. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 230 Agrioultural Experiment Station, Ithaca, N. Y. the text-books mentioned. For these reasons it has seemed best to use the popular name, the Four-Lined Leaf-bug, in this bulletin, Thk Life History of the Pest. Heretofore but little has been known of the life history of the Four- lined Leaf-bug. The earlier observers have given us graphic and quite accurate accounts of its habits and manner of workinof. And unfortu- nately they tried to reason out its l
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 230 Agrioultural Experiment Station, Ithaca, N. Y. the text-books mentioned. For these reasons it has seemed best to use the popular name, the Four-Lined Leaf-bug, in this bulletin, Thk Life History of the Pest. Heretofore but little has been known of the life history of the Four- lined Leaf-bug. The earlier observers have given us graphic and quite accurate accounts of its habits and manner of workinof. And unfortu- nately they tried to reason out its life history from their knowledge of the life histories of allied insects. " Bad matters have been made worse " by later writers who have not tried to verify from observation the guesses of the early observers ; and in consequence most of the pre- ventive methods at present recommended to control this pest, being based upon the old theories, are found to be entirely useless when its true life history is observed. It is curious how some of these unfortunate guesses of the earlier entomologists will cling to the literature and be handed down by later writers until it seems almost presumptuous to doubt them. Our obser- vations upon the Four-lined Leaf-bug during the past two years have shown it to be a striking example of the necessity for more observations upon our common insects and less theorizing on the guesses of earlier writers who, however, *' builded the best they knew " with their meagre facilities and left works which are mines of entertaining and useful information. All of our observations have been made upon the pest as it works upon currant and gooseberry bushes, but the discussion will consider its other food-plants as well. Our attention was first called to the insect in the latter part of June, 1892, after it had reached its adult stage. Many observations were made to discover the eggs of the insect, and failing in this, every available hiding place w
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