1891.] (dRAGONFLIES) FROM CEYLON. 205 



oreadth, covering one or two cells ; some of the apical cells beyond 

 divided ; nodal sector broken through the greater part of its length, 

 rising from the vein descending from the nodus ; subnodal entire, 

 rising separately a little before the other; 21-26 postcubital 

 nervures ; sectors of the arculus rising from a short stalk ; sometimes 

 two basal postcostal nervures close together instead of one, in one or 

 other of the wings. 



Head bronzy black; rhinarium, labrum, and base of mandibles 

 white. Prothorax bronzy black above, shading into bronzy green 

 at the extremity; under surface testaceous, with an oblique white or 

 very pale green stripe on the sides ; the extremity beneath and on 

 the lower border of the same colour. Legs, except the tibiae and 

 tarsi, which are black, some spots between the wings above, and the 

 base and under surface of the abdomen rufous ; the greater part of 

 the three terminal segments of the abdomen with a pale mark above, 

 which is probably blue during life. Upper appendages more than 

 twice as long as the 10th segment, obtuse, and crossing inwards 

 and downwards, with a strong tooth on the inner side near the base. 

 Lower appendages about half as long, slender, the tips turned inwards 

 at a right angle. 



Belongs to the group of P. hilaris, Selys, but is apparently more 

 like P. maculata, Selys, in general appearance, to judge from the de- 

 scription of that species. 



Pundaloya (Aug. 1889). 



DisPARONEURA, Selys. 



10. DiSPARONEURA C^SIA. 



Alloneura ccesia, Selys, Bull. Acad. Belg. (2) x. p. 460 (I860). 

 Pundaloya (Aug. 1889). 



MiCRONYMPHA, Kirb. 



11. MiCRONYMPHA AURORA. 



Agrion (Ischnura) aurora, Brauer, Verb, zool.-bot. Ges. Wien, xv. 



p. 510(1865). 



Taken at Pundaloya. 



A widely-distributed East-Indian and Australian species. 



Archibasis, Kirb. 



12. Archibasis ceylonica, sp. n. (Plate XX. fig. 4.) 

 Exp. al. 50 millim. 



Head rufo-testaceous, paler beneath. Thorax tawny above, 

 inclining to greenish on the sides ; beneath pale testaceous, as well 

 as the legs ; the short spines, and a stripe on the femora above, 

 black. Abdomen with the first two segments, the sides and under 

 surface dull greenish brown ; second segment with a bronzy black 

 stripe on the median line, expanded at the lower extremity, where 

 there is a groove in the middle, but not quite reaching the end of 

 the segment, whicli is marked with a narrow black transverse stripe. 



