346 Records of the Indian MuseiDii. [Vor,. VIII, 



as opposed to 14-15 in C . olivaceuin ; in colour being much lighter 

 than C. olivaceum, and in having no colour pattern on the sides of 

 the thorax. 



I have also compared these specimens with a pair of insects 

 from N Queensland, received from Mr. Tillyard and named by 

 him C. glabrum, Burm. These are possibly identical with speci- 

 mens named C coromandelianum race erubescens by de Selys in his 

 paper on the " Odonata of Burma." 



Whether this be so or no Mr. Tillyard's specimens are I believe 

 unquestionably examples of C. glabrum, Burm., and are totally dis- 

 tinct in colouring and other particulars from either of the species in 

 the present collection. C. melanurum, de Selys, I am not acquaint- 

 ed with but it is suflficiently characterized by the black metallic 

 mark on the terminal segments of the abdomen. Lastly C. cerino- 

 Yubellum^ Brauer, of which species I have examined a number of 

 individuals from Borneo, is readily distinguished by its colouring 

 in both sexes, and by the long curved inferior anal appendages 

 of the male 



45 Argiocnemis obscura, sp. nov, (PI. xvi, fig. 6.) 



I cf Dejoo, N. Lakhimpur, base of hills, Upper Assam 

 5-iv-io {H . Stevens). 



Length of abdomen 30 mm. 

 ,, hind- wing 20 mm. 



The wings cease to be petiolated a little before the level of the 

 basal post-costal nerve. Arculus beyond the level of the second 

 antenodal nerve. Upper side of quadrilateral of fore-wing two- 

 third^ length of lower side, of hind- wing three quarters the length. 

 Pterostigma oblique, black, covering one cell. 



Head , upper lip greenish-blue ; genae and a line across the f rons 

 brownish-yellow, a pair of large post-ocular spots, nearly circular, 

 greenish-blue. The rest of the upper surface of the head black. 



Prothorax entirely black above with the exception of a small 

 yellow mark on the anterior margin. 



Thorax, black above, blue at the sides. There is a pair of 

 narrow greenish-blue antehumeral stripes, and also a black lateral 

 band at the second lateral suture. 



Abdomen, 1-7 bronze-black, I, 2, 3 blue at the sides and 

 below, 8, 9 yellowish- brown, with terminal black mark, 10 black. 

 Anal appendages, upper pair black, lower pair dark brown. 

 Legs, femurs dark brownish- black ; tihias lighter brown with 

 dark articulation. 



The upper pair of anal appendages are about as long as seg- 

 ment 10, seen in profile, they are finger-shaped, rounded at their 

 extremities. On the iimer surface they are concave, and each 

 carries very near its base a downwardly directed spur ; not seen 

 in profile. 



The lower pair are not so long; each carries at its apex three 

 small tooth-like projections, which lie at the angles of a triangle 

 with its apex upwards and to the outside. 



