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2 . Foothill region — . rock pine and Douglas- f ir -- 
Elevation from 5,000 to 6,000 feet, approximately , with annual pre- 
cipitation of 15 to 20 inches. 
3. Low mountain — 6,000 to 7,500 feot 
4. High mountain — 8,000 to 8,500 feet 
5. Alpine — 10,500 to 12,200 feet 
Altogether, 3,257 specimens, including 58 species, were collected. 
The plains-grassland collection had the greatest number of species — 37; 
the foothill region had 40; the lower montane zone had 32; the higher montane 
zone, 14; and the alpine, only 5. The 5 most important species for each 
habitat are listed. 
The worst infestations in 1935 were in the north-central counties 
fringing the mountains, where succulent food was more abundant. In the more 
arid regions of the eastern counties severe drought, coupled with effective 
control campaigns, has greatly reduced the heavy populations that occurred 
in the severe outbreaks of 1930 and 1931. Melanoplus mexicanus §auss. was 
first in numbers over the whole area. M. bivittatus and M. differential! s 
have fallen off, owing to drought and lack of succulent food. 
