INDIA y DRA a OS FLIES. 



167' 



Genital organs y£ the male : lamina very depressed in its basal half, 30". 

 then turning abruptly outwards and at its extreme apex, curling forwards, 

 Apex fairly acute. Internal tentacular furnished with a bold spur which 

 i^ bent somewhat to one side at its apex, separated from the external ten- 

 taculse by a moderately, deep, arched fissure. Lobe high and strongly 

 iirched. 



Genital organs of the female : border of fctth segment, narrowly and 

 foliately dilated, the dilatation black and strongly toothed ; end of 8th 

 ventral plate notched slightly ; 9th ventral plate flatly arched. 



Anal appendages in both sexes black. 



Hab. Ceylon, Bengal, Burma, Tennasserim, Khasia Hills, and Nilgiris. 



Specimens from the Nilgiris vary widelj"- in the females. The measure- 

 ments of the two sexes are as follows : — Male, expanse 80 mm. Length 

 ;">u mm. Female, expanse 72 to 78 mm. length 45 to 48 mm. The abdomen of 

 the males is long, moderately narrow for its length, depressed and a bright, 

 cobalt blue, the hinder half of the 8th and the whole of the 9th and 10th 

 segments being black. The thorax in the female is a rich chocolate brown, 

 variably overlaid with a blue frosting which more or less obscures the 

 luarkings according to the age of the specimen. The dorsum is inclined 

 t> be bronzed and is distinctly paler. There is a pale, whitish yellow stripe 

 <m the tergum and 2 more or less bright, moderately narrow, whitish 

 yellow Btripes on the sides which become obsolete as traced upwards. The 

 nbdomen is stouter and shorter than that of the male, a dark olivaceous 

 tint, the borders and sub-dorsum diffusely black. Beneath, on each seg- 

 ment, are a pair of bright yellow lunules. The first 3 segments of the 

 abdomen are often thinly frosted with blue. 



The wings are not uncommonly, faintly smoky, especially at the apices. 



Stigma brown, bordered with black. .3'5 mm. 



Hab. Nilgirie 5,000' to 6,000'. 



25. OrthetrunD sabina, Kirby. 

 Libellula sabina Drury. 

 Lepthemis sabina, Brauer. 

 Libella sabina, Selys. 

 Orthetrum sabinum, Ris. 

 Liebellula gibba, Fabricius. 

 Orthetrwm diviaum. Kifbv, 



Lihelltda leptura, Burmeister. 

 Orthetrum leptura, Kirby. 

 Orthetrum lepturum, Needham. 

 Libellula ampullacea, Schneider 

 Lntthemix divistn, Selys. 



Fij 



■2H. 



-Wings of Orthetrum sabirut (x2). 



