15 
etc., like those of all ground-laying species. The young commence 
hatching about the middle of March and continue to appear until into 
April. After molting the first time and becoming a little hardened 
they immediately climb up the trunks of the trees and bushes of all 
kinds and commence feeding upon the new and tender foliage. They 
molt at least five or six times, if we may take' the variation in size and 
the difference in the development of the rudiments of wings as crite- 
ria. The imago or mature stage is reached by the last of May or dur- 
ing the first part of June. 
"The species is very active and shy in all its stages of growth after 
leaving the egg. The larva and pupa run up the trunks and along tin- 
limbs of trees with considerable speed, and in this respect differ con- 
siderably from all other species of locusts with which I am acquainted. 
I am informed that the mature insects are also equally wild and i fly 
like birds.' They feed both by day and night; and I am told by those 
who have passed through the woods after night when all else was quiet, 
that the noise produced by the grinding of their jaws was not unlike 
the greedy feeding of swine. 
'-Aside from its arboreal nature there is but a single instance men- 
tioned of its preference for growing crops. This was a small field of 
either cotton or corn, or perhaps both. If the nature of the crop was 
told me at the time, I have forgotten. At any rate the crop of one or 
the other of these two staples gtfew in a small clearing in the very midst 
of the most thickly visited area. The mature insects alone were the 
offenders in this instance. During the daytime they would leave the 
trees in swarms and alight upon the growing crop and feed until even- 
ing, when they would return to the trees. If, during the day. they were 
disturbed, they immediately took wing and left for the tops of the sur- 
rounding trees, to return shortly afterwards." 
Mature specimens of this locust have since been obtained, which show 
the insect to be congeneric with Dendrotettix guereus Riley MS., a species 
found upon the oaks of .Missouri, southeastern Nebraska, and southern 
Iowa and Illinois. Longipennis occurs in two forms, i. c. with either 
well-developed wings or with those appendages in a rudimentary con- 
dition. 
THE DIFFERENTIAL LOCUST, 
(Melanoplw differentials Tims.) 
Very conspicuous among the •* native species" of locusts in the Mis- 
sissippi Valley and southwest ward is the one which entomologists call 
Melanoplus differentialis. This insect is fully as large as the common 
two-striped species thai is familiar to everybody who has noticed any 
inseets of this class, but differs from it in being yellowish throughout 
and lacking the two stripes along the sides of the back and wings. 'The 
Differential Locust is also less robusl in form than the one with which 
