(B.) 



INSECT DEPREDATORS UPON THE APPLE-TREE. 



The following are all the United States species (one hundred and 

 seventy-six in number) that are known to me, or liave been reported 

 upon accepted authority, as depredating upon the Apple-tree. The list 

 will, without doubt, be largely extended ; it is published at this time 

 to serve as the basis for future additions. An entire exploration of 

 our entomological literature might add nearly or quite fifty species, 

 and cai-eful observation would unquestionably give us no inconsiderable 

 number which have not yet been recognized as apple insects. 



It is hardly necessary to state that not all the species here recorded 

 are to be included among those injurious to the apple-tree, but as each 

 one is known to make it, at times, its food-plant from choice (many 

 others will feed upon it in confinement),* the least harmful among 

 them may at any time, through such sudden and inexplicable multi- 

 plication as is often witnessed in the insect world, become seriously 

 injurious. 



The authority for including the species in the list is given in each 

 instance. For the convenience of those who may be willing to scruti- 

 nize the list with a view of supplying omissions, the species have been 

 grouped under their several orders, and for the most pitrt, in their 

 latest systematic arrangement. 



Lepidoptera. 



Diurjials. 



Papilio Turnus Linn. Turnus swallow-tail Harris, Ins. Inj. V'eg., 268. 



Limenitis disippus GoDT. Disippus butterfly Scudd., Bui. Buff. Soc, ii, 250. 



Limenitis Ursula (Fabr.). Ursula butterfly Riley, Amer. Ent., ii, 276. 



Thecla strigosa Harris. Streaked Thecla Scudd., Bui. Buff. Soc.iii, 111. 



SpJiingidcB. 



Deilephilalineata (Fabr.). White-lined Sphinx Riley, Amer. Ent., i, 206. 



Smerinthus excJEcatus (Sm.-Abb.). Mind-eyed Sphinx .. . Harris, Ins. Inj. Veg., 327. 



Sphinx drupiferarum (Sm.-Abb.). Plum Sphinx Lintner, Proc. E. S. Ph., iii, 658. 



Sphinx Gordius Cijam. Apple Sphinx Harris, Ins. Inj. Veg., 328. 



*Mr. R. Thaxter has found that nearly all of the Scopelosoma larviB, and many others of 

 Noctuid genera, will eat the leaves. 



