250 THE DRY-FLY MAN'S HANDBOOK 



duns and spinners treated here. The female sherry 



spinner in some way expresses 

 Sherry spinner. her eggs and rolls them up into 



a small ball, carrying this ball 

 against the ventral side of her body on the penultimate 

 segment of the abdomen. These eggs, blue-green in 

 colour, are enveloped in a sac in some mucous fluid, 

 and when deposited in the water this sac expands, and 

 the eggs soon lose their striking colouration and 

 become a dull brown. The female sherry spinner is 

 seen at Plate XXV, and the drawing to a larger magnifi- 

 cation of the lower side of the hinder ends of the body 

 reveals the presence of lobes which, with the assistance 

 of the setae turned under against the body, serve to 

 keep the little ball of eggs in position when the insect 

 is in flight. The eggs are deposited by the female 

 turning the setae outwards when close to the surface, 

 and allowing the egg mass to fall into the water. 

 Like the eggs of all water-bred insects they are 

 specifically heavy and sink to the bottom. The 

 patterns of the two sexes of sherry spinner in the 

 new series are Nos. 24 and 25. 



The march brown {Bcdyurus venosus) is shown in 



outline at Fig. 34, and the 

 March brown, nymph at Fig. 39, as the type 



of the flat nymphs. I have 

 never secured a single specimen of the fly on the Test 

 or Itchen, but it must be present, because on both 

 these rivers I have quite exceptionally found nymphs, 

 and they were in some cases verified by the Rev. 



