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ochreus, Lee, which breeds in the roots of Scirfus and 

 PhraginileSy being the most conspicuous in this sort of dep- 

 redations. In similar locahties I have found both Lislruno- 

 tus appcndiculatns^ Boh., and Eyrcus ■ptcncticoUis^ Lee, de- 

 stroying young cabbage that had been transplanted on a 

 reclaimed swamp. These species, with others, doubtless, 

 were linCTerinir about their ancient habitat, and attacked 

 these plants because of hunger, as they do not occur the 

 second year, provided their natural food plants have been 

 effectually exterminated. What must finally become of these 

 species that, unlike several species of JVoctuidcc, CranibidiC, 

 Elateridtc and Lachnostcrna^ whose larva; have been always 

 accustomed to live in or on the roots of grass, and therefore 

 can more easily adapt themselves to the changed conditions 

 by subsisting upon the cultivated plants of the farmer ? 

 They must, of necessity, become wanderers and lead a vag- 

 abond life, until they find some secluded nook where they 

 may continue to exist in too limited numbers to attract the 

 attention of any but the entomologist. If one will only 

 watch closely and patiently he may witness the process of 

 adaptation going on about him. During April, 1S87, in 

 Tensas parish, Louisiana, I found the larvae of our Twelve 

 Spotted Diabrotica, D. 12 punctata, Oliv., very destructive 

 to growing maize, a fact not before recorded, and in Octo- 

 ber, 1890, near Lafayette, Indiana, I found a larva of this 

 same species feeding on the roots of wheat, while this fall 

 we have reared the adults from wheat plants, grown out- 

 side and later transplanted to the insectary. This is only 

 one of many illustrations that might be given. But of the 

 few that can thus adapt themselves to a changed environ- 

 ment, more need not be said, as, doubtless, many more are 

 unable to do this, and therefore must necessarily become 

 wanderers and vagabonds, like tramps, drifting about from 

 place to place and sooner or later to extermination. Some 

 of them perhaps drift a long distance from their former 



