TNSEOfS rNFESTING THE a RAPE. 



171 



These l)eetle8 (Fig. 150) vary in length from a little over an 

 inch to an inch and eight lines, and aj'e of a brownish black 

 color ; on each side of the thorax are three teeth, the middle 

 one the most prominent. 



There is another l)eetle very closely related to the above 

 species, which, like the latter, also infest the roots of grape 

 and hop vines in its larva state. This is knoAvn as the tile- 

 horned prionus {Prionix imbricornU). It differs from the 

 broad-necked species in having from sixteen to nineteen joints 

 in each antenna, whereas those of the broad-necked species 

 have only twelve joints. 



Remedy. — Use No. 99. 



CHAPTER CXV. 



The Grape-root Louse. (Cal.) 

 {PhyUoxvra rudtatrix. — Planchon.) 



Order, Hemipteka ; / 



Sub-order, Homopteka ; \ 



Familv, Aphiuid.i-;. 



[A minute yellow louse, feeding upon the roots of the urape 

 ^'ine.J 



' Fig. I.")!. — (;raj>c 



Root Louse ( I'oot- 

 inhabiting foi'm) ; 

 a, an infested root ; 

 />, hibernating k)Use 

 enlarged — c d ] o )•, 

 yellow : r, its an- 

 tenna enlargerl ; <], 

 one of its legs en- 

 larged ; <',_/', and y, 

 the lice enlarged — 

 II- '. .*.*.1a t'olor, yellow ; /, a 

 tubercle enlarged ; 

 /( and _/, granula- 

 ^'^'^- tions of the skin, 

 enlarged ; //, the 

 simple eyes, enlarged. I will not give an extended descrip- 



