4 BULLETIN 344, U. S. DEPARTMENT OF AGRICULTURE. 



weevil was studied in detail throughout the range. In this range the 

 Thurberia plant was found, scatteringly but very generally, at alti- 

 tudes ranging from about 2,600 to 7,000 feet. The writer, working 



Fig. 1.— Map of Arizona showing mountain ranges representing the habitat of the Arizona wild cotton 

 weevil (Anlhonomus grandis tliurberiae) and its food plant ( Thurberia thespesioides) . (Original.) 



along the southern and southwestern slopes from the divide at the 

 eastern end to the western tip of the range, practically circled the 

 range. From the western tip of the range trips were made around 

 the western end into the northwestern slopes at Montrose and Romero 



