Syuipctruvi. 89 



of the first segment, and the base of the second, black ; 

 a pair of tiny, posterior, dorsal black spots on segments 

 3 to 7 ; a mid-dorsal black streak along segments 8 and 9 ; 

 each lateral ridge of abdomen black. Anal appendages 

 russet, the superiors cylindrical, pointed, longer than the 

 ninth segment ; lower one shorter, triangular, blunt, 

 black-tipped. 



Female Imago. 



In the female the crimson colouring is replaced by 

 yellowish-olive, except as regards the pterostigma, which 

 is deep ruddy, and the eyes which are reddish-brown 

 abo\e. Abdomen compressed be\'ond the second segment, 

 and not dilated at all posteriorly ; powdered with white 

 below. Anal appendages Ywssci, about as long as the ninth 

 segment. J-^ulvar seale not prominent. Pterostigma a 

 trifle longer than in male. According to De Selys, in 

 very old specimens the dorsal surface of the abdomen 

 is more or less red. Base of fore-legs }'ellowish. 



Immature Colouring-. 



Absence of crimson in both sexes is, generally speak- 

 ing, the characteristic of the immature state, its place 

 being taken b\' a \-ellow-brown tint. The saffron colour 

 is often more extended on the wings. The pterostigma 

 is light grey or blackish. De Sel}\s mentions that 

 the nervures of the wings are black, and that the 

 interior of the two fore femora is \'ellow. 



Variation. 



This species does not seem subject to much varia- 

 tion, if we leave out of consideration the colour of the 



