61 
does not seem to requireany food. It changes into a true pu- 
pa, and eventually into a winged beetle. Two species of blis- 
ter-beetles are shown on plate 5, fig. 36. 
OTHER ENEMIES OF LOCUSTS. 
A large number of carnivorous insects assist us in reducing 
the number of locusts, either by eating the locusts themselves 
or their eggs. Such beetles as ground-beetles devour a large 
number of the still young locusts, and if at all numerous, assist 
the farmer materially. Soldier-beetles and lightning-beetles, 
both as adult carnivorous insects and as larvze, also assist in 
this good work. Robber-flies carry off many of the smaller and 
frantically kicking hoppers; large and small digger-wasps store 
their nests with paralysed locusts, and even ants are said to 
eat not only the dead locusts but young and healthy ones as 
well. 
Many specimens of the peculiar hair-snake were found dur- 
ing August in wet places and along the rivers and creeks. 
These peculiar worms are well known to be internal parasites 
of insects, but chiefly of locusts. 
Birds are of course not slow in making good use of locusts as 
food for themselves and their young. Nearly every species of 
bird, even granivorous kinds,seem to enjoy a dish of fat and 
tender locusts. Some kinds of birds are especially fond of 
these insects and devour large numbers of them. 
Other animals also eat locusts, and the presence of that 
odoriferous animal, the skunk, was often perceived by the nose, 
but no especial efforts were made to actually watch the animal 
eating the insects. Shrews were numerous and actively at 
work eating locusts of all sizes, and even the otherwise des- 
tructive gophers were found to eat such insects. Of course 
toads, snakes and turtles are also fond of this food. 
POTATO BEETLES. 
THE COLORADO POTATO BEETLE. 
(Doryphora decemlineata, Say.) 
It is hardly necessary to introduce this insect to a Minnesota 
farmer who has ever grown potatoes. The illustration, which 
is given with this article, (Fig. 36, Plate 5,) shows the different 
