,,j,^.^ ^ ...:.lNpiA]^yPBAGONFLlF.S. ; 169 



Abdomen elighly dorso-ventrally dilated at the base, moderately con- 

 stricted at the 3rd segment, then moderately broad and depressed and 

 tapering gradually to the end. Bright scariet red. 



Wings relatively long ; trigone ia the hiudwing traversed; arc between 

 the 2nd and iJrd antenodalniervures ; 2 rows of cells betweien 5 and 5a; 

 Sthliieryure arising from the anal angle of the trigone in the hindwing ; 

 brown basal marking in the hiudwing extending as far as the 2nd antene- 

 dal and the arc. 



Membrane black. Stigma reddish brown, 3 mm. 



Female : a golden brown, the sides of thorax and the abdomen with an 

 olivaceous, or greenish tinge. '1 he sutures and mid-dorsal ridge finely out- 

 lined in black. The borders of the abdomen and the end segments, as well 

 as the dilatation of the 8th segment, didusely black. 



Genital organs of the male : lamina moderately depressed (SO*^), the 

 terminal part turning out somewhat, the outer surface not markedly 

 furnished with hairs and no special tufb of bristles. Tentaculse of uniform 

 height, short and blunt ; the two segments separated by a fairly broad 

 notch. Lobe much broadened in the length of the insect, scarcely arched. 



Genital organ of the female : border of the 8th segment foliately 

 broadened ; em I of 8th ventral plate projecting in the middle line as^ a 

 small/; obtu.^e angled vulvar scale with a snail, rcunded lole on either fcide 

 of it. Border of 9th segment rounded and the 9th ventral plate tumid, 

 not prolonged i 



Hab. India, N.-E. Burma and Sikkim. 



271 ' Orthetrum chrysis, Ris : Kruger. 



' '' ' hibelLa testaceu vAce clivysis, S'elys. 



Expanse 68 mm. Length 40 mm. 



Head ; eiyes brown above, paler at the sides and beneath ; vesicle and 

 occipiit olivaceus or pale brown; forehead dark red or ochreous ; face 

 and labrum pale ochreous or yellow. 



Pro thorax ; ochreous. 



Thorax : dark red or occasionally a dark, rich ochreous without any 

 niartings. Abdomen dark red or rich orange yellow. 



Legs' yellow or pale brown. 



Wings relatively short ; the basal spot in hindwing smaller than in 

 O. testqcea, extending oidy as far as the antenodal nervure, to the cubital 

 nervqi-ie, and for about 2 to 3 cells beyond the end of membrane; trigone 

 ia the hindwing traversed as a rule ; arc between the 2nd and 3rd 

 antenodal nervures ; 2 rows of cells between 5 and 5a ; 8th nervure 

 arisitig from the anal angle of the trigone in hindwing ; membrane black ; 

 antenodal nervures 15. 



Stigma blackish brown (3 mm.). The basal spot in the hindwing a 

 golden brown colour, 



Femalb : similar but a darker, ochreous nr olivaceous brown colour. 



Genital organs of the male ; lamina difl'ering very slightly from that of 

 O. testacea, but the outer surface furnished with a tuft of marketlly sloping, 

 stiff, black hairs ; the fissure separating the tentaculse rather deeper than 

 in testacea ; lobe moderate, arched. 



Genital organs of the female : very similar to testacea. 



Hab" India generally and Ceylon. 



The distinctions between this insect and testacea are not very striking 

 and' they may be but local varieties. The small size of the basal 

 marking in the hindwing and the tuft of hairs on the lamina are 

 the m6st' Striking points. Specimens taken in Poona are all a brillia,nt 

 ochreous yellow and are usually taken away from water in company with 

 parii'dla'. ' 



22 



