satumia mendocino is another very desirable thing which should be very easily 

 bred, if one could find it. As far as I know, there has been none of them 

 turned up for twenty-five or thirty years. But that is probably because no one 

 has collected in the right locality. I think it is found north of San Francisco, 

 in Mendocino County. Around Soda Springs, Shasta County, ought to be 

 good collecting. It is one of Henry Edwards' old resorts. I am anxious 

 to get things from the Kern River country, the Shasta country, Yosemite region, 

 also down in the Owen's Lake region. Northeastern California is practically 

 unworked as far as I know. If one could find a good locality there, not all 

 desert, he ought to get lots of good things. There has been very little col- 

 lecting done in Nevada at any time except more or less around Verdi, Reno and 

 Virginia City. A trip down through Virginia City, Goldfield and Owen's Lake 

 ought to bring valuable results if one struck things just right." 



FEEDING LEAVES OF IDENTICAL TREE. 



When you discover larvae upon a tree or shrub they will in most cases 

 thrive better upon the leaves of that same tree or shrub than though you 

 substitute leaves of the same kind. If this is not practicable, try at least to 

 obtain leaves from trees or shrubs growing in the particular locality in which the 

 larvae were found. This rule is not imperative, and in rearing large numbers of 

 larvae I pay no attention to it whatever. With a particularly rare species feed 

 larvae the leaves of the same plant upon which they were found. 



PENNSYLVANIA LEPIDOPTERA. 



Dr. Holland writes: "The butterflies of western Pennsylvania are com- 

 paratively few in number, there being only about seventy-five species which 

 occur here. It is not so with the moths. We must have sixteen hundred 

 species of moths in this county, and taking western Pennsylvania as a whole, 

 I have no doubt the number will ultimately be found to reach well above 

 the figure." 



PRESERVING LARWE. 



Dr. J. H. McDunnough of Decatur, 111., writes: "I would suggest 

 taking fully fed larvae just as they commence to contract before pupation and 

 placing them for ten minutes in a solution of 6 parts absolute alcohol, 3 parts 

 chloroform and 1 part glacial acetic acid, then transferring to 80 or 90 per 

 cent alcohol which contains a solution of chlorophill (this latter you can get 

 by crushing leaves in alcohol), this prevents the green color being extracted 

 from the larvae; place in small vials. We should very much like larvae of any- 

 thing you breed." 



INCREASING STRENGTH OF CYANIDE BOTTLE— CAUTION. 



Alternate layers of cyanide and blotting paper will permit any desired 

 strength of the poison bottle. The addition of Tartaric Acid adds very 

 much to the strength of the poison fumes, for it causes the deadly salt to de- 

 compose, resulting in the liberation of hydrocyanic acid. In the use of any 

 form of traps this becomes of importance. Poison labels should be pasted 

 upon each bottle and the greatest possible care should be taken to remove the 

 bottles early in the morning and place them in position late in the evening, 

 using every precaution to place them in safe and secluded places out of the 



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