INDIAN DRAGONFLIES. 



265 



Genus — MAfiRODiPLAx, Brauer (1868). 



Macrodijylax, Brauer, Zool. bot. Wien., 18pp. 366, 737, (1868 — Kirby 

 Trans. Zool. Soc. Lond., 12,pp. 261, 262 (1889)— Karsch, Berlin, Ent. Zthr. 

 33, p. 3-56 (1890)— Selys, Ann. Soc. Ent. Belg., 41, p. 72 (1897). 



Fig. 65. — Wings of Macrodiplax cora (x about 2^). 



Head large, eyes contiguous for a long distance, this longer than the 

 depth of the occiput, forehead prominent and rounded, no marked fore- 

 border, suture broad and deep, vesicle prominent and slightly notched, 

 a distinct temporal projection at the side of the eyes. Prothorax with 

 a very small posterior lobe which is rather hidden beneath the head, flatly 

 arched and not fringed with hairs. 



Thorax robust, somewhat cubical as in Urothemis. Legs long and slim, 

 hind femora with a row of very small, evenly sized and moderately closely 

 set spines, with a longer one at the distal end, mid-femora with a row of 

 more widely spaced and gradually lengthening spines. Tibial spines 

 numerous, slim and long, claw-hooks robust, situated near the end of the 

 claws. Armature of the female very similar. 



Abdomen moderately short and robust, the base dilated ventro-dorsaily 

 and laterally, a slight constriction at the 3rd segment, then depressed, 

 fusiform and tapering towards the end. In the female the sides of the 

 abdomen are nearly parallel. No transverse ridges to the 4th segment. 



Sexual organs, see under species. 



Wings long and broad, reticulation fairly wide, trigone in the forewing 

 slightly distal to the line of the trigone in the hind, broad, its costal side 

 more than half as long as the proximal and its distal side somewhat 

 angulated outwards, relation of the trigone to the hypertrigone, a little 

 more than a right angle, subtrigone in the forewing 2 or 3 cells, trigone 

 in the hindwing at the arc or a little proximal, sectors of the arc in the 

 forewing separated, in the hind fused for a variable distance, arc between 

 the 1st and 2nd antenodal nervures, 6 to 7 antenodal nervures, the final com- 

 plete, 8th nervure in the hindwing at the anal angle of trigone, 4th ner- 

 vure not undulated, 1 cubital nervure to all wings, no supplementary 

 nervures to the bridge, all trigones and hypertrigones entire, 1 row of 

 cells between 5 and 5«, both 6a and 7a very highly developed, 8th 

 nervure in the forewing short and very strongly convex, the discoidal 

 JO 



