Cordulai. 1 43 



vei'}" pale yellowish ting^c ; base of hind-wings saffron, 

 and the base of the fore-wings to a smaller degree ; 

 anal angle of hind-wings bluntly pointed. Ptcrostigiiia 

 2'5nim., rather narrow, black. Accessory iitciiibi-anc rather 

 \\ide, dark, but shading off to white at the base. 

 Abdomen swollen at first and second segments, con- 

 stricted at third, gradual!}- swelling to the eighth, and 

 then contracting a little again ; bronze-green, generall}' 

 with a copper}' tinge in the posterior half; suture between 

 second and third segments yellow ; under side of second 

 segment yellow. Anal appci/dni^cs blackish-bronze, as 

 long as last two segments ; upper, cylindrical, blunt, 

 slightl}- di\ergent ; lower one as long as the upper, 

 deepl}- bifid, j^arts divergent and pointed, and with 

 an external lateral projection towards the tip (Fig. 29). 



Female Imago. 



Closel}' resembling the male in general. Chestnut 

 tint to upper surface of e}-es (De Selys). Wings slightl}- 

 tinged with saffron ; saffron suffusion at base of wings 

 more developed ; anal angle of hind-wings rounded. 

 Abdomen stouter, more uniform after third segment. 

 Ancd (rppoidages as long as ninth and tenth segments, 

 somewhat spindle-shaped. Vuhuxr scale not prominent, 

 deepl}- bifid, two [jarts bluntl}- triangular, yellowish. 



Immature Colouring. 



Pterostigma }-ellow, then brown. In a ver}- immature 

 male the aceessory membrane was white, and the saffron 

 suffusion near it ver}- pale. The deep saffron tint of 

 some females is perhajxs due to immaturit}-, and ma}- 

 disappear t(^ a great extent later. 



