92 ON THE DRAGONFLIES OF THE " SKEAT EXPEDITION." [Feb. 4, 



Description of a new Species of the Genus Lestes. 



Lestes ridleyi, sp. n. 



S . Length of abdomen (without appendages) 48 mm., of hmd 

 wing 31 mm., pterostigma 2*75 to 3 mm. 



General colour dull bronze-green. Wings hyaline, iridescent, 

 slightly tinged with brown at the tip. Two supplementary 

 sectors between the sub nodal and median sector, 18-19 post- 

 nodals. The nodal sector begins in the seventh cell after the 

 nodus in the fore wings, and in the sixth in the hind wings. 

 Reticulation and pterostigma black. 



Head. Lower lip dull yellowish brown, upper lip brown, rest of 

 the upper part of the head bronze- coloured. 



Prothorax dull brown, with a small bronze transverse mark 

 along its posterior margin, which is not indented. 



Thorax. Upper surface dark bronze-green, with an obscure 

 paler line following the humeral suture. Sides and lower surface 

 yellowish brown. 



Abdomen. First segment yellowish brown. The segments 2-7 

 have a roughened dorsal surface, which is brown-green with a 

 fine yellowish -green basal ring ; ventral surface bluish green, the 

 bronze extends laterally ; segments 8-10 smooth, bluish, pruinose. 

 Anal appendages lost, but, if I remember rightly, these were also 

 of a bluish colour. 



The male was taken in the same locality as the specimen of 

 Fericnemis, at the foot of Gunong Inas. There is stated to be 

 a female belonging to the same species, which I have not ex- 

 amined, in the British Museum collection, taken by Mr. Ridley 

 in Singapore. 



L. ridleyi is closely allied to L. orientalis Hagen, from Ceylon, 

 and L. udeana Krliger, from Sumatra. It is sufficiently distin- 

 guished from both by its size, being intermediate in this respect. 



EXPLANATION OF THE PLATES. 



Plate V. 



Fig. 1. Neurocena ida $ , p. 72. 



2. Onychotliemis testacea $, p. 75. 



3. Tetrathemis ])ulchra $ ,^.1\. 



4. Idionyx dohrni ^ , p. 78. 



5. Gomphus consohrinus $ , p. 80. 



6. Tlcho modesta $ , p. 84. 



Plate VI. 



Fig. 1. GompMdia peraJcensis $ , p. 81. 



2. End of abdomen of ditto. 



3. Sieboldiits grandis $ , p. 82. 

 3 a. End of abdomen of ditto. 



4. Side view of thorax of ditto (X IJ). 



5. Climacohasis lugens, fore wing, p. 85. 



6. Rhinocypha inas S, p. 88. 



■:7. Micromerus affinis S (X 1^), p. 90. 



