﻿OF THE STATE ENTOMOLOGIST. 137 



Iq 1860, as several Kansans have informed me, these locusts came 

 and did much damage around Topeka, remaining a few days and leav- 

 ing the last of August. This must have been a limited and rather 

 local swarm. 



In 1864 we again hear of locust invasions into Manitoba, Minne- 

 sota, and around Sioux City, Iowa, and their eggs hatched and the 

 young did much damage the following year, 1865. In Colorado one of 

 the most destructive visitations ever known there come in 1864 from 

 the northwest, doing much damage, as did the progeny in 1865. 



The year 1866 was another marked locust year, and the first, since 

 that of 1855, in which the damage was sufficiently great and wide- 

 spread to attract national attention. The insects swarmed over the 

 Northwest and did great damage in Kansas, Nebraska, and North- 

 eastern Texas, and invaded the western counties of Missouri very 

 much as they did the past year. They came, however, about a month 

 later than in 1874. They were often so thick that trains were seriously 

 delayed on account of the immense numbers crushed on the track. 

 Mr. Walsh has published a full record of this invasion in the Report 

 already cited.* 



In 1867 the progeny of those which fell upon the country the pre- 

 vious year did more or less damage, which was extensively reported 

 during the early part of the growing season. Later in the season, 

 however, fresh swarms came from the Rocky Mountain region and 

 fell upon the fertile plains of the Mississippi Valley. Thus there 

 were two fresh invasions, the one following the other, in the years 

 1866 and 1867 ; an occurrence which is quite exceptional, and to 

 which the immense damage done during the latter year is, in great 

 part, attributable. Mr. Walsh {Jioc. cit.) has given us, at great pains, 

 a pretty full record of the doings of locusts in 1867, and from said 

 record he makes it quite clear that the invasion of 1866 was followed 

 in 1867 by a fresh, though less extensive one, direct from the Rocky 

 Mountain region. I may add that a number of scraps and records of 

 the insect's doings during those two years, other than those he has 

 brought together, bear out his deductions. The locusts also fell upon 

 Utah in immense swarms in 1S67. 



During the subsequent years of 1868 and 1869 we hear more or 

 less of the remnants of these two vast swarms from the mountain re- 

 .gion, and of their injury in the Mississippi Valley ; but their numbers 

 are always diminishing and their enemies increasing, so that during 

 the latter year not a healthy individual was to be found, and in 1870 



•First Annual Rep. as Acting State Ent. of Ills., pp. 83-4 (1868;. 



