622 J0UR:SAL, BOMBAY natural BIST. SOCIETY, Vol. XXV. 



Thorax deep black with pale blue markings as follows : — A middorsal, fine 

 geminate line with a T-shaped mark above it ; an irregular, sinuovis, 

 humeral line and two broad, lateral fasciae. Overlaid or frosted with blue 

 beneath, the frosting sometimes extending to the sides. 



Occasionally the lateral, blue markings are greenish yellow and after 

 death, the blue always tends to fade to a yellow tint. 



Jjegs black with a bluish bloom on the under surfaces ; hind femone 

 with very small, numerous spines and a longer one at the extreme distal end. 



Abdomen slim, base very little dilated, 3rd to 6th segments triquetral on 

 cross section and very slender ; 7th to 9th a little dilated and together 

 forming a fusiform end to the abdomen ; black with blue markings as 

 follows : — a triangular blue spot on middorsum of 1st segment, and a linear 

 blue mark on the dorsum of 2nd, lateral blue spots on the sides of both of 

 these two segments and also on the sides of the 3rd to the 6th, the spots 

 on the latter somewhat quadrilateral and followed posteriorly by a small 

 streak of the same colour, lastly 2 very large, conspicuous blue spots on 

 the dorsum of 7th segment. The 8th to 10th segments with no markings. 



Anal appendages black. 



Female much larger and more stoutly built than the male. The mark- 

 ings similar to the male but much more extensive and although blue- 

 marked specimens are not uncommon, as a rule, the markings in the female 

 are a bright greenish yellow. Beneath the abdomen, running parallel 

 vfith. the borders of the pleural membrane, is an additional blue or yellowish 

 stripe. 



Wings of both sexes with an amber coloured spur in the inferior costal 

 space, reaching as far as 1st antenodal nervure and another in the cubital 

 space reaching as far as the 1st cubital nervure. 



Stigma nearly black, 2'5 mm. Membrane nearly obsolete, grey. Wings 

 hyaline. 



Hab. Beds of rocky mountain streams, where they keep to the edge of 

 the jungle. Foot hills of the Western Ghats, Nilgiris. 



Genus Agrionopteka. 



/ 8 9 



5 6 



Fijr. .'). — Wings of Agrionoptera insignis (X2J) showing' main neuration. 



,, <;.— Male secondary sexual organs (xlO) vie^ved from the side. 



