CAMPION— ODONATA 437 



2. Diplacodes lefebvrei (Ramb.). 



(LibeUula lefebvrii Ramb., Ins. Ndvr., p. 112 (1842). 

 (Libellula tetra Ramb., op. cit., p. 119 (1842). 



Diplacodes lefebvrei Ris, Coll. Selys, Libell., fasc. xii. p. 465 (1911). 



Loc. Assumption Island: 1 $ (Dupont), 1910. 



Rambur's LibeUula lefebvrii, described from Egyptian females, and LibeUula tetra, 

 representing the Mauritian male, are considered by Dr Ris to be conspecific, and tetra 

 becomes a mere synonym of lefebvrii. The species is recorded from numerous localities in 

 Africa, and from Asia Minor, Arabia, Sokotra, Madagascar, Mauritius, and Reunion. 



3. Diplacodes trivialis (Ramb.). 



Libelhda trivialis Ramb., Ins. Nevr., p. 115 (1842). 



Diplacodes trivialis Ris, Coll. Selys, Libell., fasc. xii. p. 468 (1911). 



Loc. Seychelles. Mahe : 3 ^, 1 $ (Dupont). Silhouette: 9 ^, 6 $, plateau of Mare 

 aux Cochons, IX. 1908 ; 1 ?, Mont Pot-a-eau about 1500 feet, VIII. 1908. Praslin, 1905. 

 Coetivy, 1905. 



A common East- Indian species, known also from Suez and Queensland. 



4. Philonomon luminans (Karsch). 



Sympetrum luminans Karsch, Berl. Ent. Zeitschr., xxxviii. p. 22 (1893). 

 Philonomon luminans Ris, Coll. Selys, Libell., fasc. xiii. p. 697 (1911). 

 Loc. Assumption Island; 3 $ (Dupont), 1910. 



A widely-distributed species in Africa ; the British Museum possesses single specimens 

 from Zanzibar and Abyssinia. 



5. Pseudomacromia luctifera (Selys)*. 



Zygonyx{Vj luctifera Selys, Ann. and Mag. Nat. Hist. (4), iii. p. 273 (1869). 



Schizonyx luctifera Karsch, Berl. Ent. Zeitschr., xxxlii. p. 281 (1890). 



Loc. Seychelles. Mahe : 1 $, Morne Blanc, 800 feet, 1908 ; 1 ?, Long Island, VII. 

 1908; 2 ^(Dupont). Praslin, 1905. 



The following particulars are given in view of the variability of the species in respect 

 that the triangle and subtriangle in the forewing may be either free or traversed : — 

 In aU the specimens the anterior triangles are free. In one male the subtriangle In the 

 left forewing is 1-ceUed, becoming 2-celled, while in the right forewing it is 2-celled ; in 

 another male the subtriangle in both forewings is 2-celled, and in the remaining male and 

 in the female it is 3-celled. 



Various opinions have been held respecting the true systematic position of this 

 endemic species, but Dr F. Ris informs me that he has now come to the conclusion that 

 it should go into Pseudomacromia, an African genus already including two species from 

 Madagascar which he considers to be the nearest allies of the insect before us. The 

 British Museum possesses a pair {$ and ?) presented by Monsieur Ren^ Martin in 1 900. 



* See postscript, p. 446. 



