APPLE WOKMS. 



83 



89. Apple 'Wonn and its Larva. 



Sweet. The larvas (Fig. 89 a) enter the fruit usually where it 

 has been bored by the Apple worm (Carpocapsa), not uncom- 

 monly through the crescent-like puncture of the curculio, and 

 sometimes through the calyx, when it has not been troubled by 

 other insects. Many 

 of them arrive at ma- 

 turity in August, and 

 the fly soon appears, 

 successive genera- 

 tions of the maggots 

 following until cold 

 weather. I have fre- 

 quently found the 

 pupa) in the bottom 

 of barrels in a cellar in the winter, and the flies appear in the 

 spring. In the early apples, the larvae work about in every 

 direction. If there be several in an apple, they make it unfit 

 for use. Apples that appear perfectly sound when taken from 



the tree, 

 will some- 

 times, if 

 kept, be 

 all alive 

 with them 

 in a few 

 weeks." 

 Baron Os- 

 ten Sacken 

 informs 

 me that it 

 90. Parent of the Clieese Maggot. jj, ^ Di-qso- 



phila, "the species of which live in putrescent vegetable matter, 

 especially fruits." 



An allied fly is the parent of the clieese maggot. The fly 

 itself (Piophila casei, Fig. 90) is black, with metallic green 

 reflections, and the legs are dark and paler at the knee-joints, 

 the middle and hind pair of tarsi being dark honey yellow. 

 The Wine fly is also a Piophila, and lives the life of a perpetual 

 toper in old wine casks, and partially emptied beer, cider and 

 wine bottles, where, with its pupa-case (Fig. 91), it may be 

 found floating dead in its favorite beverage. 



