94 MANUAL OF GENEBAL AGKICULTURE 



Beetles : 



June bug or May beetle, Colorado potato beetle, lady bug, click 

 beetle, flat-headed appletree borer, firefly, rosebug, striped cu- 

 cumber beetle, cucumber flea beetle, pea wee-sal, blister beetle, 

 plum curculio. 

 Larvae : 



Larvae of beetles (grulbs), larvae (caterpillars) of moths and 



butterflies, larvae of saw-flies. 

 INSECTS WITH SUCKING MOUTH-PARTS: 

 True Bugs: 



Four-lined-leaf-bug, red-bug, bed-bug, chinch-bug, squash-bug, 

 stink-bug, cicada, leaf hopper, aphids or plant lice, pear-tree 

 psylla, San Jose scale. 

 Moths and Butterflies: 



Codling moth, bud-moth, clothes-moth (larvae have biting mouth- 

 parts), peach tree borer moth (larvae have biting mouth- 

 parts), canker-worm moth, measuring- worm moth, cut-worm 

 moth, tomato-worm moth, Cecropia moth, Polyphemus moth, 

 Luna moth, tent caterpillar moth, Cabbage butterfly, Monarch 

 butterfly, Viceroy butterfly, Red Admiral butterfly. Mourning 

 Cloak butterfly. 

 Adults of two-winged flies: 



Mosquito, black fly, horse fly, syrphus fly, bot fly, house fly, horn 



fly, blow fly. 

 Bees and Wasps: 



Yellow jacket, hornet, carpenter bee, bumble bee, leaf cutter bee, 

 honey bee. 



Of the insecticides chief among the poisons are Paris 

 Green and arsenate of lead. Among the contact remedies 

 lime, sulphur and tobacco. Obtain without cost the third 

 reference "Destructive Insects and Their Control" and 

 experiment with one each of the two classes of insects 

 found destructive to vegetation in your region. Every 

 experiment station publishes literature on the control of 

 insects within its State so that it is possible to obtain defi- 

 nite information about almost any destructive insect. 



PART VI. TESTING MILK AND ITS PRODUCT. 



70. EXPERIMENTS WITH MILK. 

 Materials: Milk, microscope, litmus paper, rennet, 

 two evaporating dishes, dilute acetic acid. 



(a) Examine a drop of milk with a microscope. 

 Make a drawing. 



(b) Test the reaction of milk with litmus paper. 



