170 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI. 



28. Orthetrum pruinosum neglectum, Ris. 



Libellula neglecta, Rambur. 



Libella neglecta, Selys. 



Orthetrum neglecta, Kirby. Cat. p. 182 (189U). 



Morton, Trans, Ent. Soc, L(md. (1907), p. 305. ; 

 Libellula petalura, Brauer. 

 Libella petalur a, Brauer. 



Orthetrum petalura, Kirby, Cat. p. 39 (1890). 

 Libellula pruinona, Brauer. 



Orthetrum p7-uinosum,Kichy , Proc. Zool. S<>c. Land. (1886), p. 327. 

 Libella pruinosa clelia, Selys. 



Orthetrum pruinosum ceylanicum, Forster. 1903, p. 541. Ann. Mun. 

 Hung. 



Male : Expanse 72 mm. Length 45 mm. 

 Head ; eyes a deep, blackish blue above, slaty blue beneath ; occiput 

 vesicle and face a dark brown ; upper part of epistome and forehead a dull 

 metallic blue black. 



Prothorax : dark crimson overlaid with a thin blue frosting. 

 Thorax a rich, dark crimson overlaid with blue frosting which gives it 

 a rich violet tint, reminding one of the bloom on a damson. No markings. 

 Legs black. 



Wings long and broad, hyaline, often a little smoky at the apices ; 

 a dark amber-coloured patch in the basal area of the hindwing extending 

 as far as the 1st antenodal nervure and slightly beyond the cubital 

 uervure, over 1 or 2 cells of the loop and 2 to 3 cells beyond the end of tho 

 membrane. 



Stigma dark brown, almost black, 3 mm. ; membrane grey or black. 

 Trigone in the hindwing traversed ; 2 rows of cells between 5 and 5a ; 

 antenodal nervures 14 to 15 ; loop well formed, split cells at the trigone 

 and at the external angle ; 3 rows of cells in discoidal field. 



Abdomen markedly, dorso-ventrally dilated at the base, then moderately 

 broad, parallel-sized and markedly depressed. A rich crimson without any 

 markings and overlaid, especially the first 3 segments, with a thin bine 

 frosting which gives it a violet appearance. 

 Anal appendages: crimson, short, cylindrical. 



Genital organs ; lamina procumbent, only the apex turning out a little ; 

 inclination to the body axis about 30°; the outer surface furnished with long, 

 stiff black bristles. The inner segment of the tentaculse furnished with a 

 backwardly and somewhat outwardly directed hook and separated from 

 the external segment by a moderately deep, arched fissure. Lobe mode- 

 rately procumbent, rounded and arched. 



Female : Expanse 65 mm. Length 43 mm. 

 Head ; eyes warm brown above or occasionally a bottle green, slaty 

 blue beneath ; occiput olivaceous brown : vesicle, clypeus and labrum 

 olivaceous and glassy or diaphanous. 

 Prothorax brown. 



Thorax varies considerably in its colouring. The ground colour may 

 be a dull olivaceous brown with obsolete markings or it may be a golden, 

 brown with a greenish tinge. A broad, humeral, brown fascia bordered in 

 front and behind with black and the black border in front again bordered 

 with pale whitish green ; laterally ohvaceous brown or pale greenish 

 yellow with a median black streak. 



Legs olivaceous at the bases of f emoris, black beneath and at the distal 

 ends of femorse and the tibiso. 



Wings hyaline ; the apices faintly smoky. No basal markings to hmd-. 

 wings. Antenodal nervures 12. 



