THE ROCKY MOUNTAIN LOCUST IN 1^82. \3 
when the locusts struck the northwest corner of the field as thej came 
from that direction with a northwest wind, they drifted by to the west, 
avoiding all that portion of the fi<-ld to the leeward of the sugar-cane 
and broom-corn, hut taking everything elean diagonally across where 
the field was unprotected by these two plants; the supposition being 
that the wind in passing over these plants carried with it something 
offensive either to the sense of scent or taste of the locust. The wild 
grasses of the genus Sorghum, of which several varieties occur in the 
West, are also shunned by this insect. 
Mr. Talbot also claimed that quite a number of young locustfi had 
hatched and were now batching in the hills lying to the east and north 
of Sioux City. 
Had not much time or would have none out and examined them to 
see whether or not they were G. spretus. 
Bismarck. Dal:., June 24. — To-day we were out on the hills in the 
vicinity of the city, and found some C. spretus, mostly all fledged and 
in healthy condition; a few other species, as ('. occidentalism II< 
CU8 coralipes. Stenobothrus, &c. C. spretus is quite common but not 
numerous : no damage anticipated. 
Between Bismarck and Fort Buford. at various wood-stations, C\ 
spretus and other Caloptenus larvae and pupa? were noticed, but nowhere 
in great numbers. At Fort Buford, June 29 and 30; young locu> 
numerous species quite plentiful in the hills and flat lying to the north 
and northwest of the post. C. spretus most numerous where vegetation 
is rankest. • 
Geonietrid larvae found on a wild gooseberry bush in hills north of 
here. 1 Yucca moths (Pronuba yueeaseUa Riley) quite abundant on blos- 
soms of Y. angustifolia; also several species of ants that appear to con- 
gregate for sweets exuded by plant. None of latter saved. 
Some Meloidse found on the blossoms of sunflower and thistle. 2 
one species of Bee-fly. Latter quite common though not abundant. 
Lepidoptera quite scarce. Only a few diurnals noticed, chiefly Pyra- 
ntel hunt era. 
June .'JO.— Collected, on low grounds near the riverj some Oleridffi on 
flowers. Also some Hymenoptera from weeds, where they were appar- 
ently for the purpose of destroying insects. Caloptenus birittatus quite 
common, and even numerous at some places on the bottom lands, where 
they feed upon rank vegetation, weeds, &c, just ;^ they do in Nebraska 
and Iowa. 
Mosquitoes numerous enough to interfere with work: very ravenous 
in their attack. Old settlers, however, mind them but little. 
Fort Buford, July 1. — Were in hills north of here, and found some 
interesting <'icin<icli<la among ravines in bad-lands, quite numerous,' 
Eufitchia ribearia (Fitch), 
ana Lee. ami I I <■<•. 
■ t' S\ stoechus and Triod 
