72 FLIES TAKE SHELTER IN WET WEATHER. 



to remain, to watch its progress, which I did 

 more narrowly than I ever did before, and 

 found it subsisted on the bark of the tree, till it 

 gained strength sufficient to leave the web, 

 which several would do some days before the 

 rest, and then crawl away imperceptibly, 

 leaving the part where they had been, com- 

 pletely blistered and up in lumps. 



FURTHER DESCRIPTION OF THE LARGE FLY IN 

 ITS PERFECT STATE. 



Par. 83. Being thoroughly convinced it 

 was all tbe same insect, I looked about 

 among the apple trees, and saw several of these 

 flies, but they flew and darted about so quick 

 in the air, that it was a hard matter to knock 

 them down, and very few were so large as the 

 one before described : but later in the season, I 

 found many as large ; the male does not ap- 

 pear to be so large as the female, excepting 

 the head, which is larger. 



WHERE THE FLIES TAKE SHELTER IN WET 

 WEATHER 



p ar . 84. The part in this large quarter of 

 apple trees where I found the flies most, was 

 for about thirty yards where some Wych Elms 

 were in the hedge, and which produce large 



