242 



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

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

 ment occurs that the Grrylli " 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 friend that they might be those of the Spec- 

 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 pupa?. 

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

 a very common and somewhat variable species, which attacks 

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

 Clisiocampa americana . 



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

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



HARRIS TO MISS MORRIS. 



CAMBRIDGE, Sept. 25, 1850. 



The 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 tAvigs of an Arbor 

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



