INSECTS INFESTING LETTUCE. 



CHAP. I 



The Lettuce Aphis ( Siphonvphora lactu- | The Cabbajje PUisia (I'lana (jnissicir.) Als 

 cm) 228 . attacks Lettuce. 



CHAPTER CCXXVril. 



The Lettuce Aphis. 



( SiplioiKiphora hirfurx f) 



Order, Hemipteka ; ) j. ., . 



. , T , ' , xj ' . 1' aiiiuv. Ai'iiiDiji.E. 



bub-Order, Horopter A ; 



[The measureiiieuts of insects in tliis woik are ,Lci\ en in inches and lines. The above cut tep- 

 resents one incli ilivirled into Hnes and tractions thereof.] 



[Living upon the leaves of the garden lettuee, whieh they 

 puncture with their Ijeaks and imbibe the sap ; small green 

 plant-lice, usually marked with black or brown.] 



The wingless lice are green or brown, usually marked with 

 black dots. 



The wdnged lice are green, the head and thorax sometimes 

 black or brown. 



Remedies. — Spray with No. '■'> or Xo. 4, or use Xo. 8o oi; Xo. 

 85. 



