170 Mr. K. J. Morton on a 



evident relationship with Synlestes and Chlorolestes are 

 favourable to this association in spite of the absence of 

 supplementary sectors which have been regarded as 

 essential features of the Podagrion genera, Perilestes alone 

 being without them. 



Chorismagrion, no v. gen. 



Nodus about one-third of the distance between the base of the 

 wing and the distal side of the pterostigma. Basal side of the 

 quadrilateral absent in fore-wings as in Hemiphlebia. In hind- 

 wings, anterior side of the quadrilateral about | the length of the 

 posterior. 



A* separates from the inner margin distad to Cuq at above the 

 level of the costo-distal angle of the quadrilateral. The two Anq 

 placed at nearly equal distance from each other and from the base 

 of tlie wing and nodus respectively. Cuq placed nearer 1 Anq, 

 about ^ of the distance between 1 and 2 Anq. Cu^ arched at the 

 base. IVP from or very near the sub-nodus ; Rs at about 4 Pnq in 

 fore-wings, and 3 Pnq in hind-wings. M^ three cells further; M^*^ 

 about two cells still further (but rather unstable ranging from be- 

 tween one-tliird and one-half the distance between the nodus and 

 the proximal side of the pterostigma). Supplementary sectors 

 absent. 



Second joint of antennae rather more than twice the length of the 

 basal joint, the third longer than the first two together. 



Legs slender with rather long and fine spines ; claws long with a 

 well-defined tooth. Superior appendages forcipate. Ligula cleft 

 for about ^ of its length, the lobes rather narrowly separate, tapering 

 but blunt at the apex. 



Chorismagrion risi, n. sp. 



cJ. The whole of the head behind the antennae dull black ; vertex 

 frons nasus rhinarium and labrum brilliant metallic green with violet 

 reflections ; genae, base of the mandibles and basal joints of the 

 antennae yellowish; last joint of antennae black. Underside of 

 mouth parts mostly yellowish. 



Pronotum mostly orange broadly black at the sides. Mesepisterna 

 orange, slightly infuscated, dorsal carina black; mesepimera, 

 mesinfraepistorna, metepisterna and a small triangle of metepimera 

 near the bases of hind- wings blackish with traces of yellow near the 

 wing-bases. Underside of thorax and the legs, pale yellowish. 



Abdomen very dark green or blackish jirobably becoming bronzed, 

 first and second segments with the dorsum broadly yellowish, the 



