250 



THE MONTIILY BULLETIN. 



OUR MOST DESTRUCTIVE SPECIES. 



Melanoplus devastator. — This is a common, smnll species, and one of 

 the most destructive in the state. The general color is amber or 

 brownish. It is found princi- 

 pally in the San Joaquin and 

 Sacramento valleys. Frequent 

 migrations from the hills to the 

 valleys below take place. "While 

 in the hills the hoppers feed on 

 the pasture grasses, but when in 

 the valleys will attack any of the 

 cultivated crops. 



Melanoplus differentialis is a 

 large, yellowish-colored grass- 

 hopper about H inches in length, 

 and is one of the most destruc- 

 tive species in the alfalfa fields. 

 It has been present in great num- 

 bers throughout the central val- 

 leys of California. 



Melanoplus attains is yellowish 

 gray in color and about 1 inch 

 in length. It is more active in 

 Sight than M. differentialis and 

 is very destructive to alfalfa, 

 corn and grasses in general 

 throughout the southern counties 

 of the state. 



Melanoplus bUituratus is a 

 species in appearance very much 

 like M. atlanis, and is also very 

 destructive in the southern 

 counties, especially in the Im- 



pel'ial Valley. Melanoplus devastator. Slightly en- 



., 7 * 17 • 7 rm. j ii larged. (After Essig, lnj. and Ben. 



( amnula p< llurtda. the adults insects of Cai.) 



Fig. 66. — The differential grasshopper. Melanoplus differentialis. 



Natural size. (After Essig, lnj. and Ben. Insects of Cai.) 



