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9 > Image 9 of Annual report. 1890

Part of Kentucky Agricultural Experiment Station

N li ` s: Ti . 4 )f OBSERVATIONS ON FARM PESTS. 1 e- _ * br, I . H l` i i nw n. exnwxn, r:Nro1tot,o<>tsr .-mn B 'r,xNtsrotirz 12-pznzwfrifr/, Offrjl. )f This insect is deserving of special attention just now because I E it ap; eats to be undergoing a change ol' habit sitnilar to those , [S undergone in the past by sevrral other native American insects, jl np and probably due to the dest: netion by the cnltivatioii of land, h and by grazing. of the wild plants upon which it has hitherto I f subsistcd. Tlzis explanation of its sudden ap, earance recently 1 over a wide extent of territory as a coin-iniesring insect, serine ji _ to me the only one warranted by the published facts of its his- * tory. li Until 1888, ,D??ClZ)7`OU/YL ]*?])?LlZC[(ZZ(L did not appear in the T li literature of economic Entomology as an iinptrtant eneniy of l I any of our staple crops. Mr. R. P. \Valsl1, writing in 1866 (Pract. Ent., I, 110) and rteferrincg io the beetle, states that "it ifi is very injurious to flowers especially to Dahlias," and inlers that i it is in part iezponsible for an injury to tl1e leaves of melons, I cucumbers and other plants, of which one of his correspondents J] complains. , 1 , . In 1868, \Valsh and Riley (Ain. Ent. Vol. I, 227), in iw ply to a correspondent in Busliberg, Missouri, wrote of the same beetle: V " The yellow beetle with twelve black spots which we herewith r illustrate (Fig, 168, twice natural size), and which has been so destructive to your watermelons and Hubbard squashes, is the 12spotted Diabro1ica." In the same place, in reply to R. D. T Parker of Manhattan, Kansas, these authors state that insects { sent to them for deteiminaaion are also D. lipzmclatca. , In 1870, Prof. C. V. Riley (2d Missouri Report, 66) wrote I l