mo NEW ISDIAN DRAG OX FLIES. 385 



both those scginonts iiiul on tho sides of the .3rd to (ith, the spots on the 

 hitter somewhat iniadrihitoral and foUowod posteriorly by a small streak 

 of tho same colour, two very large, oval, conspicuous spots on the dorsum of 

 the 7th segment. The 8th. 9th and 10th with no markings. * 



Anal appendaycK black, as long as tho 9th segment, cylindrical, pointed 

 and curving downwards. The inferior fused, narrow, triangular and curving 

 up to meet the superior. 



]\'in;/» long and narrow, the hind a little broader than the fore : apices a 

 little rounded : the node widely distal to the middle of wing : trigone in 

 forewing in line with that of the hind : arc between the 2nd and Srd ante- 

 no^jils : sectors of arc with very long stalks : ^th nervure (Cu. i) in the 

 forewing out of the posterior angle of trigone, in the hind widely separated : 

 14 to l(i antenodal nervures : the final antenodal complete; trigone 

 in hindwing widely distal to the arc, its costal side whole or near its distal 

 end, obtusely broken or bent : 4th nervure (nodal sector) flat in its 

 proximal part but bent rather sharply near the termen : only 1 row of 

 cells between .") and oa : trigone in the forewing very small, the costal side 

 very obtusely bent at its distal third : subtrigone and trigone in the 

 forewing entire : trigone in hindwing traversed : all hypetrigones traversed : 

 '2 cubital nervures in fore and hind-wings : only 1 row of cells in forewing : 

 discoidal field, nearlj'- up to the termen : 8th nervure nearly straight : 

 discoidal field nearly parallel or a little dilated at the end : loop very 

 indistinct, of only 4 cells and sharplj^ limited. Stigma medium sized, 

 nearly black, '2o mm. Membrane nearly obsolete, grey. 



Jl'inf/^ are hyaline with amber coloured spurs in the inferior costal space 

 (space between the subcostal and radius) and cubital space up to the 1st 

 cubital nervures. 



Genitals of nudi' : 2nd segment large and prominent, with large, foliate 

 tentacuUe (hamules). 



Femalp : Expanse 6o mm. Length 38 mm. 



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

 ings are similar but much more extensive, absorbing much of the ground 

 colour and bright lemon-j'^ellow instead of pale blue as in the male. Blue 

 marked specimens of the female are not uncommon. On the under surface 

 of the abdomen, running parallel with the pleural membrane, on either side, 

 is an additional blue or yellow stripe. 



Abdomen much stouter than that of the male, laterally compressed, 

 segments 7 to 10 dilated and the borders of the 8th and 9th with a foliate 

 expansion. 



Winys often showing considerable dift'erences : the costal side of trigone 

 in the forewing is not usually bent and that of the hind may or may not 

 be bent. The loop is much more developed, the cells numbering from 6 to 

 7. The node lies nearer the middle of costa than it does in the male. 



Genitals of female: border of 8th segment raised into a foliate-like 

 expansion or projection, its free border e.rched and deeply notched. 9th 

 ventral plate keeled. 



Anal append(i(/efi much smaller than those of the male, more remote, cylin- 

 drical, straight and about as long as the 10th abdominal segment. 



Habits. — This insect is not uncommon in the Nilgiris above Kalar 

 at about 2,000' in the months of June and July, but it is very local 

 and unless its haunts be happed upon, it may escape notice al- 

 together. The females are decidely more rare than the males and 

 on account of their striking black and yellow archaic colours, they 

 may be mistaken for Gomphina?. They have a very weak flight and 

 keep to the shade of heavy jungle lining mountain torrents. 



