22 Mr. H. Campion 07i Bragonjlies fr 



'om 



4^. Ventral profile not much more convex then dorsal. 

 Snout equal to or a little shorter than diameter o£ eye, 

 which is 3 to 3^ in lengtlTof head. Maxillary tapering 

 posteriorly, extending to below posterior border of eye; 

 lower jaw moderately projecting, l^idges on head converge 

 a little posteriorly. 16-17 gill-ral^ers on lower part of 

 anterior arch. Ventral scutes 16 + 9-10. Dorsal 14-15 ; 

 origin equidistant from base of caudal and occiput. Anal 

 40-42 ; origin just in front of that of dorsal ; length of 

 base nearly 3 in length of body. Pectorals shorter than 

 head. Pelvics shorter than eye; inserted much nearer to 

 base of pectoral than origin of anal. A silvery lateral 

 band. 



West Indies. 



Five specimens, 80-90 mm. in total length ; types of the 

 species. 



Pellona bleekenana, Poey (' Repertorio,' ii. 1867, p. 242), 

 may not be distinct from Ch. tcBniatus. As described, it 

 seems to differ chiefly in having a single canine above and 

 two below on each side ; no teeth on tongue ; anal placed 

 behind dorsal. 



IL— Notes on Dragonflies from the Old World Islands of 

 San Thome^ Rodriguez^ Cocos-Keeling , and Loo Choo. By 

 Herbert Campion. 



Small collections of dragonflies from the tropical islands 

 of San Thome, Rodriguez, and Cocos-Keeling, and the sub- 

 tropical archipelago of Loo Choo, have recently come to my 

 notice, and, in view of the infrequency with which those 

 localities are referred to in the literature of the Odonata, 

 some remarks on the collections in question appear to be 

 called for. 



San Thome. 



Through the kindness of Dr. Guy A. K. Marshall, C.M.G., 

 1 have had the opportunity of examining a few Odonata 

 from this Portuguese West-African possession, submitted to 

 the Imperial Bureau of Entomology by Mr. A. F. de Seabra 

 in 1921 and Mr. H. J. Snell in 1922. Mr. Seabra sent 

 only a female of Ceriagrion glabrum, Burm., and a female of 

 Hemianax ephippiger, Burm. Mr. SnelPs sj)ecimcns, dated 



