100 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



sioned by locusts in California, and has also been found in New 

 England, but is not noted there as especially destructive. 



Our largest winged American Locust, the American Acridium 

 (Schistocerca americana Scud.), is practically confined to the 

 Southern States from the District of Columbia to Texas, and 

 thence south through Mexico and Central America, being rarely 

 found in the North. This species is essentially a tropical one, 

 and has often been exceedingly destructive, being especially so 

 in 1876 in Missouri, Tennessee North Carolina, Georgia, and 

 southern Ohio. 



Considerably larger than the preceding species are the Dif- 

 ferential Locust (Melanoplus differentiates Thos.) and the TWO- 



FIG. 77. The American acridium (Schistocerca americana Scud.). (After 



Riley.) 



striped Locust (Melanoplus bivittatus Scud.), of which the former 

 is peculiar to the central states of the Mississippi Valley, Texas, 

 New Mexico, and California, while the latter has a more extended 

 range from Maine to Utah and as far south as Carolina and 

 Texas. These two differ from the smaller species in laying 



only one or two masses of 

 eggs, and the eggs of dif- 

 ferentiates have often been 

 found placed under the bark 

 of logs, but otherwise their 

 habits are very similar. 

 FIG. 78. The Two-striped locust (Mela- The two-striped locust is 

 noplus Uvittatus Scud.). (After Riley. characterized by two yel- 

 lowish stripes extending from the eyes along the sides of the 

 head and thorax to the extremities of the wing-covers, and is 

 probably the species most commonly observed by the farmer. 



