INSECTS INFESTING THE PLUM TREE. 



CIIAF. 



The Phiintiee Aphis {Aphit pruni) 78 



The Phuu Leaf-hopper {Bythoinipua ditel- 



lariu.'!) 79 



The Plum Cureulio (Conutraehelits nenu- 

 phar 80 



The Phmi Gouyer (Anthonomii^ prunicida).81 

 The Phiin Moth {Sruiasia pruniana) 82 



The foUowintc insects also infest the Plum 

 Tree: 



The San Jose Scale (Ai<pidiutus pernivionux). 

 The Greedy Scale (Anpidiotus rapax). 

 The Lemon-peel Scale ^Aspidiotus tierii). 



The Peach-tree Borer (Aegeria exitiom). 

 The Pear-tree Scolytus {Scolytus pyri). 

 The Buffalo Tree-hopper {Cerexa bubalus). 

 DeLong's Caterpillar (Clmocampa coiulricta). 

 The Tussock Moth (prygia leucosUnrtut). 

 The Red -humped Caterpillar (A'oJodonta fon- 



cinna). 

 The Apple-leaf Grumpier {Phycita nebulo). 

 The Red Spider (Tetranychus telanun). 

 The Robust Leaf -Beetle (Serica valida). 

 The Green Fruit-Beetle {GymnetU nilida). 

 The Thrips. 

 The Peach Moth {Anarua Uneatella.) 



CHAPTER LXXVIII. 



The Plum Tree Aphis. (Cal.) 



[Aphis pruni. — Koch. ) 



Synonym. — A . prunifolia. — Fitch. 



Order, Hemiptera ; } 



Sub-order, Homoptera ; \ 



Family, Aphididj^. 



I 1 ll M 1 I I I I hhl 



(The measurements of insects in this work are given in inches and lines. The above cut rep- 

 resents one inch divided into lines and fractions thereof.] 



[Living on the under side of the leaves of the plum, which 

 they puncture with tlieir heaks and extract the sap ; small 

 greenish plant-lice, usually marked with black.] 



The wingless lice are greenish-white ; or the head is black, 

 the thorax green, with two transverse black lines, and the 

 abdomen is green, dotted with black, and marked on the top 

 with a large dark colored spot. 



