242 



eral remarks on tlie group contained in my book, p. 126, are 

 derived from European accounts, and in this the same state- 

 ment occurs tliat the Grylli " commit their eggs to the earth." 

 If the information given by my friend be correct, then my 

 suspicion becomes verified, and my statement must be changed. 

 I confess, however, to belonging to the sect of doubting philos- 

 ophers, and am not fully reconciled to the conclusion that the' 

 eggs in question are those of the great, green, tree Gryllus. I 

 suggested to my fi-iend that they might be those of the Si^ec- 

 trum femoratum, which Mr. Say, in his American Entomology, 

 has represented as inhabiting the rose bush. 



HARRIS TO MISS MORRIS. 



« 



Cambridge, Oct. 23, 1849. 



All the Notodontians (together with Limacodes) remain a 

 long time in their cocoons, or in earth, before turning to pupje. 

 The parasite of the Drop-worm is Ichneumon concitator Say, 

 a very common and somewhat variable species, whicli attacks 

 all sorts of larvoe. It is one of the most common parasites of 

 CUsiocampa americana. 



The parasites of the Saddle-worm appear to be identical with 

 my No. 366, Microgaster carpata Harr., Catal. 



HARRIS TO MISS MORRIS. 



Cambuidge, Sojit. 25, 1850. 



Tlie Drop-worms claim notice first. Last autumn, my good 

 friend. Dr. Henry Bond, sent to me from Philadelphia a box full 

 of their pods, containing eggs in great numbers. Early in the 

 spring, I tied twenty or more of them to the twigs of an Arbor 

 vitae tree in my little enclosure, and gave the remainder to Pro- 



