INJURIOUS INSECTS. 269 



1 conjectured, were infantile larva of the C. Salicis, until a fourth 

 occurred apparently feeding upon a dead and considerably shrivel- 

 led larva of the kind just described. Hence the inference arises, 

 that it may be some species of the Ichneumonidaj, that kills and 

 subsists upon the Cecidomyia's destroyer. 



A day since, on opening a withered and but half-grown gall, 

 like «ome passed by before without examination, I discovered with- 

 in its cavity, what appeared to be a dead and distorted larva of the 

 C. Salicis, and as such, laid it beside other fragments to be cast 

 into the fire. But happening to pass a magnifier over this, after- 

 wards, it was shown to be a cluster of minute^ oval, orange-colored 

 pupa, some six or eight in number, each one seemingly formed 

 within a separate segment of the larva's body. A tiny Ichneumon 

 will probably prove to be the insect which thus lives parasitically 

 within and eventually kills the larva of the C. Salicis. 



Remarks. — The writer is not certain hut the species of Ceci- 

 domyia now described, may prove to be identical with the C. Sali- 

 ,cina, which infests the willows of France. Being able to refer to 

 |but a meagre description of that species, he is unable to determine 

 this point decisively. That, however, is said to form its galls from 

 the huds of the willow, and if this statement be correct, the spe- 

 cies is, doubtlass, distinct from the one above described. 

 Salem, N. Y., March 4, 1845. 



All attempts to confine the blessings of religion, science, and 

 iberty, have been visited by judgments. Every aristocracy has 

 )een broken down, and all attempts to enslave, have resulted in 

 he ruin -of the author. The only safe course which a community 

 :an follow is, to extend far and wide every privilege, and dis- 

 jeminate every where the elements of knowledge. 



