124 



Insect Pests. 



LlFE-HlSTORY AND HABITS. 



The female sawfly is reddish-yellow with a black patch on the 

 head, and another on the thorax : the dorsum of the abdomen black 

 the head and mid division of the thorax minutely punctured ; the 

 reddish-yellow antenna? are dusky in the middle. The legs yellowish- 

 red ; wings transparent, somewhat iridescent with brown rims and 

 dark stigma, except at its end nearest the apex of the wing, where it- 

 is yellow. The female is from \ to nearly -A- inch long, the male very 

 slightly smaller. 



The adult appears in spring about the time the apple blossom is- 



[/'. Kdenden. 



FIG. 99. APPLE SHOWING SCAK FoRMEU BY APPLE SAWFLY ON YOUNG FRUIT, 

 WHICH THE MAGGOT FAILED TO ENTER.. 



bursting. The date varies from the end of April until the middle of 

 May. 



The females may be easily taken on bright days sitting on the 

 blossom, where they lay their eggs. The ova are laid down below 

 the calyx, seldom more than one egg to each blossom, but several 

 larvse have been found in one fruitlet. It appears that they lay 

 their ova between 9 and 2 o'clock, and then on bright days only. 



The egg stage varies in length, it may take eight days or it may 

 be two weeks in incubating. 



