INSECTS INJURIOUS TO AGRICULTURE 



has discovered that, like the European hop-louse, it la, 

 at the approach of cold weather on n : the \ 



The Hop-worm {Hypena humuli Hani.-). In June, and 



Fiu. •,*.">) Hop-worm, pupa, and moth; all natural si/..-. 



again in July and August, hop-leaves are devoured I » v 



active, slender, grass-green caterpillars, with but four pairs 



of abdominal l< 



Kkmi dies Han I picking and vigorously shaking the vines twice 

 a day, as w 1 11 as sprnj ing the \ ines witb whale <>il Boap, are advisable. 



Injuring the Grape-vino. 

 The Phylloxera {Phylloxera vastatrix Planchon). — By 



Flo. 8B6w— Tbo Phj lloxera, wingless leaf form, a, under. b,u| i 

 hatched larva; c, egg; ./. section of the leaf-gall cotitaiui 

 sw.-iiin;; of tendril; /, side, <:. upper, h. under, view ol Ui< 

 i, antenna; j. two-Jointed tarsus.— After Bill 



Ear the most destructive inset of the vine - - Aphid. 

 It exists m two forms, one raising irregu i _ ilia on the 



