322 



FOREST ENTOMOLOGY. 



against the bark infested with Chionaspis, and sincerelj^ designated 

 the squashed eggs as " blood." Subsequent research with the micro- 

 scope has yielded many happy hours with what was originally 

 crushed in a careless and thoughtless manner. These eggs are of 

 a chocolate colour in autumn, just after oviposition, but become 





Fig. 303. — Life-history o/Chiona.spi.s salicis. 

 ;gg ; 2, lar\-a ; 3, dorsal surface of female scale— (a) first larval moult, (b) second 

 larval moult ; 4, under surface of female scale, showing dead female and eggs ; 

 5, fully developed female at period of fecundation ; 6, form of female scale at period 

 of egg-deposition ; 7, male scale or puparium ; 8, fully developed male ; 9, pygidium 

 or anal segment of female as seen under J-inch objective. 



lighter during the winter months. Now let us follow the develop- 

 ment of these eggs. Fig. 303 (1) represents a single egg. The larvfe 

 hatch out in Cheshire about the beginning of May, and by the middle 

 of that month the infested stems may be recognised at a considerable 

 distance, on account of the numerical strength of the larvse, imparting 

 quite a red colour to the stem. These larvae, (fig. 303 (2)) are at first 



