ENTOMOLOGY. 97 1 



25 per cont niixturo of korosoiie and water. The majority of the lice 

 were killed, but the author docs not coutsidcr this method as capable 

 of practical use on a large scale. He believes that the destructive pea 

 louse is a well-known insect, described under the name Nectarophoi'a 



pix'i. 



Supplement to my article on "American fruit and its parasites," 



C. Bkick {Bot. Mux., Alt. J>tf(mzL)hschuts, Ilamhunj, 2 {1S99-1900), 

 pj). 10). — In this article the author gives an account of the amount of 

 fresh and dried American fruit received in Hamburg, and indicates 

 the percentage of such fruit infested by various scales and fungus 

 diseases. The San Jose scale was found infesting 3.12 per cent of 

 82,802 packages of fruit. Of the apples which came from the eastern 

 part of the l^nited States, 1.84 per cent were infested, while the Cali- 

 fornia apples showed an infestation of 42.44 per cent and the Oregon 

 apples 51.44 per cent. In infested packages the lowest infestation 

 was 1 per cent, while in many cases almost every apple in the package 

 was infested with the scale. In 23 shipments from Eastern States 

 which were infested with the San Jose scale, Asjndiotus forbesi and 

 the scurfy scale were also found. 



As bearing upon the question of the origin of the San Jose scale 

 the author reports that this insect was found upon the following, 

 species of living plants imported directly from Japan, viz: Pnuius 

 mume^ P. muine pendula, P. pendula^ P. jpersica,, P. p^^eudo-cerasu^^ 

 P. ce/ri^i/s, Cifrm trifoliata^ and SaJir multinerms. On some of these 

 plants San Jose scale was found in all of its stages. Among the other 

 insect parasites and fungus diseases which were found on the American 

 fruit the following may be mentioned: Forbes scale, scurf}' scale, 

 03'ster-shell l^ark-louse, AxpUliotus ancylu-'^., A. camelUm^ Gyiiinoapo- 

 rangium macroptis^ and Capiiodiuin saUcimum. 



The San Jose scale was found on 20 crates of pears from California. 

 In shipments of dried fruit the San Jose scale was found infesting 

 3,052 crates of pears and 50 crates of nectarines. Besides other species 

 of scales already mentioned. Pla.^pJx falla.r was found on apricots. 



Crude petroleum v. the San Jose or pernicious scale, J. B. 

 Smith (iVW Jersey Stas. Bid. llfB^ pp. W). — In this bulletin the author 

 summarizes the general results of his experiments w4th crude petroleum 

 as an insecticide against the San Jose scale since 1897. More than 

 50,000 fruit trees of different kinds have been sprayed with crude 

 petroleum under the direction of the author or have been subsequently 

 inspected by him. In investigating the cause of damage to trees from 

 crude petroleum in the hands of certain experimenters, the author 

 found that the name crude petroleum had no detinite meaning and 

 included a number of oils of very different specific gravity. The one 

 with which the author's experiments were conducted had a specific 

 gravity of 43 per cent and was of a dark green color. Some inter- 



