INSECTS AND VERMES. 265 



viridata, concerning which, I find the fol- 

 lowing note in my Naturalist's Calendar 

 for the year 1785: 



About this time, and for a few days last 

 past, I observed the leaves of almost all the 

 oak-trees in Denn copse to be eaten and 

 destroyed, and, on examining more nar- 

 rowly, saw an infinite number of small 

 beautiful pale green moths flying about 

 the trees ; the leaves of which that were 

 not quite destroyed were curled up, and 

 withinside were the exuvice or remains of 

 the chrysalis, from whence I suppose the 

 moths had issued, and whose caterpillar 

 had eaten the leaves. Mark wick. 



EPHEMERA CAUDA BISETA. 

 MAY FLY. 



June 10, 1771. Myriads of May flies 

 appear for the first time on the Alresford 

 stream. The air was crowded with them, 

 and the surface of the water covered. Large 

 trouts sucked them in as they lay strug- 



