1920,] 



F. F. Laidi.aw : Indian Dragonflies. 



157 



Text-fig. 5.— Thoracic colour-pat- 

 tern of Lestes sp. (J from Calcutta. 



along 



Prothorax grayish white below. 



Synthorax of the same colour, becoming milky white on the 

 sides and below. On either side 

 of the mid- dorsal carina lies a 

 row of three small black spots, 

 and on the side of the synthorax 

 between the humeral -and the 

 second lateral sutures there are 

 some four irregularly placed black 

 spots ; in addition a band of colour 

 darker than the ground colour is 

 found along the mid-dorsal carina, 

 and a similar band lies in front of 

 the humeral suture. 



Legs gray-white. The articulations, ciUa and a line 

 the posterior sides of the femurs black. 



Abdomen olive gray, passing on the hinder segments gradually, 

 to a warm dark cinnamon brown. Segment 2 has an anterior and 

 posterior pair of very small, black spots on either of the mid-dorsal 

 carina. 



Segments 2-6 have an apical narrow black ring, 3-6 have 

 also a pale basal ring incomplete dorsally, and a second pale ring, 

 likewise incomplete above, near the distal end of the segment. 

 Between this second ring and the black apical ring there lies a pair 

 of minute black spots, one on either side of the mid-dorsal carina. 



Segment 7 has a basal pale ring and deepens gradually in 

 colour to its apex, which has a narrow- black ring ; 8-10 are 

 progressively darker in colour, each has, about at its middle, on 

 either side of the dorsal carina, a jBne white spot, and each is 

 marked with a black apical ring. 



Anal appendages: Upper pair nearly as long as segments. 

 Basal fourth velvety black, the rest of their length milky white. 

 Gently and regularly curving inwards to meet at their apices. On 

 the inner side, at the end of the first third of their length, is a 

 blunt projection, and at the end of the second third is a sharply 

 pointed tooth directed backwards and inwards. The apex is 

 bluntly rounded. Lower pair more than half the length of upper 

 pair, meeting each other apically where they are upturned ; 

 rather spatulate. Each carries at its base on the inner side a some- 

 what tubercular projection extending for over one-third of its length. 



It is evident that the anal appendages of this species differ 

 strongly from other Indian species referred to the first Selysian 

 section of the genus. This supports my belief that the specimen 

 belong to a distinct sub-genus. 



13. Platylestes platystyla (Ramb.). 



Platylestes platysfyliis, Kirby, Cat. Odonafa, p. 164. 



See also remarks by de Selys in his paper "Odonates 

 de Birmanie." Ann. Mtis. Civ. Genova. X (XXX), 

 p. 499 (1890—91), 



