MAYFLIES, DUNS AND SPINNERS 245 



ciliae or short hairs on the surface and at the margins 



of the wings of the spinners 

 Male olive spinner. are by themselves sufficiently- 



remarkable to bring home to 

 the student the difference between the two stages 

 of subimago and imago. The male olive spinner 

 has a nearly black head and thorax and brown-red 

 turbinate eyes. The first six segments of the body 

 are pale green-grey and transparent, and the remain- 

 ing four segments at the tail end of the body are 

 a rich brown. The legs and setse are pale grey-olive. 

 No. 1 1 in the new set of patterns is the imitation of 

 this insect. 



The female spinner, apart from the difference of 



colour of body, is distinguished 



Female olive spinner, from the male by the absence 



of the turbinate eyes and of 

 the abdominal forceps. The fisherman will notice 

 that I have given two patterns of this fly, No. 12 olive 

 spinner female and No. 13 olive (red) spinner female. 

 The former of these is an imitation of the spinner 

 when depositing its eggs, and has a golden bronze- 

 green body with some of the segments on the ventral 

 side at the tail end of primrose-yellow. No. 13 is an 

 imitation of a female olive spinner after depositing its 

 eggs, and being what fishermen often call spent or 

 burnt, and its body is a dark dead-leaf colour. I have 

 added the word (red) to the name of this fly to dis- 

 tinguish it from the olive-bodied spinner, and also be- 

 cause, to my mind, this insect is the prototype of the 



