Insects iNjURioui to the Potato and Ati-lk. 



573 



bj riddling them causes tliein to wilt and die. The larva 

 also feeds upon tlie leaves of niauj plants. Watering 

 the leaves of infested plants with lime water, Paris green 

 "water, or similar compounds, will probablj prevent the rav- 

 ages of this insect. 



There is a common beetle in this State which is some- 

 times mistaken for tlie striped potato beetle, or Colorado 

 beetle. It is commonly called the three-lined leaf beetle, 

 Lcvia trilineata, Olliv.^ figures three and four. It is one- 

 fourth of an inch lonij, of a vellowish color, witli two black 

 dots on the thorax, and three black lines along the back. 

 It is about one-eighth of an inch Inroad. 



FiPx. 3. 



THREE LINED LEAF BEETLE— LEMA TRILINEATA, OUid. 



a, larva with coatins; of excrement; b, end of abdomen (seen from 



above showing position of vent ; c, pupa ; d, eggs. 



THREE-LINED LEAF BEETLE— PERFECT INSECT. 

 This insect, in both larval and adult state, feeds upon 

 the leaves of the potato. The eggs (figure 3, d,) are 

 laid in yellow clusters upon the leaves. In about two 



