742 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, T'oL XXVI. 



cells between 5 and 5a, 2 tows in the right forewing and some divided 

 cells only in the left. Antenodal nervures in the right forewing 15i, in 

 the left 16. The trigone in the hindwingis distinctly proximal to the arc. 



Sexual organs : lamina depressed at its base, distinctly beaked at its end ; 

 tentaculse small, the internal a short, black recurved hook, the external 

 sub-quadrate ; lobe broad and short, projecting. 



Female very similar to the male, but the markings better defined and 

 broader. A small, mid-dorsal spot of yellow is present on the 6th segment, 

 in addition to the large spot on the dorsum of the 7th. On the side of 

 the 4th segment, there is an obscure yellow line in partial prolongation of 

 the lateral, yellow spot. 



Sexual organs : border of the 8th abdominal segment not dilated, but 

 that of the 9th, markedly so. In one specimen which I possess, these 

 dilatations are distinctly seen grasping a mass of ova which the insect was 

 busily engaged in depositing in water at the time I captured it. 



Hab. Bengal, the Southern Hills of India, Ceylon, not below 3,000 feet. 

 The insect, in the Nilgiris, may be seen following the course of brooks on 

 the ghat roads, the female, however, keeping to more retired situations such 

 as the beds of precipitous mountain torrents. In Ceylon it is found in 

 similar situations. Eastwards it is found throughout Malaysia and Indo- 

 China, 



Genus — Onychothemis, Brauer. 



Fig. 46. a. Male sexual organs of Onychotheviis tonJcinensis ceylanica. 



b. Claws of same contrasted with " c " which shows the claws 

 of Zygonyx iris furnished with claw-hooks. 



Onychothemis, Brauer, 1868, Kirby, 1890, Karsch, 1890, Kirby, 1905. 

 Five species have been described, only one of which is found within 

 Indian limits. 



Head relatively small ; eyes shortly contiguous ; forehead prominent 

 and rounded, the foreborder not marked ; vesicle conical, high. 



Prothorax with a moderately large posterior lobe, projecting somewhat, 

 the border arched and bearing a small notch. 



