254 JOURNAL, BOMBAY NATURAL HLST. SOCIETY, Vol. XXVIl. 



Sexual organs. See under species. 

 Only one species taken within Indian limits. 



70. Tholymis tiliarga.— Hagen, Stett. Ent. Ztg., 38, p. 220 (1867)— 

 Brauer, Zool. bot. Wien. 18, p. 712 (1868)— 

 Selys, Mitt. Mus. Dresden, 1878, p. 293.— Id. 

 Ann. Mus. Civ. Genov. 14, p. 305 (1879)— Kirby, 

 Trans. Zool. Soc. Lond. 12, p. 265 (1889)— Id. 

 Cat. p. I (1390)— Selys, Ann. Mus. Civ. Genov. 30, 

 p. 439 (1891)— Kirby, Linn. Soc. Journ., Zool. 24, 

 p. 547 (1893)— Martin, Mem. Zool. France, 

 9, p. 101 (1896)— Kirby, Ann. Mag. Nat. Hist. (7) 

 2, p. 230 (1898)— Martin, Mem. Soc. Zool. France, 

 19, p. 221 (1901)— Laidlaw, Proc. Zool. Soc. Lond. 

 1902, I, p. 65— Martin, Mission Pavie (p. 4. sep.) 

 (1904)— Kirby, Ann. Mag. Nat. Hist. (7) 15, p. 

 271 (1908). 

 Libellula bimaculata, Desjardins, Ann. Soc. Ent. France, 4, p. IV (1835). 

 Libelhda pallida, Palisot de Beauvais, Ins. Africa, America, p. 171, tab. 



2, fig. 2 (1805). 

 Tholymis pallida, Hagen, Stett. ent. Ztg. 28, p. 221 (1867)— Kirby, 



Cat. p. 1 (1890). 

 Libellulla tillarga, Fabr. Suppl. Ent. Syst., p. 285 (1798) — Burmeister, 

 Hand. Ent. 2, p. 852 (1839)— Rambur, p. 39, Neur, 

 (1842)— Calvert, Trans. Amer. Soc. Ent. 25, p. 69 

 (1898). 

 Pantala tillarga, Brauer, Zool. bot. "Wien. 14. p. 162 (1864). 

 Zyxomma tillarga, Brauer, Novara, p. 104 (1866) — Id. Zool. bot. Wien. 

 17, pp. 288, 505 (1867). 

 Expanse 70 mm. Length 43 mm. 



Male : head, eyes bright red or reddish brown above, lilaceous at the 

 sides and beneath, occiput brown or reddish, vesicle reddish, frons and 

 upper part of epistome reddish or bright ochreous, labrum ochreous, labium 

 yellow. 



Prothorax ochreous, no markings. 



Thorax golden yellow or with a bright reddish tinge on the dorsum, 

 paler at the sides. 



Abdomen bright red or bright ochreous with a reddish suffusion along 

 the dorsum. 



Wings hyaline, the bases tinged with light golden yellow. In the 

 hiudwing a large discal spot which is most intense at the node where it 

 abruptly ends in an almost straight border, running back for rather more 

 than half the diameter of the wing. Inwardly it gradually fades, until 

 lost just distal to the trigone. In the adult, external to this spot, a large, 

 diffuse, opalescent whitish spot develops, which viewed from above in the 

 gloaming, has a deceptively, phosphorescent appearance. 



Sexual organs. Lamina depressed, slightly arched, its border shallowly 

 notched and fringed with long yellow hairs, external tentacul^ obsolete 

 internal very compact, triangular, the hook short and thick and turning a 

 little outwards, lobe broad and oval. 



Anal appendages long and slim, of about the length of the two final 

 segments of abdomen. 



Female : eyes brown above, olivaceous at the sides and beneath, occiput 

 olivaceous brown, vesicle and face ochreous, paler below, labrum and 

 labium yellow. 



Prothorax and thorax, an olivaceous brown, somewhat greenish at the 

 sides, legs ochreous. 



Abdomen olivaceous brown. 



Wings hyaline, the basal marking very obscure. The discal marking 

 only just visible and without the opalescent outer marking. Stigma, as in 

 the male, reddish brown. 



Sexual organs : border of the 8th segment not dilated, 8th ventral 

 plate prolonged into a long, depressed, vulvar scale which at the end is 



