156 Records of the Indian Museum. [Vol. XIX, 



angulated character of the same sector noted m his definition of 

 Sympycna where it is said ''le sous-nodal non anguleux ou a peine 

 ondule; " and of Lestes concerning which he makes the same 

 remark. 



Now an examination of the venation of the male specimen in 

 question shows that the sub-nodal section (Ms) can scarcely- be 

 sharply contrasted with that of species of Lestes in that respect. 

 Hence if the male be really conspecific with the t^-pe female the 

 strongest character distinguishing the genus is anulled ; the shape 

 of the pterostigma alone is I think scarcely to be reckoned a 

 generic character even though backed by certain sexual characters. 

 Hence I prefer to leave the question of the identity of this fine 

 specimen open, and hope that as it occurs in the neighbourhood of 

 Calcutta examples of both sexes may soon be available for exami- 

 nation. I am, however, of the opinion that it is really the male of 



Text-fig. 4. — X'enation of Lestes s^.{-=1 ^ Platylestes platysfyla (Ramb.) from 



Calcutta. 



Platy lestes platystyla. The following is a short account of the 

 specimen : — 



Wing petiolated to A c, which lies about midway between level 

 of Ax^ and /Ia;.^. Pterostigma short, its inner margin more oblique 

 than its outer, not twice as long as broad, a little inflated at 

 the middle of its length, black, its outer and inner margins paler ; 

 covering two cells, and with a well-marked brace vein. Quadrang- 

 les of fore and hinder-wings similar, inner side nearly equal in 

 length to upper. Ms becoming somewhat angled from the level of 

 a point midway between nodus and pterostigma (scarcely more so 

 than in other species of Lester;). 



Head : Upper lip and eyes olive-green ; the rest of the head 

 a light grayish-yellow, with three small black spots on the post- 

 clypeus, and black marks at the base of the antennae and imme- 

 diately in front of the anterior ocellus. 



