504 JOVRNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI. 



Genus — Rhodothemis. 



Fig. 37. —Wings, showing neuration of Rhodothemis rufa. 

 Rhodothemis, Ris, 1911. 

 Crocothemis, Van der Weele, Hagen. 

 Lihellula, Rambur, 1842. 

 Erythemis, Brauer. 

 Orthetrum, Kirby. 

 Head of medium size ; eyes just meeting ; occiput large ; forehead projecting 

 moderately ; in the male a shallow suture separating two flattened, triangular 

 areas which are not so distinctly demarcated in the female ; the suture almost 

 flush. Vesicle broad at the base but narrowing or pointed above where it 

 bifurcates into two tiny prominences. 



Prothorax lobe large and projecting, divided into two rounded lobes which 

 are fringed with long hairs. 



Thorax robust. Legs very slim. In the male the hind pair of femora with 

 about 8 very closely set and smallish spines, followed by 5 or 6 gradually length- 

 ening ones ; tibial spines numbering about 10, long and moderately stout. 

 Armature in the female less open but the basal spines of the femora are wider set 

 and less numerous. Claw-hooks small. 



Wings long and moderately broad ; reticulation fairly wide ; trigone in the 

 forewing a Uttle distal to the line of the trigone of the hindwing ; sectors of the 

 arc in both wings with a long fusion ; arc between the 1st and 2nd antenodal 

 nervures ; 8th nervure in the hindwing slightly separated from the anal angle 

 of the trigone ; antenodal nervures 10| to 12J, the final incomplete ; trigone in 

 the hindwing at the arc ; 1 cubital nervure to aU wings ; no supplementary 

 nervures to the bridge ; trigone in the forewing narrow, traversed ; trigone in 

 the hindwing and all hypertrigones free ; subtrigone in the forewing with 3 

 cells ; 4th nervure with a single flat curve ; 1 row of cells between 5 and 5a ; 

 8th nervure in the hindwing very strongly bent ; the discoidal field beginning 

 with 3 or 4 cells and then continued as 2 rows of cells nearly as far as the Une of 

 the proximal end of the bridge, strongly dilated at the termen ; anal field of 

 hindwing broad ; the loop large, its outer angle extending 3 cells distal of the 

 trigone, 4 rows of cells between it and the basal margin of wing. Membrane 

 large. Stigma moderately large. 



Abdomen at the base, dorso-ventrally dilated but only sUghtly so from side 

 to side. Broad and depressed and tapermg gradually to the end. 

 Sexual organs : see under species. 



