300 REPORT OF THE SECRET ART OF THE 



(Eur 1/0)17 fa inda and E. mela7ic1iolica), aud disfigured by a 

 variety of other insects, while the skin is often gnawed off 

 and corroded by the larva) of the Eose Leaf-roller {Loxoicenia 

 rosaceana, Harr.) ; and even the seed, if it should be pre- 

 served, will be attacked by the Grain Silvanus {Silvanus 

 surinamensis, Linx.), the Dwarf Trogosita {T. nana, Melsh), 

 and the larvfc of one or two small moths. And, as to the 

 leaves, they are not only sapped and curled by the Apple 

 Plant-louse [Ajjhis w?«7<', Fabr.), and by leaf-hoppers; rolled 

 by several leaf-rollers ; folded at the edges by a small, pale, 

 undescribed Avorm which I shall soon describe ; blistered by 

 the Eosy Hispa ( Uroplata rosea, Weber) ; crumpled by the 

 Leaf Grumpier {Phycita neiula, Walsh), mined by the Apple 

 Micropteryx {Micropteryx ptomivorella, Pack.) : skeletonized 

 and tied together by another undescribed worm, which I shall 

 some day name Acrohasis Hammondii, in honor of one of 

 your members, — but they are greedily devoured by a whole 

 horde of caterpillars, from the tiny Micropteryx to the 

 immense Gecropia Worm, some of which confine themselves 

 to the parenchyma, some to the ej)idermis, some to the tender 

 parts, without touching the veins, while others bodily devour 

 the whole leaf The sap forms the sole food of some insects, 

 aud even when the poor apple tree dies, a host of dififerent 

 insects revel in its dead and decaying parts, aud hasten its 

 dissolution, so that it may the more quickly be resolved into 

 the mold from Avhich it had, while living, derived most of its 

 support, and through Avhich it is to give nourishment for the 

 young trees which are to take its place. 



Thus we perceive that there is not a single part of the apple 

 tree which is not made to cradle or to give nourishment to 

 some particular insect, aud the same might be said of almost 

 every plant that grows on the face of the earth, even those 

 which produce resinous or gummy substances, or which are 

 pithy in the center, having special insects which feed upon 

 these parts and on nothing else. There are insects — the gall 



