178 REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 



(lered almost certain from the fact that it was between the date of de- 

 parture from Texas and arrival at Black Hills that swarms were first 

 seen passing over various parts of Eastern Colorado, Western Kansas, 

 and Western Nebraska. It is possible that these composed a part of 

 the swarms which, in the latter part of July, moved northwest from 

 Black Hills into Montana, but it is more likely that these were com- 

 posed of locusts hatched in this locality. That all which left the coun- 

 try south of Kansas previous to the time those in that State began to 

 move — 1-15 of June — did not go to the Black Hills region is evident 

 from the fact that swarms are reported as passing northward over 

 Kearney, Hall, Merrick, Butler, and Dodge Counties, Nebraska, 

 between the 16th and 25th of May. That none of these continued their 

 northward course through Dakota is proved by negative evidence as 

 X)ositively as such evidence will prove anything in a case of this kind. 



Letters from the southern part of Dakota, at points along the Missouri, 

 from Sioux City to Fort Eandall, state positively that no swarms were 

 seen until 14:th to the 16th of June. Farther up, on the eastern border 

 of the Territory, in Brookings County, a swarm or two were seen about 

 the 9th or 10th, but the report leaves the direction uncertain j a small 

 number are reported flying at the same time in Eamsey County, Minne- 

 sota, with the same confusion as to direction j on the same day a swarm 

 is reported in Benton County, Minnesota, moving southeast. 



The last two are doubtless errors, and those seen in Brookings Coun- 

 ty, Dakota, were probably moving northeast, as it is certain a swarm 

 came down in Becker County, Minnesota, on the 10th, where they re- 

 mained until July 1. Mr. Packard returned from Montana by way of 

 the Missouri Eiver and the iSTorthern Pacific Eailroad in the latter part 

 of June, reaching Bismarck the 28th. S@me swarms were reported as 

 passing northward at some points west of Bismarck, though apparently 

 not very heavy or many in number. The first which passed over Bis- 

 marck, so far as he could learn, and as our correspondence shows, was on 

 the 20th, though a large flight was said to have passed over Standing Eock 

 on the 18th, moving westward, which was evidently a part of the great 

 flight that reached Sioux City on the 14th. A part of this flight (which 

 passed Sioux City on Mth June) reached points on the Northern Pacific 

 Eailroad in Dakota from 18th to the 20th. None are reported at Fort 

 Totten until in July, and then in small numbers flying over back and 

 forth, north and south, but none of these reached Manitoba or passed 

 into British America. It is certain, therefore, that no part of the earlier 

 flights passed on to British America, Dakota, or Montana, unless they 

 stopped on the way and afterward joined the June flight which left the 

 latitude of Northern Kansas between the 10th and 15th of the month 

 (June). The light column which passed over Southeastern Dakota and 

 moved on to Becker County, Minnesota, probably belonged to the early 

 flight, but, as has been shown, these had proceeded nofiirther northward 

 up to the 1st of July. 



