THE CITRUS WHITE FLY: DISTRIBUTION. 27 
Aside from the Gulf coast States, citrus fruits in the United States 
are grown only in California and Arizona. The citrus white fly does 
not occur in Arizona. In California the pest was first discovered in 
May, 1907. Mr. C. L. Maria tt has given the following account of 
the distribution of the white fly in that State in 1907 1 1 
Marysville is situated a few miles north of Sacramento, and the first infestation 
seemed limited to this town, but toward the end of the summer the white fly was 
discovered well established at Oroville, in Butte County, some 26 miles to the north 
of Marysville. The Marysville infestation was confined to the town and to yard trees 
or small garden orchards. Oroville lies in a considerable orange district, and the 
white fly had been carried from the town into several of the adjacent orchards and 
had become rather widely scattered. Shortly after the discovery of the fly at Marys- 
ville it was found also to have established itself locally near Bakersfield, 2 in the south- 
ern end of the San Joaquin Valley, and separated only by a mountain range from the 
citrus districts of southern California. 
In Foreign Countries. 
For years the citrus white fly has been supposed to be an intro- 
duced species, and much interest has been attached to its occurrence 
elsewhere than in North America. Prof. H. A. Gossard in 1903 
stated that Mr. Alexander Craw, of the California State commission 
of horticulture, had received this species on plants from Chile, where 
it was reported to be a great pest. Mr. G. W. Kirkaldy, in his cata- 
logue of the Aleyrodidse, in 1907, gives "Mexico, Brazil, and Chile 
(?)" as the known habitats of the citrus white fly outside of the 
United States. The writers are informed by Prof. A. L. Quaintance 
that he was told in person by the late Prof. Rivera, of Santiago, 
Chile, that the citrus white fly was abundant in that country. Prof. 
Carlos Camacho, chief vegetable pathologist at Santiago, Chile, is 
also, according to Prof. Quaintance, authority for the statement that 
it occurs there. 
The Bureau of Entomology received, in 1906, specimens of an 
aleyrodid on orange leaves from China which Prof. Quaintance 
determined as Aleyrodes citri, 3 and still more recently it received, 
through Mr. August Mayer, in charge of plant-introduction garden, 
and through the California state commission of horticulture, speci- 
mens of orange leaves infested with what Prof. Quaintance has 
identified as this species from different parts of China and Japan. 
The occurrence of the citrus white fly in India (northwestern Hima- 
layas) has recently been established by Prof. Quaintance, who has 
compared MaskelTs A. aurantii, collected in the region mentioned 
1 Proceedings of the Entomological Society of Washington, vol. 9, pp. 121-122, 
1908. 
2 Specimens of the species present at Bakersfield were examined by the senior 
author at the California State Insectary at Sacramento and found to be the cloudy- 
winged white fly (A. nubifera). 
3 Proceedings of the Entomological Society of Washington, vol. 8, Nos. 3-4, p. 107. 
