OX SALMONIA. 



the brown and white, which, in June and 

 July, are seized with avidity by the fish; and 

 being large flies, take large fish. 



ORN. Surely the May fly season is not 

 the only season for day fishing in this river? 



HAL. Certainly not. There are as many 

 fish to be taken perhaps in the Spring fish- 

 ing; but in this deep river they are seldom 

 in good season till the May fly has been on, 

 and a fortnight hence they will be still better 

 than even now. In September there may 

 be good fish taken here ; but the autumnal 

 flies are less plentiful in this river than the 

 spring flies. 



PHYS. Pray tell me what are the species 

 of fly which take in these two seasons. 



HAL. You know that trout spawn or 

 deposit their ova and seminal fluid in the 

 end of the autumn or beginning of winter, 

 from the middle of November till the begin- 

 ning of January, their maturity depending 

 upon the temperature of the season, their 

 quantity of food, &c. For some time (a 

 month or six weeks) before they are pre- 

 pared for the sexual function, or that of re- 



