38 
the disk black. Posterior femora crossed on the outer face by two light-brown 
bands; internally by two black bands. Apex black. Posterior tibia 1 yellow, with 
dark spines. Venter yellow. Dorsum blue with a yellow spot on center of each of 
segments 1—4. remainder brownish. Sides brown, antenna 3 rufous. 
Length of body— male. 28.5 mm , female, 43 mm ; of tegmina— male, 31.5 m,n , female, 
47mm. f posterior femora — male, 16 mm , female, 21 mm ; spread of wings — male. 67 
female, 100 mi ". 
As would naturally be supposed, if we were to judge from the ample 
wings with which it is provided, this insect is an excellent flyer. It has 
shown a tendency to migrate during the past summer in Colorado, and 
is reported to have come into that region from the southward in 
1890 prior to egg laying. These latter are deposited in the hard 
uncultivated ground in the localities most frequented by the mature 
insects. Whether or not more than a single cluster of them are laid 
by each female I have not yet ascertained. After hatching that 
spring, the young began feeding in droves, taking everything in the 
shape of grasses clean as they went; and at night, when not feeding, 
they clustered together upon the ground which they had bared. 
Although the insects were not so very numerous over the particular 
region examined by me, they nevertheless exhibited a decided desire for 
moving; still, they did not appear to want to leave the areas of bared 
ground above mentioned. Accordingly the country roads and edges 
of plowed fields were in great demand by them. During daytime the 
locusts would work out into the grasses for a few rods and feed, but as 
evening approached they reentered the plowed fields, roads, and other 
spaces not covered with vegetation. Judging from what 1 had seen of 
the insect on former occasions, and knowing something of the habits 
and haunts of the mature form, I was led to believe that the great 
amount of rainfall and consequent luxuriant growth of vegetation over 
the entire region during the spring and early summer had much to do 
with the massing of this insect upon these bared areas. Even the bared 
areas about the nests of the red ant that builds the dome-like nests of 
small gravel of common in the region west of the one hundredth 
meridian, frequently formed centers about which droves of considerable 
size gathered. Such areas about ants 1 nests were frequently seen that 
had been enlarged to from several yards to a number of rods in diameter. 
[Further to the southward, where Messrs. Snow and Popenoe had spent 
a week or more among the species, the insect was much more numerous 
and occupied the whole territory: hence these characteristics just men 
tioned were not so readily noticed. 
The food habits of the Long- winged Locust of the plains appeal- to 
be rather limited, when compared to that of the Eocky Mountain and a 
few other species of these insects that are older acquaintances. Both 
my own observations and those of Messrs. Snow and Popenoe indicate 
that this insect is, so far at least, a decided epicure, and will only feed 
upon certain grasses native to that region where it occurs. These are 
the Grammas (Bouteloua) and the Buffalo Grass (Buchloe dactylohles) 
