INDIAN DRAGONFLIES. 



491 



28. Brachydiplax sobrina, Ris, Kirby. 



Libellula sobrina, Rambur. 

 Diplax sobrina, Brauer. 

 Sympetnmi sobrina, Kirby. 



Fig. 31. — ^Wing neuration of B. sobrina. ( x 2J). 



Expanse, male, 50 mm., female 52 mm. 

 Length, male, 32 mm., female 28 mm. 



Head ; male ; eyes moderately contiguous, a pale violet brown above, pale 

 olivaceous at the sides and beneath ; occiput black with two yellow spots poste- 

 riorly ; front and upper part of epistome metallic bluish green, the lower part 

 of latter, the labrum and labium, pale green ; suture moderately shallow. 



Prothorax black frosted with blue. 



Thorax metallic green, frosted thickly with blue on the dorsum and the 

 humeral region, thinly at the sides where the metallic green shows through and 

 is marked by a post-humeral and a mid-lateral spot, yellow. The metepime- 

 ron broadly yellow crossed by a metallic green vertical stripe. Beneath frosted 

 thickly with blue. 



Abdomen frosted densely with bright blue, except the last 3 or 4 segments, 

 a subdorsal, yellow spot on the 7th segment. 



Anal appendages black. 



Legs black frosted with blue. 



Wings hyaline with a faint broAvliish suffusion near the membrane. Stigma 

 a light brown, heavily bordered with black. IMembrane white with a black 

 bordering. 3 cells in the subtrigone. 



Genital organs as shewn. Lainina large. 



Female ; head as for male. 



Prothorax black, a collar in front, 2 spots on the mid-dorsum and the free 

 margin of the lobe, lemon yellow. 



Thorax metallic green in front with yellow markings and a bright yellow 

 at the sides with metallic green markings. An irregular ?-shaped mark on 

 the upper, and a similar coloured stripe on the lower humeral region. A 

 Y-shaped mark and a broad stripe behind it, on the sides, metallic green. 



Legs black, the base of the anterior femorse yellow. 



Abdomen broad at the base and gradually tapering from thence to the end. 

 Strongly carinated, short. Black with yellow markings on all segments 



22 



