igiy-] F- F- IvAiDi.AW : Indian Dragonflies. 331 



B. Legs largely black. 



i. Abdomen slender, 35 mm. or more in length. 



a. Thorax black (in adult male) ... C. nwrfoni, sp. n. 



b. Thorax largely brilliant chrome yellow. 



C. chromotlwrax, Selys. 

 ii. Abdomen stout, about 30 mm. long or less. 



a. Abdomen of young males yellow marked with black, of adult 



males brownish-black or entirely black. 



C. piilveyitlans, Selys. 



b. Abdomen dark carmine-red marked with black. 



I. Upper lip red-brown, lower anal appendages longer than 

 upper pair ... ... ... C. miniata, Selys. 



" 2. Upper lip black, lower anal appendages not longer than 

 upper pair ... ... C. erytlwonielas, Selys. 



$ A. Legs yellow. 



Dorsum of abdomen bronze-green (in adult). C. exiinui, Selys. 



B. Legs largely black. 



i. Abdomen }ellow with black marks. 



a. Terminal segments black (or whole abdomen black in fully 

 adult specimens ... C. pulveriilans, Selys. 



h. Terminal segments marked with yellow. 



C. clii'oiiioiJiorax, Selys. 

 ii. Abdomen crimson with black marks. 



a. Upper lip black ... ... C. eiyfhroinelas, Selys. 



b. L^pper lip red-brown ... .. C. miniata, Selj's. 



Genus Coeliccia, Kirby. 



I regret to find that I have caused considerable confusion in 

 the synonymy of this genus. It is one where adequate material is 

 very necessary, as the species are decidedly difficult. I take the 

 opportunity here of correcting my previous mistakes. 



Species of the genus will probably prove numerous ; from 

 Borneo I have seen several undescribed forms. The structure of 

 the anal appendages of the male and of the prothorax of the female 

 are of especial importance in discriminating the species. 



The genus has been divided by Selys with two sections depen- 

 dent on the position of the sectors M3, RS, with regard to the 

 subnodal cross vein. 



It is possible that some use may be made of the thoracic 

 colour pattern in grouping the species according as to whether : — 



{a) Males and females both have an ' antehumeral' band 

 (as in C. memhranipes). 



[b) Males have round or oval spots on either side of the 



thoracic carina, females with antehumeral band {e.g. 

 C. renifera, Selys). 



(c) Both sexes have round or oval spots on either side of 



the thoracic carina [e g. C. fiavicauda, Ris). 



Presumably those species falling under (c) are the most 

 specialized, at any rate as regards colour. 



The thoracic colour pattern is certainly very interesting; 

 species of the genus have apparently evolved, within the limits of 

 the genus, an arrangement widel}^ different from their allies. But 



