gas. As might be expected, the latter remedy proved fatal to the 

 insects. Not a living one could be lound after the treatment, which 

 was continued but a few moments. 



The results from kerosene emulsion and whale oil soap were very 

 similar, with fihose from kerosene emulsion possibly the more favorable. 

 From sixty per cent, to eighty per cent, of the lice were estimated as 

 killed by these washes with one application. The branches treated 

 bore many cratks and protecting scales of bark, and the lice surviving 

 the treatment seemed in all cases to be those that had shared the pro- 

 tection of these places in the bark. 



SUMMARY. 



r , The smooth-bark elms seem to be more subject to serious attack 

 than the cork bark elms, owing to the protection afforded the latter by 

 the plates of cork on the branches. 



2. The possible present confinement of the disease to the vicinity of 

 Carson City warrants active and thorough measures to eradicate the 

 pest and prevent its spread to other parts of the State. 



3. The danger of getting young nursery stock at Carson City is 

 evident. 



4. Judging from the history of the insect in America, it is not likely 

 to attack trees other than the elm. 



5. Kerosene emulsion and whale-oil soap seem to be effectual reme- 

 dies when the insects] are reached by them. Spraying will probably 

 have to be done at different periods and may be found to be most 

 eflfectual when the insects are most active. 



6. The fumes of hydro-cyanic acid gas effectually destroy the lice, 

 but the use of the remedy necessitates the employment of a tent to 

 cover the tree and confine the gas sufficiently long to kill the insects. 



7. A careful study of the insect's habits, extending through an 

 entire year at least, will be necessary to determine the most vulnerable 

 period in the insect's life-history. 



November 12, 1895. 



