INDIAN DRAGONFLIES. 



263 



between the 1st and 2nd nervures greater than the following, 1 cubital 

 nervure to all wings, no supplementary nervures to the bridge, all hy- 

 pertrigones entire, 4th nervure slightly undulated, 1 row of cells between 

 o and 5a, 8th nervure in the forewing very flat, 2 rows of cells in the 

 discoidal field, sides of latter parallel, the end of field a little contracted 

 or dilated, loop short and straight, its mid-rib nearly straight, divided cells 

 at the outer angle and trigone, cells in the anal area split into an outer 

 area of moderately large cells arranged in oblique rows and an inner area 

 of narrow, longish cells arranged in transverse rows, stigma and membrane 

 moderately large. 



Abdomen moderately short, broad and depressed, slightly constricted at 

 the 3rd segment, more or less fusiform in the male, the sides parallel sided 

 in the female, the 4th segment without ridges. 



Sexual organs: male: lamina depressed, small, external tentaculse 

 obsolete, internal tentaculte triangular, with a broad base and an almost 

 straight hook, which is less projecting than the lobe, lobe small, oval or 

 pointed. Female : border of the 8th abdominal segment not dilated, 8th 

 ventral plate longer than broad, projecting markedly and prolonged as a 

 tubular vulvar scale nearly to the end of the 9th ventral plate, split for the 

 greater part of its length, 9th ventral plate prolonged into a notched, 

 tongue-like process, 10th segment very small. 

 Only one species found within Indian limits. 



75. Urothemis signata signata, Ris, Coll. Zool. du. Selys, p. 1016, Fase. 



XVI (1913). 

 Libellula sancjuinea, Burm. Handbk. Ent. 2, p. 858 (1859) — Hagen, 

 Zool. bot. Wien, 8, p. 480 (1858)— Calvert, Trans. 

 Amer. Ent. Soc, 25, p. 87 (1898). 

 Urothemis sanf/uinea, Brauer, Zool. bot. Wien, 18, p. 737 (1868) — Kirby, 

 Cat. p. 23 (1890)— Id., Linn. Soc. Journ. 24-p. 

 562 (1893)— Selys. Ann. Soc. Ent. Belg. 41, p. 

 75 (1897)— Martin, Mission Pavie (p. 5 sep.) 

 (1904) — Forester Jahr. Nassau, 59, p. 316 tab. A, 

 fig. I. (1906)— Ris, Jena. Denkr., 13, p. 344 (1908). 

 Libellula signata, Ramb. Neur., p. 117 (1842). 



Fig. 64.— Male genital organs of— a. UrotJiemis signata signata, c. Macro- 

 diplax cora, d. Gamacinia gigantea, and Female organs of Urothemis 

 signata signata. 



