33 
dant, the numerous eggs deposited in 1878 having developed still greater 
swarms. 
In 1S85, according to Bruner, it had become very numerous ill the 
Yellowstone and upper Missouri Valleys, having developed in numbers 
very rapidly in the preceding 5 years. In this year, in company with 
C. spretus and C. atlanis, it did the principal injury in this region to 
vegetables and grain, while the other native species attacked the grasses. 
Life-history and Habits. — This is the only North American locust 
of the subfamily to which it belongs {(Edipodinw) that is migratory. All 
the other locusts mentioned in this bulletin belong to another sub- 
family (AcHdiince). This locust is not a truly migratory species, as its 
swarms do not rise to a great height or remain long in the air, but has 
rather assumed the migratory habit in comparatively recent times. 
Eggs received from California hatched in large numbers the last of 
April and again in May. 
THE AMERICAN ACRIDIUM. 
(Schistocerca americana Scudd.) 
Range of Species. — This is much larger than any of the preceding 
species, being in fact our largest locust, often measuring more than 2^ 
inches in length. It occurs throughout the Southern States from the 
District of Columbia to Texas, and extends south through Mexico into 
Yucatan and Central America. It is also found as far north as Illinois 
and Indiana, and is doubtfully reported from New York. 
Fig. 11. — Schistuccrca americana — natural size (after Ililey). 
Destructive Appearances. — This species was very abundant in 
187G in Missouri, Tennessee, Indiana, Ohio, North Carolina, Georgia, and 
swarm seven reach Virginia. They caused much devastation, devouring 
in many places every green thing, even alighting on trees, and caused 
much alarm. They were supposed to be the Western species {spretus) 
advancing east. They })resent a more imposing appearance, from their 
great size, than the Kocky Mountain species, but can not cause such 
great destruction, as they are generally sedentary within the bounds of 
the United States, while to the south, in Yucatan and other parts of 
Central America, they are said to possess the true migratory habit. 
26787 --No. 25—-3 
