55 
in any number in spring to resort to the dozers at first opportunity. I 
believe active use of these measures will be effectual, with a cost but 
trifling compared with the value of the erop to be saved. 
The information as to the species and the measures needed are cov- 
ered very fully in your Bulletin on Destructive Locusts, and with some 
specific instruction regarding the treatment of ditches in this special 
locality would, I think, give the people of the district affected all the 
information necessary to protect themselves, and it would seem advisa- 
ble to send a number of copies of that bulletin to the postmasters at 
Garden City, Lakin, and Syracuse to distribute to farmers, who would 
make use of them, as well as to those whose names I will furnish for 
this purpose. 
OTHER SPECIES OBSERVED. 
The species next to differentialis that I should call most abundant in 
the injured fields was bivittatus; but taken alone its damage would 
have been iasignificant. Its habits are so nearly like those of differ- 
entialis that I see no occasion to give it further mention, and I have 
little doubt that any measures adopted against differentialis will prove 
as effective against this species. 
Still other species occurred, but seemed generally distributed, and so 
far as injury in the devastated fields is concerned need no mention. 
THE LONG-WINGED LOCUST. 
Dissosteira longipennis was taken in some numbers at all points vis- 
ited in Finney, Kearney, Hamilton, and Greeley Counties, and as this — 
species has caused so much injury in eastern Colorado this season, I 
took rather special pains to note ifs abundance and inquire as to any 
destruction resulting from it. At no point did it occur in destructive 
numbers, and I should not look for any injury from it in these localities 
in the near future at least. 
Most of those noticed were winged, some still fresh from the pupa 
Stage. In general all the winged ones, when disturbed, moved south- 
ward, but nothing like a general migration was seen. At Lakin I was 
told by a Mr. Logan that a large black-winged grasshopper had been 
common near that place, and when winged had traveled uniformly 
southward. 
PARASITES AND DISEASE. 
The many parasitized grasshoppers noted indicated a multiplication 
of such forms and these will undoubtedly accomplish much in reducing 
the numbers that van deposit eggs this fall, but I should deem it un- 
wise to depend on them and to omit the active measures already urged. 
The most general parasite was apparently the Tachina flies, as the 
great majority of dead hoppers were found to be completely devoured 
Within, and in most cases the opening through which the maggot had 
