506 EXPERIMENT STATION RECORD. 



In cooperation witli Dr. J, A. Lintuer, State entomologist of New 

 York, and Jas. Fletcher, entomologist of Dominion of Canada, experi- 

 ments were carried on to ascertain the effect on bees of spraying trees 

 with Paris green while in bloom. The anthor conducted a series of 

 experiments, spraying plum, apple, and crab apple trees and raspberries, 

 with a solution of Paris green 4 oz, to 50 gal. of water. The trees were 

 sprayed while in full bloom and in some cases bees were colonized under 

 the trees, their escape being prevented by mosquito netting. Dead 

 bees were soon noticed, and when examined traces of arsenic were found 

 in them. It was also found in the contents of their abdomens, and there 

 is evidence that the sudden death of larv* was due to the introduction 

 of arsenic from without. The author thinks the proof conclusive that 

 spraying arsenites on trees while in bloom is injurious to bees in i^ro- 

 portion as the weather is favorable for their activity. The danger will 

 not be jiassed until all bloom has fallen from the trees. On this 

 account spraying should not be done while trees are still in bloom. 



Notes are given on the feeding habits of slugs [Limax campestris), in 

 which it appears they destroy many plant lice in greenhouses and 

 conservatories. 



Report on insect pests, A. Koebele {Hawaiian Planters'' Monthly^ 15 

 {1S90), i\^o. 12, pj). 590-598). — An important report submitted to the chair- 

 man of the committee on diseases and insect pests of the sugar cane. The 

 Hawaiian Islands are fortunate with regard to plant diseases and insect 

 pests of the sugar cane when compared with the Fiji Islands and cane- 

 growing regions in Australia. The cane borer [Splienopliorus ohseurus) 

 is the most injurious enemy of the sugar cane present in the Hawaiian 

 Islands. Its ravages exceed those of all other insects combined. Its 

 attacks seem confined to the moister localities. It is recommended to 

 burn the trash as soon as possible after the cane is cut, and trap the 

 mature beetles with pieces of split cane placed about 10 ft. apart in spots 

 most affected by the beetles. By this latter remedy enormous numbers 

 of beetles were collected by children in Fiji, who were compensated at 

 the rate of a small sum per pint. 



The larva of a Lamellicorn beetle {^J^gosoma rejiexum) has damaged 

 coffee trees by feeding upon the roots. Prolonged irrigation is recom- 

 mended as a remedy. The cocoa palms are injured by the destruction of 

 the leaves by the larva of a moth of the genus Botis. The same insect 

 also feeds upon sugar cane, banana, and other plants. Large numbers 

 of a parasitic hymenopteron [Chalcis ohscuraia) were introduced in 1895 

 from China and Japan. This parasite is said to have established itself 

 and to have done a great deal of good by destroying the Botis. The com- 

 mon grass worm of the southern United States {Laphygma frugiperda) 

 does considerable damage in Hawaii. It is also found in Brazil. A 

 species of mole cricket {Gryllotalpa sp.) has appeared in very large 

 numbers in some of the moist valleys on the island of Oahu. The 

 author thinks it an Asiatic introduction. It destroys seed cane. The 



