342 



ON BORNEAN DRAGONFLTES. 



Table of distrihution of genera found in Borneo. 



T. Genera confined to Borneo. 



LincESohna, Pseudagrionopfera, Ilatronoides, Hhinoneiira, Stenagrion, 



II. Genera specially characteristic of Malaya or confined there- 

 to (several of these occur in Indo-China). 



Tetracantliagyna , AmphitBSclina, Orchitheviis, Pornothemis, Pracliy- 

 gonia, Tyriohapta, Micromer2is^, Dysphcea, Devadatta, Podolestes, 

 Rhinagrion, Caeoneiira, Ampliicnemis, Pericnemis. 



III. Genera of Oriental distribution, with species confined to 

 Sondiac area. 



Orogomplms, Onycliothemis, Macromidia, Aziima, Idionyx, Jagoria, 

 GompJiidia, LepfogompJius, Macrogomplius, Microgomphus, Burma- 

 gomp]ius,IIeterogomplnis, Vestal is,Pseudophcea,Pliinocyplia, Coeliccia^ 

 Copera, Disparoneura. 



W. Genera common to Oriental and Australian Regions, with 

 species confined to Sondaic area. 



Agrionoptera, JSfe'urofhemis, BracJiydiplax, Lyriotliemis, Camacinia,. 

 Aciagrion, JDrepanosticta, 'Protosfictu . 



Y. Genera mainly Papuan or Australian, with species confined 

 to Sondaic area. 



Metaphya, Oda, Paphisma, Teinohasis. 



YI. Palteotropical (a) or Holotropical [b) genera, with species 

 confined to Sondiac area. 



(a) Ictinus, Tetrathemis, Phyofhemis, ^Plthriamanta, Pseudagrion^ 



Ceriagrion. 



(b) Gynacantlm. 



YII. Special cases : — 



H'ylceotliemis. Borneo. S. India, Cejlon. 

 Seliceschna. W. Africa, Malaya, Burma. 

 Macromia. Palseotropical, Palsearctic, Nearctic. 



Some negative characters showing contrast with Indo-Chinese 

 Province : — 



Absence of Cordidegastrina', relatively poor development of 

 genera of Ccdoj^terygince and of Brachytryon series 

 of JEschnincB. 



Relative scarcity of species of the following genera : — 

 Onychogomjjhus, Bestes^ Ischmira^ Agriocnemis. 



Absence of Davidius, Anisogomplius, Cyclogomphus, Gomj^hus, 

 Fseudothemis.! Sym2Mrum^ Palfoinleiira sexmacidata, 

 Bradinopygci , A nisopleAira. 



Genera not mentioned in the above table have no species 

 peculiar to the Sondiac area. 



Micromeriis has 13 species in Malaya ; one, M. I'meatus, widely spread in Indo- 

 Chinese province ; and one, M.Jinalis, in Ceylon. 



