the Cordulinae 

 being poor; three subfamilies, all lielonging to the family Aeschnidae 

 and each consisting of a very limited numlier of species, are absent 

 from the South African as well as from the Ethiopian fauna and not 

 likely to be found there (the oriental Chlorngonijdiiiiae, palaeo-nearctic 

 Cordulegiuitfrinae andthe Petah(riiiae, of which a few' species persist as 

 a kind of " living fossils " in Australia, Chili, North America and 

 Japan). 



C. Lateral lobes of labium of about equal size as iiieilinn lobe, two-jointed, the 

 terminal joint narrow ami pointed ('J'ext-lig. 2). Trianyles similar in 

 both pairs of wings, tlieir longer axis in the long a.\is of the wing ; their 

 proximal side distal to the arculus in both wings. 



