4 BULLETII^ 807, U. S. DEPAKTMENT OF AGRICULTURE. 



than 1888," from Alameda Comity. One other broker gives 1893 as 

 the first date infested beans were observed by him from the same lo- 

 cality. Mr. E. A. Bunl^er, from a personal transaction in 1898, posi- 

 tively remembers that date as the first year infested horse beans were 

 observed by him. Other dates for the different localities given by 

 different bean brokers are as follows: Gilroy, 1890; Watsonville, ■ 

 1900: Morro. 1900; Oceano, 1903; Half moon, 1904; and Sacramento, 

 1908. 



It must be remembered that in none of the above dates were the 

 weevils in horse beans identified as Bmchus ruflmanus^ but there is 

 little doubt that this is what they were. It is, therefore, quite evi- 

 dent that the insect was present in the different localities a number 

 of years before September, 1909. 



DISTRIBUTION IN CALIFORNIA. 



The principal broad-bean sections in California are around San 

 Francisco Bay and down along the coast to a little below San Luis 

 Obispo. The insect is distributed all over this, section, having been 

 taken or reported from the following counties : Sonoma, Napa, Yolo, 

 Sacramento, San Joaquin, San Mateo, Alameda, Santa Cruz, Santa 

 Clara, San Benito, Monterey, and San Luis Obispo (fig. 4). Broad 

 beans are grown in small quantities in many other counties, usually in 

 back yard gardens or in small plots for the green beans. Of late years, 

 in several counties, t^iey have been quite extensively planted as cover 

 crops, particularly in citrus orchards. Unless great care is exercised, 

 which is not often done, in planting uninfested or treated seed, it is 

 safe to say that the broad-bean weevil will be found wherever broad 

 beans are grown and allowed to come to maturity. The writer has 

 found eggs on the green pods of broad beans planted for cover crops 

 in Los Angeles, Orange, and Eiverside counties. Cover crops, how- 

 ever, are all plowed under before the weevil has had a chance to 

 develop. 



SPREAD IN CALIFORNIA. 



The broad-bean weevil probably became established in Alameda 

 County, where horse beans were first grown, about 1888. It next 

 appeared in Santa Clara County in 1890, and in Santa Cruz, Santa 

 Clara, and San Luis Obispo Counties in 1900. By 1904 it was 

 reported from San Mateo County; by 1911 from Sacramento and 

 Sonoma, by 1914 from Yolo and San Benito, by 1916 from San 

 Joaquin, and by 1917 from Napa. 



DISSEMINATION. 



Although the adult insect is an active creature and doubtless can 

 fly some little distance, from one field to another, or from where 

 beans may be stored to a near-by field, the principal method of dis- 



