98 THE CANADIAN ENTOMOLOGIST. 



and it is notable that while the plant is abundant and flowers so profusely 

 as to whiten the landscape, the seeds have never been found. It grows 

 upon the dry hillsides and covers uncounted square miles of waste land. 



This plant, growing at a distance from the usual haunts of Piasus, is 

 that butterfly's food plant. While the flower buds are as yet but in their 

 merest infancy, the female Piasus of the first brood deposits her eggs, 

 ■ singly, on the bud and between it and the stem. The female of the 

 second brood finds the flowers in blossom. The egg is white, round, 

 flattened, with a depressed point in the center, like other Lycaena eggs. 



While Adenostoma is entirely foreign to any plant in the Atlantic 

 States or Europe, it is placed by botanists in the Order Rosacaea, and 

 among eastern plants those nearest it are : Alchemilla, "lady's mantle j" 

 Agrimona, " agrimona," and Poterium, "burnet," though all of these are 

 very unlike in appearance to Adenostoma. It is possible that the buds 

 or the immature seeds of other Rosaceous plants might feed Piasus larvae, 

 as cherry, plum, strawberry, etc. 



CORRESPONDENCE. 



WIND-VISITING MOTHS. 



Dear Sir: I have given in the Canadian Entomologist a pre- 

 liminary list of those moths which do not breed continuously in our 

 North American Territory, as defined by Leconte. It has been my 

 theory ^ stated in numerous papers within the past fifteen or twenty years, 

 that a number of species of moths, found as moths within our limits, are 

 wind visitors. I have been at some pains to point out that the Cotton 

 Worm Moth is, so far as the Central Cotton Belt is concerned and the 

 territory north of this, only a summer breeder, and that it is winter-killed 

 over the larger portion of our continent over which it flies. I ascertained, 

 while in the employ of the Agricultural Department, that, on the coast of 

 Georgia, the earlier or later appearance of the Cotton Worm depended, 

 at least in some seasons, upon the average direction and force of the 

 wind. No continued observations could be taken, but as the general 

 course of the wind is from south to north during the summer, what I 

 heard agreed with my previously published conclusions. My theory as 

 to the Cotton Worm has been ingeniously covered up in his Reports by 



