4 MISCELLANEOUS PUBLICATION 1348, U.S. DEPARTMENT OF AGRICULTURE 
COASTAL 
Camnula pellucida (Scudder) 
Cordillacris spp. 
Dissosteira spurcata (Saussure) 
Melanoplus devastator Scudder 
Oedaleonotus enigma (Scudder) 
Trimerotropis pallidipennis (Burmeister) 
INTERMOUNTAIN 
Ageneotettix deorum (Scudder) 
Amphitornus coloradus (Thomas) 
Aulocara elliotti Thomas 
Boopedon nubilum (Say) 
Camnula pellucida (Scudder) 
Cordillacris spp 
Dissosteira spurcata (Saussure) 
Drepanopterna femoratum (Scudder) 
Encoptolophus sordidus costalis (Scudder) 
Melanoplus foedus (Scudder) 
Melanoplus sanguinipes (F.) 
Oedaleonotus enigma (Scudder) 
Trachyrhachis kiowa (Thomas) 
GREAT PLAINS 
Aeropedellus clavatus (Thomas) 
Ageneotettix deorum (Scudder) 
Amphitornus coloradus (Thomas) 
Aulocara elliotti Thomas 
Boopedon nubilum (Say) 
Camnula pellucida (Scudder) 
Chorthippus curtipennis (Harris) 
Cordillacris spp. 
Drepanopterna femoratum (Scudder) 
Encoptolophus sordidus costalis (Scudder) 
Eritettix simplex (Scudder) 
Melanoplus infantilis Scudder 
Melanoplus packardii Scudder 
Melanoplus sanquinipes (F.) 
Mermiriaspp. 
Morseiella flaviventris (Bruner) 
Opeia obscura (Thomas) 
Phlibostroma quadrimaculatum (Thomas) 
Phoetaliotes nebrascensis (Thomas) 
Psoloessa spp. 
Trachyrhachis kiowa (Thomas) 
Trimerotropis pallidipennis (Burmeister) 
FIGURE 1.—Destructive grasshopper species of the Western United States shown according to geographical area in which they 
are most damaging. Their actual distribution may be much greater. 
most of the important species as determined by 
some of the more comprehensive feeding studies. 
Other workers have studied the preferred food 
plants of individual species. Pfadt (1949c) studied 
the importance of food plants in the ecology of 
Melanoplus sanguinipes in Wyoming, and Rogers 
(1974) gave a dietary analysis of this grasshopper 
within a cheatgrass community in Washington. 
Pfadt (1949a) also reported on the preferred food 
plants of Aulocara elliotti in Wyoming. The food 
preferences of Dissosteira spurcata in California 
were given by Kelly and Middlekauff (1961). Eco- 
nomic data on Melanoplus devastator, the most de- 
structive grasshopper in California, were reported 
on by Harper (1952) and Middlekauff (1958). 
Another variable that must be considered is the 
composition of grasshopper diets from hatching to 
adults. Plant preferences expressed by adults may 
be different during nymphal development. These 
preferences may be due to different plants becom- 
ing available as the season progresses or other fac- 
tors. A number of workers have studied this prob- 
lem. In Kansas, both Lambley (1967) and Campbell 
(1967) found no significant changes in food plant 
preferences during the various stages of develop- 
ment of the species studied. However, Campbell 
mentioned that some species fed to a considerable 
degree upon Bromus japonicus Thunb. and Poa 
pratensis L. as first to third instars and seldom at 
all in later stages of their life cycle. 
Alexander and Hilliard (1964) studied alpine pop- 
ulations of Aeropedellus clavatus. Their crop analy- 
sis indicated that the immature stages showed 
more variability in feeding than do adults, but all 
