BORNEAN DRAGONFLIES. 33 



a dark line in the subcostal space of the fore wing seems to be a 

 character dependent on the maturity or otherwise of the indi- 

 vidual. I have seen several examples from Baram and from 

 Saribas, and except in this particular their characters are constant. 

 The auricles are relatively a little smaller and less prominent than 

 in P. sitbnodcdis, and the space between R and M before the 

 nodus is occupied by opaque metallic-green colour in all the 

 specimens I have seen. 



14. Devadetta argyroides (Selys). 



Devadetta argyroides Kirby, Cat. Odon. p. 111. 



Tetraneura argyroides Max-tin, Mission Pavie (sep.), p. 17. 



Devadetta argyroides Laicllaw, Fascic. Malay. Zool. pt. 1, 

 p. 199. 



5 S 6 , 6 5 5 j taken during September. Two females are 

 noted as having been collected, one at 2800 ft., the other at 

 3000 ft. altitude. (Nos. 1, 2, 5, 6, 12, 19, 42, 46, 53, 66, 1914.) 



Rhinoneura, gen. nov. 



A genus belonging to the legion Libellago, and closely allied 

 to Rhinocypha, to which genus the general characters of the 

 venation indicate near relationship. The wings are long and 

 narrow, both pairs of equal length, pterostigmata large and 

 inflated. Abdomen long and fairly slender, surpassing the 

 wings considerably in length. Segments 3-7 (in the male) each 

 about four times as long as segment 2. Legs long and slender, 

 but not reaching to the end of segment 4 when ad pressed, 



15. Rhinoxeura villosipes, sp. n. (Text-figs. 4, 5 A.) 

 1 6 . 6.9.13 (No. 59, 1914). Kina Balu. 



Length of abdomen 35 mm., of hind wing 27 mm., of ptero- 

 stigma 2 - 5 mm.; breadth of hind wing 4*5 mm. 



The insect resembles in its proportions a Diphlebia, but is, of 

 course, smaller than the species of that genus. 



Wings (text-fig. 5 A) very narrow, transparent, with a very faint 

 yellow tinge, except for the extremity of the hind wing, which 

 becomes smoky brown at its apex from the level of the middle of 

 the pterostigma. The latter is large, brownish black, with its 

 costal and anal borders convex. Quadrilateral long and narrow, 

 in the fore wing divided by 3 cross-nerves, in the hind wing by 4.. 

 "Sectors of the arculus " separated at their origin. 13-14 

 antenodal costal nerves ; of these only two, viz. the first and third 

 are continuous with the nerves of the postcostal space, and the- 

 third lies at the level of the arculus, except in the right hind 

 wing, where an extra (?) non-continuous antenodal lies before the 



26-29 

 level of the arculus ; » " postnodals. The cells of the wings- 

 show none of the antero-posterior elongation characteristic of 

 certain species of Rhinocypha. The nodus is distinctly proximal 



Proc. Zool. Soc— 1915, No. III. 3 



