THE ARMY-WORM. 243 



But, while we say this in praise of the work done, we wish 

 to say, that, in our judgment, young men who are to be 

 practical farmers should know thoroughly the common 

 things around them. The students of the Agricultural Col- 

 lege should be able to name and give a full account of all 

 the grasses and other useful plants likely to be found on 

 any farm. The common weeds even are worthy of the 

 farmer's study, that he may protect himself against them. 

 The young men in the college should know how to make 

 property, and should have the will to protect it. Care of 

 ground and buildings is a good preparation for successful 

 business and good citizenship. 



O. B. Had WEN, 



Chairman of Committee. 



The report was read, and laid over. 



The following essay, having been submitted to the Boston 

 Society of Natural History, from which it received the first 

 Walker Prize, was offered to the Board for publication, as 

 the best method of reaching those for whom it was de- 

 signed. 



A COMPLETE LIFE-HISTOEY OF THE ARMY-WOEM {Leucania 

 Unipuncta) AND ITS PARASITES. 



BY PEOF. C. v. EILEY. 

 " Tlie facts are what toe want." 



Having, during the past year, ascertained certain hitherto 

 unknown facts in the life-history of the Army-worm, the 

 author submits the following memoir on the subject, proposed 

 for the Walker Prize for 1877, premising only that it is large- 

 ly condensed from his other writings. 



All accounts of this insect, previous to the year 1861, are 

 characterized by inaccuracy and confusion. During that 

 year, however, by the contemporaneous observations and ex- 

 periments of several well-known entomologists and agricul- 

 tural writers, — prominent among whom were Benjamin D^ 

 Walsh and Cyrus Thomas of Illinois, J. Kirkpatrick and J. 



