BRITISH BUTTERFLIES 



that lost the fly ; next time get the net rather higher 

 than the thistle head and then strike downwards and 

 obliquely. 



Two collectors are busy among the butterflies in a 

 clover field. One has taken up a position and quietly 

 nets the right kinds as they come within range. The 

 other is rushing about hither and thither ; he does not 

 catch much, but he is taking plenty of exercise, and 

 incidentally doing some damage to the farmer's crop. 

 Again, in disturbing moths from their resting-places 

 in hedgerows, bushes, etc., one collector will slash 

 away right vigorously, but he seems anxious all the 

 time to push on as fast as he can. Insects leave 

 their retreat in response to his summons, but he 

 does not see them because he has passed the spot 

 when they emerge. Most of those moths will 

 return to cover and be secured by the collector who, 

 working methodically, has lagged behind his com- 

 panion. He gently taps the twigs here and there, 

 pokes his stick well into the hedge and stirs up the vege- 

 tation growing below, but he faces his work all the while 

 and very little escapes his wary eye. There is, too, this 

 further difference in the tactics of the two ; the col- 

 lector in a hurry boxes or kills outright everything he 

 succeeds in bagging, whereas the slower worker carefully 

 examines all his catches and at once liberates anything 

 he does not require. 



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