Miscellaneous Intelligence. 401 



V. Miscellaneous Scientific Intelligence. 



1. Notts on the Appearance and Migration of the Locust in 

 Mm,itnf>„ and t]n Xort/urest TrrUnries. Sumriicr of 1875; by 

 Gk,.r,;e M. Dawson. 1 8 pp. 8vo. (From the Canadian Nat- 

 uralist. )— Mr. Dawson states that in 1875 the hatching of the 

 locusts in Manitoba began in favorable places May 7th". an.l be- 

 '""",■ mmeral May 15th. The most northern local'itv was Mani- 

 toba Lake, in latitude 51°. The movement began in July, and 

 was most general durin- the latter half of the month and first of 

 Au-ust; and Hie direction was southeast or south, the insects 

 '! ■" ri > iisins- v instinct tin winds that favored their pur- 

 1"-". Many were carried into a country of thick woods, where 

 they did little barm, and few reached Minnesota. Others passed 

 over brookston, Polk County, Minnesota, and Fort Totten, Da- 

 kota; and probably the Siouv Citv locusts, mentioned by Mr. 

 C V. Riley, came from Manitoba. 



Other swarms of locusts came from the south across the 49th 

 "n ; 1; 1. villi a u .1, trout stretching from the 98th to the 108th 

 meridian, which differed from the natives of Manitoba, inasmuch 

 as they arrived before the latter were mature. These were "the 

 extreme northern part of the army returning, going northward 

 ; i'id northwestward, from the State- ravaged in the autumn of 

 1874." They appeared at Fort F.i June, and at 



Qu'apelle Fort on the 17th ; about Swan Lake House, their most 



t, July 10th. Fort Felly, farthe 



'Hn-ee farther south was reached Jul'y^th. About seven days 

 were occupied in the journey from the latter place to Swan River 

 Barracks, a distance of only* ten miles. 



Mr. Daws, n conclud. - tin t the pla .ting of belts of woodland 

 Would effect in turn a u neral -ion of the 



the forests in 1875 being perhaps due to the insects 



The journey southward was regardless of the direction fr.m 

 v parents had come the preceding year : and tln^e of 

 ■V'braskn, Missouri, I\ans:i< and i 

 Westward, returning on the course of their parents which had 



tended orei there borders of Texas 



almost to tl '■■ 'lie normal direction of 



of forest trees; the protection of the praii 



I ime for destroying the young inseel 



hatching grounds by fire ; the protection of insect-eating 1 



