On the 13th of July, 1881, I saw a female L. macer busily engaged in gnawing holes in the stem of a green Helianthus grosse-serratus (Wild Sunflower). There were several holes in the stem of this plant, and in each I found one or two eggs, of an elliptic-ovoid form, polished pale yellow, and measuring about two and one-fourth mm. in length. In the stems of other similar weeds, which grew near to this one, I found several recently hatched larvæ. I examined the stems of this same kind of weed at intervals throughout the summer season, and found the larvæ in different stages of their growth, sometimes two or three in the same plant. Late in October I noticed that many of these weeds had been broken off, and the pieces—from one and a half to three feet in length—were lying about upon the ground. These pieces contained a larva—evidently of the above species—and at one end, and occasionally at each end, the pith and woody part had been gnawed away, leaving nothing but the bark, and this had evidently been broken off by the wind. I examined a few of these pieces on the 25th of the following April, and found nothing but larvæ another examination was made on the 12th of the following month, when nothing but larvæ were found, but all were dead.