12 
has some pale spots on the sides, and sometimes the posterior lobe is tinged with 
brown. Tegmina uniform green, somewhat transparent at the apex, and in some 
specimens faintly tinged with brown. Wings hyaline; nerves and nervules dark 
brown. Posterior femora greenish above and below ; pinnae of the disk alternately 
white and green, the white occupying the flat interspaces; inner face greenish yel- 
low. Posterior tibiae bright vermilion, the under surface being striped with yellow ; 
spines yellow at the base, tipped with black. Venter and pectus dark green, some- 
times varied with dark brown. 
Length of body — male, 1.6 to 1.75 inches; female, 2 to 2.25 inches; tegmina and 
wings about one-fifth less. 
This magnificent locust, which is fully as large as americana, was 
first described from Nevada and Arizona, but has since been taken in 
Utah, California, New Mexico, Texas, and across the border in the 
States of Chihuahua and Durango in Mexico. Several years ago the 
writer found it quite abundant in the vicinity of El Paso, Tex.; and 
Prof. C. H. T. Townsend, of the New Mexico Agricultural College, re- 
ports it as destructive to the Mesquite bushes and probably also to 
grape-vines in portions of New Mexico. Being strictly an arboreal in- 
sect, shoshone is liable to become more or less of a tree pest when 
numerous. In Utah this insect was taken by me upon various low 
trees growing on the lower mountain slopes back of Ogden, Salt Lake 
City, and near Garfield Beach. It was also occasionally taken in the 
valleys on Willows, and even upon some of the rank-growing herbs; 
but I have never seen or taken a specimen of it upon the ground. 
It has been treated here because of its occurrence in destructive 
numbers in 1891 in portions of New Mexico, and because its life as a 
tree-dweller is sure to favor its greater multiplication with the advance 
of civilization. 
THE SMALL GREEN LOCUST. 
(Acridium frontalis Thos.) 
Another one of our locusts belonging to the genus Acridium that has 
quite recently shown a tendency 
towards becoming a pest is the one 
bearing the above name. It was 
found by Prof. H. Osborn in south- 
western Kansas the i>ast summer, 
where it was doing considerable in- 
jury to the sorghum crop of that 
„ . .,. . ,".. . . . . . . .. rep-ion. It was also observed by me 
Fig. 3. — Ac naium frontalis — natural size (original). ° J 
in central Texas in the spring of 
1887, where it occurred in more than common numbers. 
The insect appears to be growing more and more fond of cultivated 
grounds, as is shown by its habit of congregating along wagon roads 
and the edges of fields among the ranker growths of the vegetation that 
is common to such places. In its haunts and food habits Acridium 
