THE CANADIAN ENTOMOLOGIST 119 



for hay. A U.S. forest ranger told me this morning that the first 

 damage he noticed from the larvae in the forest was the leaves that 

 were eaten from the Snow Brush, in many places the leaves being 

 entirely stripped, eaten off, — i.e. consumed. Yesterday I saw 

 many of these butterflies flitting among the branches and above 

 the tops of the tall pine trees. Sunday, the 20th, I saw millions 

 of these butterflies coming from the direction of the timber and 

 flying on in the direction of Goose Lake. In other words, they 

 were flying just about due west, and at the time there was quite 

 a stiff, constant north wind blowing. These butterflies seem 

 to congregate and alight on the willows, green-growing alfalfa, 

 and in wet, muddy places. At other times — at least, during the 

 day time — they are mostly on the wing. Now, the larvae haven't 

 done any remarkably great amount of damage yet, but there are 

 butterflies in sufficient numbers now to produce a crop of larvae 

 next year to entirely destroy all the vegetation that would be 

 produced here next year — i.e., if they are of the kind that comes 

 every year." 



Under date of June 12, 1912, Mr. Louis R. Webb, of Waldo, 

 Oregon, wrote us of the appearance there of these caterpillars 

 as follows: "There has appeared in this section of Josephine 

 County a sort of army worm that resembles somewhat the cater- 

 pillar, and different from anything I ever saw. It has attacked 

 the grease wood and mountain lilac mostly, and there are many 

 acres in this locality and South River County, Del Norte County, 

 Cal., that have been completely stripped of their foliage, and it has 

 begun to attack fruit trees. It builds no web like the army worm 

 of previous years, and its colour is black, with light streaks along 

 its back. The worm at present is about an inch long and about 

 one-eighth of an inch in diameter. So far, I have failed to find 

 the moth that deposits the eggs." 



"Also, under date of July 4, same year, specimens of the larvae 

 were submitted, and we quote from this letter as follows: "I 

 wish I could send you photos of vegetation destroyed by these 

 caterpillars. When they had eaten all the foliage off grease wood 

 and mountain lilac, they started a sort of exodus and took posses- 

 sion of everything — even our homes could not exclude them. 

 The streams and river were black with them, and tons of them 



