1902.] DRAQOXFLIES OF THE " SKEAT EXPEDITION." 67 



Journ. Linn. Soc, Zool. xxiv. p. 551 ; Selys, Ann. Mus. Genov. 

 (2)x. p. 468(1891). 



A widely spread Oriental species ; common on the lower reaches 

 of the Kelantan River and in the town of Trengganu. 



Orocothemis servilia (Drury). 



Crocothemis servilia, Kirby, Cat. Odonata, p. 21 ; Selys, Ann. 

 Mus. Genov. (2) x. p. 468 (1891). 



Kwala Aring in August, in an opan space near forest. East 

 Indies and Australia. 



Brachydiplax MARIA Selys. 



Brachydiplax maria, Kirby, Cat. Odonata, p. 22. 



Kwala Aring. Bindings and Selangor [Ridley). Borneo. 



*Brachydtplax mel/E.ntops Selys, Ann. Mus. Genov. xxvii. 

 p. 457. 



Brachydiplax melanops, Kirby, Cat. Odonata, p. 22. 



A small species from Selangor taken by Mr. Ridley, and now 

 in the British Museum, probably belongs to the species indicated 

 by de Selys, agreeing with it in its small size. Abdomen 16"5 mm. 

 long ; hind wing 22*5. The thorax and first fore segments of 

 abdomen blue-pruinose. 6 prenodals and 5 postnodals on the 

 fore wing. Internal triangle free. 



Brachydiplax pruinosa, sp. n. 



Length of abdomen 18'5 mm. Length of hind wing 24 mm. 



c? . Head yellowish grey, margins of the upper and lower lips 

 black, frontal tubercle, and upper surfaces metallic blue. Eyes 

 brown. 



Prothorax and thorax coppery green dusted over with very 

 pale blue ' bloom.' Abdomen : first five segments grey, also coated 

 with ' bloom,' the rest black, second and third segments with a 

 transverse carina ; legs black ; pterostigma and venation black. 



Fore wings : 8 antenodals, 6 or 7 postnodals. Discoidal tri- 

 angle free, followed by two rows of cells. 



Hind wings : 7 antenodals, 6 or 7 (usually 7) postnodals. The 

 hind wings have a faint tint of yellow at their base. 



Two males from Kwala Aring taken in August. 



*MiCRODiPLAX delicatula Selys. 



Microdiplax delicatula, Kirby, Cat. Odonata, p. 22. 



Macrodiplax vittata Kirby. 



Urothemis vittata Kirby, Journ. Linn. Soc, Zool. xxiv. p. 552, 

 pi. 42. fig. 2. 



A male specimen from Kwala Aring. Mr. Kii'by tells me that 

 this species should be referred rather to the genvis Maerodipilax 



