330 MINUTES SEPT. 



1 24. glafs and the light, faw five or fix compleat 

 depofits in about twenty minutes : all exadtly 

 in the manner a bove defcribed. 



If the fly diflike the part of the leaf fhe has 

 begun to work upon, ihe withdraws her inftru- 

 ments, and feeks for a more commodious part. 

 Sometimes I have feen her begin at an angle, 

 where fhe had not room for a nidus ; at others, 

 the leaf being curled, fhe has found her mftru- 

 ments getting too near one fide of it ; and again, 

 have feen her begin fo near a former nidus that 

 her inftrument has broke into it: in either of 

 thefe cafes fhe defifted from going any farther. 



It is very obfervable, that fhe refufed entirely 

 the fmboth tender feedling-leaves, for thofe 

 which are rough and apparently more difficult 

 to work upon : but inflind:, no doubt, and not 

 eafe, directs her in the choice ; for the feedling- 

 leaves are of fhort duration, and would proba- 

 bly wither before the caterpillar became per- 

 Jetted. 



To-day, looking carefully to fee if I 

 eould perceive any progrefs made in an egg 

 which I faw depofited, lafl Sunday, in the 

 edge of the live turnep-leaf, and which I then 

 marked, I obferved, to my great fatisfaclion, 

 a young caterpillar feeding on the under- 



fide 



