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 tlie 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 Spee- 

 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 soi'ts of larvae. It is one of the most common parasites of 

 Clisiocampa americayia. 



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

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



HARRIS TO MISS MORRIS. 



Cambridge, Sejit 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 twigs of an Arbor 

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



