120 



are most extensive along the Huerlano and Arkansas." — Prairie 

 Farmer, July 20th, 1867. 



"Ottawa, Kansas, July 22, 1867. — The Grasshoppers, what was 

 left of them — perhaps one for every fifty that we had last autumn — 

 staid here till their wings attained full size, and then got up and left. 

 The damage they have done to this part of the country amounts to 

 nothing. I am told that in some of the counties north of us they de- 

 stroyed a little grain before they left." — "S. T. K.," in Prairie Farmer 

 August 3, 1867. 



"Nehrask-a City. Nehrasl-a, July, 1867. — The season has been cold 

 and backward, yet favorable for small grains, until the Grasshoppers 

 hatched and commenced depredations upon our wheat, which has suf- 

 fered tremendously. Many fields will not be worth cutting. Some 

 fields of corn are badly thinned. Potatoes in some places are com- 

 pletely stripped, and our gardens are eaten through and through." — 

 Monthly Rep. Af/''- Dep., 1867, pp. 241—5. 



"Richardson Co., Nebraska, July, 1867. — The Grasshoppers have 

 destroyed nearly all the crops in this county and are still at work." — 

 Ihid., p. 245. 



"Douglas Co., Kansas, July, 1867. — The Grasshoppers have been 

 doing much damage in this vicinity, to all kinds of vegetation." — Ibid., 

 p. 245. 



"Cass Co., Nebraska, August 5, 1867. — The Grasshoppers have 

 done no damage of any account." — "A. G. B.," in Prairie Farmer, 

 August 10, 1867. 



The migratory propensity is developed, from time to time, in the 

 mature or winged Hateful Grasshopper in its native alpine home, 

 whenever it has increased in numbers so greatly as to become in- 

 stinctively aware that, if it deposits its eggs in the same district in 

 which it was itself raised, its future offspring will starve. In the im- 

 mature or wingless Hateful Grasshopper, so long as it remains in a 

 healthy state and finds plenty of suitable food at hand, no such pro- 

 pensity would, I think, ever be developed, because it has not yet ar- 

 rived at the time of life when the feelings connected with the repro- 

 duction of the species are called into play. Hence the fact, so often 

 set forth in the preceding extracts, as well as elsewhere, namely, that 

 the larvffi of those Grasshoppers, which had hatched out in the low- 

 lands, in the spring of 1867, had already shown a premature propen- 

 sity for migration, though they had plenty of good food at hand, seems 

 to prove that they were in a diseased and unnatural condition. I feel 

 confident, at all events, that no healthy grasshopper-larvae would ever 

 pass straight through a field of green grain, without stopping some 



