ENTOMOLOGY. 269 



burn the foliage of potato vines when used without lime in the strength 

 of 1 lb. to 150 gals, of water. Experiments show further, although the 

 author does not conclude that Sheele's green is as effective as Paris 

 green, that it has a very considerable insecticidal value. Experiments 

 were made on basket willows, nursery stock, and potatoes, the solu- 

 tions varying in strength from 1 lb. to 100 to 150 gal. of water. 



Experiments with dendrolene (pp. 540-542). — Several experiments 

 were made with this substance with the object ot ascertaining whether 

 trees are apt to be injured by its use and how it is to be used. It was 

 applied to the trunks of trees in rings both high and above the ground 

 and also at the base of the tree in both thick and thin layers. Where 

 it came in contact with the soil it was found that it became granular, 

 losing its sticky character to a large extent. When exposed to the 

 weather a slight crust forms over it, which is not, however, sufficiently 

 strong to permit the passage of insects as large as the female canker- 

 worm moth. When applied to full grown apple trees no injury resulted, 

 but when applied during the growing season to the trunks of young 

 bearing plum, cherry, or peach trees in such a way as to cover the 

 entire trunk there is considerable danger of serious injury. 



Combating the cottoiuvood leaf beetle (pp. 543, 544). — Experiments were 

 made with green arsenite at the rate of 1 lb. to 150 gal. water, with 

 and without the addition of lime, at the rate of 2 qt. to 45 gal., and 

 with and without the addition of glue and of glucose, it was demon- 

 strated that one of the most serious difficulties in the application of 

 poisons to willows for this beetle lies in the fact that the mixture does 

 not spread well on the willow leaf. Arsenite of lead did not adhere 

 well, nor did an addition of glucose aid matters much. An addition of 

 glue was more successful. 



The pistol- case bearer (pp. 545-557, pis. 3). — A reprint of Bulletin 122 

 of the- station (E. S. E., 9, p. 257). 



A brief report of nursery stock inspection in western New York (p. 

 558). — Here it is noted that between 15,000 and 20,000 trees were 

 inspected, about 3,000 of which were found infested with insects, mostly 

 either by the peach-tree borer or the woolly aphis. Over 1,000 trees 

 were rejected as worthless; the remainder were treated with insecti- 

 cides. Each tree was carefully examined from the root to the top and 

 only such as showed no evidence of insect work or disease were con- 

 sidered satisfactory. In addition to the insects noted there were found 

 the oyster-shell bark louse, the scurfy bark louse, Asterodiaspis quer- 

 cicola, and the pear-tree psylla. 



The peach-tree borer (pp. 559-569, pis. 2). — An historical account of 

 this insect {Sannina exitiosa), its distribution, the nature of its injury, 

 its life history, and preventive and remedial measures, together with a 

 partial bibliography. 



The tcoolly louse of the apple (Schizoneura lanigera) (pp. 570-582, 

 pis. 3). — The account giveu of this insect is similar in scope to the 



