64 
have been insignificant. Its habits are so nearly like those of differ- 
entiaUs that I see no occasion to give it farther mention, and I have 
little doubt that any measures adopted against differ entialis will prove 
as effective against this species. 
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 its 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. 
PARASITES AND DISEASES. 
The many parasitized grasshoppers noted indicated a multiplication 
of such forms, and these will undoubtedly accomplish much in reducing 
the numbers that can 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 parasites were apparently the Tachina flies, as the 
great majority of dead hoppers were found to be completely devoured 
within. 
Some of the dead grasshoppers had the appearance of having been 
affected with Entomoyhthora, and I gathered a number in order to make 
an effort to cultivate the disease, but as yet have nothing to report in 
this line. The dead hoppers will be kept with living ones, and if the 
latter take the disease we may hope to still farther multiply the dis- 
ease by inoculating still others, and then an effort can be made to dis- 
tribute the disease in the fields. Its spread, however, is evidently 
slow, and I do not think other measures should be neglected this season 
for a plan which is still uncertain. 
Among the natural enemies observed, toads were perhaps the most 
common, some of the fields containing great numbers of them, espe- 
cially of half-grown individuals, and these would seem capable of greatly 
reducing the number of hoppers. A dead one, which saved me the 
necessity of making a dissection to get positive proof, showed in the 
partly decomposed stomach the legs and other parts of grasshoppers, 
proving that, as would be inferred from presence of toads in the fields, 
their mission was to feed upon the grasshoppers. 
The attacks of skunks upon grasshoppers, as stated by Mr. Long- 
streth, have already been mentioned. 
As the tendency is for natural enemies to multiply with the increase 
of any species of insect, we may look for increased assistance from this 
source by another year, and in connection with the measures already 
urged, these ought by another year to keep the insect entirely within 
the limits of destructiveness. 
