148 



HALF-HOURS IN THE GREEN LANES. 



microscopically in the shape of its scales. This 

 alone, therefore, is a good method of determining a 

 species. 



Not less beautiful objects, and requiring a much 

 lower optical power to perceive them, are the eggs 

 of butterflies and moths. Like the scales, they 

 differ with each species, both in form and arrange- 



Kig. 100. 



Fig. 101. 



Battledore Scale of 

 Polyommatus Alexis, 

 X 450. 



Egg of Pieris 



ment. Some of them are so common and yet so 

 attractive that they have obtained popular names. 

 Among these are the eggs of the Lackey moth, 

 which are found encircling twigs like the broad glass 

 bead rings often made by children. These eggs go 

 by the name of " fairy bracelets." With a one-inch 

 objective, the eggs of butterflies and moths stand 



