278 On Odonata from Ceylon. 



base of mandibles ; mentum black, sides yello\\' ; occiput 

 black, occipital triangle and two spots behind each eye 

 yellow ; a yellow transverse band on back of collar ; thorax 

 and abdomen black, thorax with a conspicuous median line ; 

 pleura greenish bronzy, with three rather narrow oblique 

 yellow stripes, the first shortest and followed below by' a 

 curved yellow stripe above the middle coxae; interal.iry 

 spaces spotted with yellow ; abdomen very slightly inflated at 

 base, with no longitudinal line above, but with a yellow spot 

 in front of the second segment, the sutures from the second to 

 the fifth segments and the carina of tlie third segment narrowly 

 yellow; a row of large lateral spots, divided by the carina3, 

 Irom the third to the seventh segments, a small one below 

 tiie carina on the eighth, and an additional spot, bisected hy 

 a dark line, on each side of the median carina on segments 

 6 and 7. Legs black; front femora denticulated beneath, 

 and with 1 long spine towards the extremity on the inner 

 side ; tibia? setose beneath, with 5 long spines diminishing in 

 length on the outer side, and 2 or 3 shorter ones on the inner ; 

 rnitldle and hind femora with rows of spines, increasing in 

 lengtii towards the extremity and longest on the hind 

 femora ; middle tibite with 4 and hind tibi^ with 5 pairs of 

 long oblique spines, not quite symmetrical. Claws large, 

 curved, not toothed or bifid. 



Wings yellowish hyaline, sliglitly smoky at the tips, 

 iieuration black ; pterostigma very dark reddish brown ; 

 front wings with 1(3 or 17 anteno-lal cross-nervuies, the last 

 not continuous, and 10-11 postnodal cross-nervures ; nodal 

 sector much waved, one row of cells between the nodal and 

 subnodal sectors, increasing towards the margin ; sectors of 

 the arculus rising at two thirds of its length ; one cross- 

 nervure in the lower basal cell j triangle traversed sliglitly 

 above the middle, placed beyond the level of that of the 

 hind wings, regular, and followed by 3 rows of post- 

 triangular cells ; subtriangular space consisting of 3 cells. 

 Membranule of moderate size, grey, as also on the hind wings. 



Hind wings with 10 antenodal and 11-12 ])ostnodal cross- 

 nervures; triangle open (the base placed nearer the base of 

 the wing than the arculus), followed by one row of 3 colls and 

 then by rows of 2 or 3 increasing; sectors of the triangle 

 rising in a point at its lower angle. 



Hab. Tonkin {Fruhstorjer). 



A single female specimen of this handsome species. 



