THE MORE DESTRUCTIVE LOCUSTS OF AMERICA 
NORTH OF MEXICO. 
If one were to describe or even to mention all of the locusts that are 
injurious to vegetation in this country every species would have to be 
included in such a list. Taken as a group then- are no exceptions to 
the general rule in this particular case. Every member of the family 
is a vegetable feeder, and hence is to be considered as harmful from the 
agricultural standpoint. As certain restrictions are absolutely ni 
sary in the preparation of this report, only a tew from among the many 
of these insects will be treated, and these briefly. Accordingly here- 
with is appended a list of the different locusts or grasshoppers that 
have been known to occur in destructive numbers within the limits of 
North America north of the Mexican boundary during the past twenty 
or thirty years, together with such other species as are liable to become 
destructive in the future. 
Every warm or temperate country of any extent of which a consider- 
able portion is arid or semidesert. or where the climate is liable to var- 
iation, has its locust swarms. Of all insect pests these swarms of lo- 
custs are generally most dreaded, because of their manner of attack 
and the rapidity with which they can and do lay waste a country or 
district. Other insect enemies may do an equal amount of injury dur- 
ing the year, but as it is not done '-right before our very eyes." we do 
not think so much of it. 
These destructive locusts may be divided into two classes with re- 
spect to their habits, viz, they are either migratory or they are non- 
migratory. When the former, they move about over the country from 
one region to another and drop upon us without much warning. When 
the latter, they simply multiply, do their injury, and remain where they 
are. Likewise, these destructive locusts may belong t«» either tin- one 
or the other of two subfamilies, i. >.. the (Edipodinse and the Acridiime. 
Here in Korth America most of the destructive species belong to the 
subfamily Acridiime. while in the Orient the reverse is probably the 
rule. 
The members Qfthe subfamily (Edipodinae are at once recognizable 
by their colored hind wings, the unarmed sternum of the prothorax, 
and in having the cushions between the daws of the tret very small. 
The Acridiime. on the other hand, usually have the hind wings trans- 
parent, the presternum always spined, and the feet provided with a 
rather large cushion between the claws. The members of the group 
CEdipodinaB are usually further recognizable, from the tact that they 
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