919 

 INDIAN DRAGONFLIES. 



BY 



Major F. C. Fraser, I.M.S. 



( With Text-figures J) 



(Continued frcm loage 744 of Volume XXVI.) 



Part VI. 



Genus — Trithemis, Brauer. 



Fig. 48. — Male sexual organs of ; a. Trithemis /estiva, b. Trithemis palli- 

 dinervis, c. Trithemis aurora, d. Trithemis Tcirlyi. 



Head proportionate in size ; eyes shortly contiguous ; forehead variable, 

 with or without a marked foreborder, usually without in the female ; suture 

 challow ; vesicle moderately high. 



Prothorax with a small posterior lobe, rather hidden beneath the head. 



Thorax moderately narrow. Legs long and slim: the hind femora with a row 

 of closely-set, smallish spines, gradually lengthening distally ; mid femora 

 with less numerous spines and some longer ones at the distal extremity. 

 Femora in the femald resembling the mid femora" of male. Tibial spines 

 numerous, fine and of medium length. Claw-hooks robust, springing from 

 the middle of claws. 



Abdomen of variable shape accordiiig to the species and also to the age 

 of individual specimens. Most often clavate and somewhat depressed or 

 else markedly fusiform. The base somewhat dilated dorso-ventrally and 

 usually some constriction at the 3rd segment. In the female, the shape is 

 more generally cylindrical. In festica and jmllidinerris the sides are more 

 or less parallel 



Wings relatively broad and long, especially in jmllidinervis. Hyaline or 

 parti-coloured ; reticulation close. Trigone in the forewing a little distal 

 to the trigone in the hind ; sectors of the arc with a long fusion ; arc 

 between the 1st and 2nd antenodal nervures ; antenodal nervures 8^ to 

 15i, the final incomplete , 8th nervure aris'ng from the anal angle of the 

 origone in the hindwing, occasionally slightly separated ; relation of trigone 



