^2^^ 



GRAPE-VINE TOMATO-GALL. 



LdKiopleni rids ( ). S. 

 Model in wax of tho ahnoiinal growths on tciininiil twigs of the 

 gra])o, causod by tiio sting of a little gnat. 



GRAPE-VINE PHYLLOXERA-GALL. 



I'hi/llo.icra niKtdlri.r Planch. 



Model in wax of the galls produced by the leaf form of the grape 

 Phylloxera, showing thoir charactoristic appearance and disposition on 

 the leaf. 



SOCIAL GRAPE CATERPILLAR. 

 l/iirrisitKi (unericdiKi llarr. 

 Twigs of grape-vine modeled in wax, showing the characteri.stic 

 aj)pearanee and work of the larva' and their method of feeding in 

 uniform rows on the leaf. 



THE GRAPE-SEED WEEVIL. 



' 'rn])o>iii(if imrqiuilifi Say. 



A bunch of grapes, showing damage to the berries b}^ the larvse of 

 this insect; also punctures made by the female beetle in oviposition. 



THE SILKWORM. 



Bomhiix (Sericaria) uiori Linn. 



Enlarged model of the larva, showing its complete anatomy; the 

 nmscles, nerves, tracha*. viscera, the silk apparatus in its whole extent, 

 the silk-secreting gland, and the gland discovered by Auzbux, which 

 secretes a licjuid, the use of which is most probabh' to convert the 

 silky matter into insoluble threads. In one of the prolegs may })e 

 .seen tin* muscles which nu)ve the claws and sucking disks which enable 

 the animal to walk with its true feet in the air. 



Knlarg(>d models of the moths, male and female. In each model is 

 ^how M the at rophy of thi> digestive tube and the development of the 

 niai\ (dous organs by which the species is perpetuated, (After Au/ojix.) 



HOP PLANT-LOUSE. 



I'hnrn<l<,„ Innnni; Sclir. 



rN.\i"i'K('Ti-:i) lloi" Plant. .V spray of hops, modeled in wax, r(^]>re- 

 scnting the plant as it appi^ars in \igorous grow ing condition, and free 

 from the attacks of its ])i'inci])al enemy, the ho]> ])l!int-louse to eon- 

 tr;i-t the stronger foliage and the moic altiiiKlant ami larger ho]is 

 produced by plants from which the hop joiisc lias Ixtm eradicated l»y 

 the u.se of jjropei- remedies. 



AffkctkI) llor Plant. — A spray of hops modeled in wax. repre- 

 senting the \ ine as it ai)i)eai-s when attacked l)y the hoj) plantdouse. 

 showing the blackening and discoloration of th(^ leaves and the small 

 and inferior hops which are also discolored and otiierw isc un>-uitab|c 

 for market. 



