248 THE DRY-FLY MAN'S HANDBOOK 



blue colour of the wings is unmistakable, and will serve 

 to distinguish the iron-blue from the olive (which, too, 

 is much larger) and from the pale watery dun, which is 

 approximately the same size. 



The imagines of this species are both very striking 

 — the female is a small spinner 

 Iron-blue spinners. with brilliant glossy and trans- 



parent wings and body of a 

 dark maroon shade. The male is the jenny-spinner 

 of the old-fashioned fisherman, with a deep brown 

 thorax, the fore segments of the body a translucent 

 white, and the three hind segments a deep red-brown. 

 This insect is shown at Plate XXHI, and the tur- 

 binate eyes and abdominal forceps are depicted on 

 the same plate drawn to a greater magnification. In 

 the new set of patterns Nos. 20 and 2 1 are imitations 

 of the two sexes of the imago of this insect. 



The blue-winged olive (called by entomologists 



Ephemerella ignitd) is an in- 



Ephemerella ignita. sect found very plentifully in 



the majority of British streams. 

 In reference to some of the details of its life history 

 I am able to speak with more certainty than I can 

 of other genera and species of the Ephemeridee. 

 With the collaboration of Mr. T. P. Hawksley I col- 

 lected the eggs, and he hatched them in captivity, and 

 positively succeeded in raising one individual to the 

 subimagro stagre in a London areenhouse. The life 

 of this particular specimen from ^g'g to imago was 

 approximately one year. 



