83 



at a distance from towns, or for the sake of economy, generally buy 

 more materials at once than they require to use at the time. No mat- 

 ter how great the danger may be, people soon get careless. 



Mr. Marlatt desired to know what objections there would be to the 

 use of the simple copper arsenite as a substitute for Paris green. 



Mr. Fletcher stated that he preferred the former to Paris green in 

 some ways, not only on account of its being cheaper, but from the 

 fact that it was susceptible of much more even distribution in the 

 water, but it seemed also more likely to injure foliage. He had used 

 disparene with great satisfaction. 



Referring to the danger of poisoning fowls by poison bait scattered 

 in the held, .Mr. Wilcox stated that about a year ago he had had occa- 

 sion to read an extended article bearing directly upon this point. 

 Several forms of arsenical poisons had been tried on chickens and 

 pigeons, and also, as be remembered it. on ducks. The details of the 

 test had passed from his mind, but he was greatly impressed with the 

 very large quantity of poison which fowls could eat before they were 

 affected by it. 



Mr. Fernald called attention to an interesting observation which he 

 had made in the course of his nursery-inspection work in Massachu- 

 setts, namely, that he had found the San Jose scale occurring on the 

 arbor vita? and also on the white spruce. While he hardly thought 

 that the insects would be able to permanently establish themselves on 

 these plants, yet he desired to call attention to the matter. 



Mr. Kellogg then presented the following paper: 



NOTES ON CALIFORNIA C0CCID.E, ALETJRODIDJE, AND SCOLYTID.E. 



By V. L. Kellogg, Palo Alio. Col. 



Mr. Kellogg made a brief report on the work being done at Leland 

 Stanford Junior University on the Coccidse, Aleurodida 1 . and Scolytidae 

 of California. A collecting trip was made in the summer of 1901, by 

 foot and horseback, for a thousand miles through the great coniferous 

 forests of northern California for the purpose of collecting specimens 

 and notes for a study of the conifer-infesting scale insects. Mr. Cole- 

 mam the assistant who undertook this trip, brought back 22 species of 

 Coccida? from 26 species of conifers, in of the insect species being 

 described as new. Of these lo the immature stages o( 4 are described 

 and a complete life history of 1. A graduate student. Mrs. F. E. 

 Dorsey, has described 20new species of Aleurodidse found in California, 

 thus increasing the number of know n North American species in this 

 family from 4<> to 60. In the case o^i every one oi these 20 new species 

 the immature stages have been studied by Mrs. Dorsey and described. 

 Experiments have been carried on in combating Dendroctonw miens 

 m Monterey pines in the arboretum of Stanford University, in the 



