348 Records of the Indian Museum. [Vol. VIII, 



5 cP- cf Dejoo, N. Lakhimpur, March ^ June, 19 lo {H. 

 Stevens). 



One of the specimens from Dejoo has an additional antenodal 

 nerve on the right fore-wing. It is rather remarkable to find this 

 abnormality, which is I believe very rare, in so small an insect 



Described from a specimen taken by Mr. Atkinson in Bengal. 



49. Argiocnemis nana, sp. nov. (PI. xvi, fig. 10.) 



I cf adult, Kachin Hills, Upper Burma. 

 Length of abdomen 18 mm. 

 ,, hind-wing 9 mm. 



Pterostigma gray, with a broad white border on its anterior 

 and outer margins. Six post-nodal nerves on the fore-wing. 



Head, lower hp white, the under surface of the eyes bright blue ; 

 upper lip blue, with a broad black line at its base, the rest of the 

 lower half of the anterior aspect of the head blue to the level of the 

 base of the frons, which has a black line. The rest of the upper 

 surface black, including the upper half of the eyes. Post-ocular 

 space blue. 



Prothorax black above, blue at the sides, the posterior margin 

 with a well-marked median lobe, slightly bifid. 



Thorax, upper surface black with a narrow blue antehumeral 

 stripe. Sides blue, with a small black spot at the base of the 

 second pair of wings, on the second lateral suture. 



Abdomen blue variegated with black ; i has a square black 

 mark occupying its dorsal surface ; 2 a longitudinal black dorsal 

 stripe, contracted posteriorly, and with a pair of oval blue en- 

 closures before its middle ; 3-7 each have a longitudinal dorsal 

 stripe which widens at its posterior end, then contracting again 

 immediately before its termination ; 8 has the black mark confined 

 to the dorsum for its first half, for the second half it expands on 

 to the sides of the segment; 9, 10 are almost entirely black save 

 for a small blue area on the lower parts of the sides of 9. 



Anal appendages, upper pair longer than lower pair, pale blue 

 above, black below. This pair is rather bluntly conical, a trifle 

 longer than segment 10. On their inner side they are convex and 

 slightly inclined to one another ; from their ventral margin depends 

 a large hook-like structure which is directed downwards, and at its 

 apex outwards and backwards. The lower pair are thick at the 

 base, directed upwards, bifurcated, with a crescentic posterior 

 margin. 



This species clearly belongs to the group which includes A . pyg- 

 maea, Ramb., and A. minima, de Selys 



It differs from these species in having the upper lip largel}^ of 

 a bright-blue colour, not metallic, in the colour of the pterostigma, 

 in the absence of orange or red colouring on the terminal segments 

 of the abdomen, and in the characters of the anal appendages. 



50. A. pygmaea (Ramb.) 



I & 26-iv-io [H. Stevens). 



