h*20 EXPERIMENT STATION RECORD. 



street trees in Connecticut cities. Some badly infested trees began to drop their 

 leaves in July. Two small trees and one medium-sized tree were sprayed August 4 

 with the ordinary kerosene emulsion diluted nine times. Results were unsatisfactory, 

 few of the insects being killed. Some trees were sprayed again August 17 with 

 kerosene emulsion made with a soft naptha soap and diluted five times, with satis- 

 factory results. 



The same speaker gave the results of Tests of Lime-Sulphur Washes in Connecti- 

 cut in 1905. In this work 6,000 peach, pear, and apple trees were sprayed in March 

 and April, 1905, with lime-sulphur washes prepared according to 5 different formu- 

 las, and with the kerosene-limoid mixture, containing 25 per cent of kerosene. The 

 lime-sulphur washes gave more satisfactory results than the limoid mixture and 

 were less expensive- No advantage could be detected by adding salt to the boiled 

 wash. The self-boiled wash, containing 20 lbs. lime, 10 lbs. sulphur, 10 lbs. sodium 

 sulphid, and 40 gal. water, was fully as effective as any of the boiled mixtures. 



Grain Fumigation with Hydrocyanic Acid was the subject of a paper by H. E. 

 Summers. He reported that in the fumigation of a seed warehouse of 300,000 cu. ft. 

 capacity, 1 oz. of cyanid per 100 cu. ft. was used. The house was subjected to fumes 

 of this strength over night, but it proved ineffective against Calandra granaria in the 

 middle of bags of grain. 



Another paper along similar lines was presented by C. L. Marlatt on The Use of 

 Sulphur Dioxid as an Insecticide. He described an apparatus by means of which 

 sulphur dioxid could be forced into buildings, and its penetrating power thus increased 

 over the simple burning of sulphur in the building. Sulphur dioxid is considered 

 cheaper than hydrocyanic-acid gas, less dangerous to use, more effective as an insec- 

 ticide, and possessing a greater penetrating power when acting on like exposed areas. 

 A small quantity of gas acting for a long time appears to have greater insecticidal 

 value than a large quantity acting for a shorter period. It is believed that the gas 

 will prove especially useful as an insecticide on shipboard. 



Wilmon Newell gave the results of some observations upon a little-known insect 

 enemy of cotton and corn ( Cicada nigriventris). This insect did considerable injury 

 to cotton on bottom lands in the Ouachita Valley during the past season. It is con- 

 trolled by cultural methods. 



A paper was presented by C. E. Sanborn on The Relation of Descriptions to Eco- 

 nomical Methods of Eradication in the Family of Aphidida?, in which he called 

 attention to the faulty descriptions of the different species of these insects. 



A. W. Morrill presented Some Observations on the Spined Soldier Bug (Podisus 

 maculiventris) , in which descriptive notes were given and data as to variation in male 

 and female, the number of eggs laid by the female, percentage which hatched, etc. 



Entomological notes for the year from Texas were presented by A. F. Conradi; 

 from Cuba, by M. T. Cook; from New York, by E. P. Felt; from Ohio, by A. F. 

 Burgess; from New Hampshire, by E. D. Sanderson; from Georgia, by R. I. Smith 

 and A. C. Lewis; from Maryland, by T. B. Symons; and from Minnesota, by F. L. 

 Washburn. 



Other papers presented before the society were as follows: The Problem of Wing 

 Origin and Its Significance in Insect Phylogeny, by H. Osborn; Preliminary Observa- 

 tions on the Variation of Utetheisa venusta, by M. T. Cook; Observations upon the 

 Migrating, Feeding, and Nesting of the Fall Webworm (Hyphantria cunea), by E. W. 

 Berger; The Care of Entomological Types, by T. D. A. Cockerell; History of Eco- 

 nomic Entomology in Hawaii, by J. Kotinsky; The More Important Economic 

 Aleyrodida? and The Life History and Habits of Tisheria maiifolieUa, by A. L. Quaint- 

 ance; and Notes and Experiments with Insecticides, by E. P. Felt, S. A. Forbes, 

 and A. F. Burgess. 



A committee of five was appointed to confer with the Bureau of Entomology to 

 devise a plan to bring about uniform rules for nursery inspection and to cooperate 



