No CrossRef data available.
Published online by Cambridge University Press: 31 May 2012
During the summer of 1882 a few of the ash trees on the college lawn became infested with a Saw-fly worm which for a few days threatened to be quite serious. I made a few trials of London purple on the trees most seriously infested, but before I had gained results from many trees or had completed a study of the larvæ, they suddenly disappeared. So far as my experiments went they showed the London Purple to be a successful remedy and as applicable to these worms as to any of the Saw-Fly group. No adults were observed, and none of the larvæ I had under my observation matured; so the matter necessarily came to a rest.
page 149 note * In order to be certain that my determination of the species was correct, I sent specimens to Mr. E. T. Cresson, of Philadelphia, and he has kindly compared them with the specimens in the collection of the Am. Ent. Soc., and pronounces them identical, except a slight difference in size.