THE ROCKY MOUNTAIN LOCUST IN 12882. 15 
traction to certain species of insects. Hence this will be a splendid 
collecting ground, and we will undoubtedly find some interesting forms, 
Our camp was made about midway from the first of these “ hog- 
backs” to the first low range of mountains on the bank of Mill Creek. 
This stream is a beautiful one, and flows through a rocky canon that is 
quite picturesque with scenery. The stream heads way up among the 
timbered portions of Victoria Mountain, and forms a way for running 
the lumber material down to the saw-mills situated at the lower end of 
its course. 
Hymenoptera are not numerous in species, but quite plentifully rep- 
resented in individuals, the most attractive being the various species 
of humble bees and hornets which frequent flowers. Of these insects 
there are quite a number of gaily-colored forms, of which we obtained 
a fair series. Ants, too, are very numerous, but few in species. These 
are chiefly under stones, but two or three species frequent decayed logs 
or burrow in the earth, and form hills of sticks and small stones. 
From some of these we obtained several parasitic beetles—one form, of 
which there are very likely two species, being a “ pill-beetle,” and the 
others small Staphylinide and allied forms. Of these we also obtained 
a fair representation. Orthoptera were common, and of a fair number 
of species. These, of course, we tried to obtain in all their varieties. 
One misfortune against which we had to contend, and which I regret 
very much, is the loss of a large number of our pinned specimens, by 
mice, thus making it quite difficult to classify from alcoholic specimens 
alone. I had made it a point to pin all odd or new looking forms, in 
order to retain as nearly as possible their original colors, and as there 
were some of which I only obtained one or two specimens, or repre- 
sentatives, these are lost. Others, again, change their colors to such 
an extent after immersion in alcohol as to render them unrecognizable 
when seen fresh. 
Among these were numerous forms of Caloptenus (Melanoplus), some 
of which very closely resemble the migratory species in many of their 
characters, though differing sufficiently not to be confounded with that 
insect. None of these, though watched very carefully, exhibited the 
migratory trait, except, perhaps, Camnula atrox, which is quite com- 
mon on some of the hay flats. It did not, however, appear to gather in 
great numbers, or to move in unison as does C. spretus. None of their 
movements noticed by me could strictly be called migrations; but at 
various times I saw individuals or even small groups of them rise sev- 
eral yards into the air and move to some other locality from fifty feet 
to a hundred or more yards distant. 
Such species as we found identical with those in the Western and 
Middle States differed in no respett from them in habits, and hence 
were but sparingly collected, save perhaps in a few instances. 
There are some Pezotettigos that may be new. These appeared to be 
rather rare, and were only found high up in the mountains, and quite a 
