268 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Tol. XXVII. 



moderately robust spines. Female : hind femora with a row of gradually 

 lengthening spines in the distal third ; mid femora with a row of spines 

 which are very short in the proximal half and lengthening gradually in 

 the distal half. Tibial spines moderately long, very slim. Claw-hooks 

 long, slightly distal to the middle. 



Abdomen moderately short, the base very slightly tumid, slightly con- 

 stricted at the 3rd segment, then slim and cylindrical to the end, 4th 

 segment without a transverse ridge. 



Wings broad, reticvdation wide ; trigone in the forewing about 1 cell 

 distal to the line of the trigone in the hind ; arc between the ist and 

 2nd antenodal nervures ; sectors of the arc in the forewing separated, 



in the hind fused for a short distance ; 

 antenodal nervures 5-6, the last incom- 

 plete, the distance between the 1st and 

 2nd considerably greater than between 

 the others ; 8th nervure in the hindwing 

 at the anal angle of the trigone ; 1 cubital 

 nervure to all wings ; no supplementary 

 nervures to the bridge ; trigone in the 

 forewing free, broad, the costal side 

 rather more than half of the proximal, 

 the distal side strongly angulated at the 

 point where the nervure dividing the first 

 discoidal cells joins it ; relation of the 

 trigone to the hypertrigone rather more 

 than a right angle ; trigone in the hind- 

 wing free, slightly proximal to the arc, 

 its costal side bent back slightly at the 

 distal end ; 1 row of cells between 5 and 

 5fl ; 4th nervure with but a slight con- 

 vexity ; 8th nervure in the forewing 

 short and strongly curved ; 7a well 

 formed ; 2 rows of cells in the discoidal 

 field, the latter moderately dilated at 

 the termen ; loop extending about 1 

 the trigone, its apex very blunt, only 

 occasional divided cells at the outer angle and none at the trigone, 

 its midrib very straight ; a supplementary nervure springing from the 

 inner border of the loop, but the differentiation of cells in the anal 

 field by no means distinct. Stigma very small, indistinct. Membrane 

 relatively large. 



Sexual organs of the male without any external tentacuite. The female 

 with a very small, vulvar scale. 



77. Selysiothemis nigra, Ris, Ann. Soc. Ent. Belg., 41, p. 48 (1897)— 

 Seyles, ibid, p. 71 (1897)— Bartenef Ann. Mus. 

 Zool. Acad. Imp. St. Petersburg, 16, p. 411 (1912) 

 —Id., Mid Caucasus, Mus., 7, p. 108 (1912). 



Libellula nigra. Van der Lind, Monog., p. 16 (1825)— Selvs, Monog., 

 pp. 29, 55, 209 (1840)— Hagen, Syn. Lib.^Eur., p. 37 

 (1848)— Ramb. neur. p. 118 (1842)— Selys-Hagen 

 Revue, des Odonates, p. 65 (1850). 



Urothemis nigra, Selys, Comptes rendus Soc. Ent. Belg., 4 v. (sep.) 

 (1878)— Id., Ann. Soc. Ent. Belg., 31. p. 77 (1887) 

 — Kirby, Cat. p. 28 (1890). 



Trithemis nigra, Brauer, Zool, bot. Wien, 18, p. 736 (1868). 



67. — Male sexual organs 

 of Selysiothemis nigra. 



cell beyond the outer angle of 



