14 THE BEAN THRIPS. 
found that the different stages in the Imperial Valley lacked the red 
markings except in the cooler weather of the late fall. 
ORIGIN AND DISTRIBUTION. 
This insect was first described by Mr. Theodore Pergande from 
specimens taken in Yuba County, Cal. A few years later he identi- 
fied a thrips from Lewiston, Idaho, as this same species. 
Mr. Dudley Moulton reported that this species had been collected 
in Colusa County by Mr. E. K. Carnes, in Santa Rosa County by 
Mr. O. E. Bremner, and in the Santa Cruz Mountains, Santa Clara 
County, by himself. Mr. D. L. Crawford recorded fasciatus from 
Santa Paula, Ventura County, Cal, and from Claremont and Chino, 
Cal. Mr. William B. Parker, of this bureau, collected it at Davis and 
Hamilton City, Cal. Mr. P. R. Jones, engaged in pear thrips in- 
vestigations, reports that this insect occurs very commonly around 
Lindsay and San Jose, Cal. Mr. S. W. Foster, while engaged in the 
same investigation, collected this insect from Martinez, Cal., and later 
found it " frequently throughout Contra Costa County." 
Mr. V. L. Wildermuth, engaged in cereal and forage insect in- 
vestigations, has collected this insect in California at Inclio, River- 
side County, and at Bard, El Centro, and Holtville, Imperial County, 
and in Arizona at Yuma, Yuma County, Buckeye and Tempe, Mari- 
copa County, and Sacaton, Pinal County. 
During the present investigation the writer has collected this insect 
quite extensively from many places in southern California. In 1910 
it was found to be very abundant on wild lettuce in several yards 
and alleys in the city of Los Angeles itself. At various times it 
has been collected from Bell, Compton, Gardena, Glendale, Holly- 
wood, Laurel Canyon, Puente, San Gabriel, Sierra Madre, Tropico, 
and Whittier, in Los Angeles County. In Laurel Canyon the author 
found it feeding on wild food plants in uncleared land about 6 miles 
from cultivated fields. It was also collected near the entrance of the 
canyon, scattered over the mountain sides on various wild plants. At 
Sierra Madre it was taken at an elevation of 750 feet. 
It was also collected at Garden Grove, Huntington Beach, Smelt- 
zer, and Sunset Beach, in Orange County, Cal. While on a trip in 
October, 1910, the author found this insect to be generally distributed 
throughout the town of Oxnarcl, and in Montalvo and the entire 
outlying sugar-beet district of Ventura County. 
In February. 1911, the author made a trip to San Diego to investi- 
gate the conditions in reference to truck crops there, and in Mission 
Valley — a long, narrow, and fertile valley lying to the north of San 
Diego, and devoted to truck crops — this insect was found feeding to 
some extent on pea vines. The writer left California for Washing-' 
ton, D. C, in September, 1911, and while delayed at Sparks, Nev., 
he examined several clumps of wild lettuce growing along the rail- 
