408 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 15 



Foothills of Sierra Nevada Mountains. — An investigation was 

 also conducted on the western foothills of the Sierra Nevada Mountains 

 bordering the eastern side of the Sacramento Valley. The foothills are 

 often rolling or merely imdulating and the timbered region is soon 

 reached after leaving the valley slopes. Red Stem Filaree is not abun- 

 dant on the hills. The beet leafhoppers were not taken on the western 

 foothills of the Sierra Nevada Mountains bounding the Sacramento 

 Valley and there were no indications on this side of typical Eutettix 

 foothill breeding groimds. The location of the Sierra Nevada foot- 

 hills from north to south with reference to distances and directions of the 

 nearest towns follows: 



7 miles northeast of Red Bluff. 

 10 miles east of Chico. 

 Vicinity of Oroville. 

 12 miles east of Marysville. 

 Vicinity of Newcastle. 

 Vicinity of lone. 

 VI. Favorable Breeping Plants of Beet Leafhopper in 



Cultivated Area 

 In the cultivated area of the Sacramento Valley the most favorable 

 breeding plants such as the saltbushes are scarce, except in the southern 

 part of the valley. The beet leafhopper has been bred from the follow- 

 ing species of the family Chenopodiaceae, to which the sugar beet be- 

 longs : 



Table 2. Species of Chenopodiaceae from Which Beet Leafhopper 



HAS BEEN bred 



Annual Saltbushes 



1. Silverscale or Fog Weed (A triplex expansa). Native. 



2. Bractscale {A triplex bracteosa). Native. 



3. Redscale or Red Orache (A triplex rosea). Introduced from Europe. 



4. Crownscale (A triplex coronata). Restricted to California. 



5. Heartscale (A triplex cordulata). Restricted to California. 



6. Atriplex parishi. Restricted to California. 



7. Spearscale {Atriplex patula). Native. The beet leafhopper has not been bred 



from this saltbush. 



Perennial Saltbushes 



8. Atriplex fruticulosa. Restricted to Sacramento and San Joaquin Valleys. 



Pigweeds 



9. Pigweed or Lamb's Quarters (Chenopodium album). Common European weed. 



10. Nettle Leaf Goosefoot {Chenopodium murale). Naturalized from Europe. 



11. Mexican Tea {Chenopodium ambrosioides) . Naturalized from tropical America. 



Weeds 



12. Russian Thistle {Salsola kali tenuifolia). Introduced from Asia. 



13. Nitrophila occidentalis. Native. 



