THE CANADIAN ENTOMOLOGIST 23^^ 



green ones largely in the majority, although the black ones were 

 by no means scarce. Handpicking of the caterpillars and shaking 

 of the infested plants supplemented by "swatting" the moths at 

 night with the ordinary wire "fly swatters" gave the best results. 

 Light traps and stale beer and molasses attracted only a few 

 moths. Paris green and hellebore burned the foliage as did 

 arsenate of lead to a slight extent. The chief objection to 

 arsenate of lead was the discolouration of the foliage, which 

 followed its use. Poisoned bran and molasses was not successful, 

 as the larvae preferred the ferns. A detailed account ot this insect 

 can be found in Bull. 125, Bur. Ent. U.S. Dept. Agric, by F. H. 

 Chittenden, and in the 27th Report of the State Entomologist of 

 Illinois which contains an article by J. J. Davis. Inasmuch as 

 neither of these publications mentions the hatching period of the 

 egg, I might say that eggs under my observation hatched in from 

 five to seven days. Considering the fact that it is a troublesome 

 species once it gains a foothold in the fern house, it would pay 

 fern growers to be on the watch for it when receiving plants from 

 other establishments. It can be readily transported in the egg, 

 larval and pupal stages. 



Harry B. Weiss, New Brunswick, N.J. 



Priophoriis acericaiilis MacG. in Neiv Jersey. This saw-fly 

 known as the Maple Leaf-Stem Borer is listed in Insects of New 

 Jersey as being very local and recorded from South Orange. 

 During May and June, 1914, it was found injuring maple trees on 

 the property of Mr. T. Romaine, Hackensack, N.J. The leaves 

 started to drop about May 20th, and in a few days the ground 

 beneath the infested trees was covered. Mr. Romaine had 

 observed this unusual pest for the past four years and during that 

 time it had not spread at all to adjoining maples. An account of 

 its life history by Dr. W. E. Britton can be found in Ent. News, 

 vol. 17, Nov., 1908, and acting on the suggestion contained therein, 

 kerosene emulsion at the rate of one to twelve was applied twice to 

 the ground beneath the trees while the larvae were entering. It is 

 somewhat unusual to run across the work of this insect which is 

 not by an3' means common. 



Harry B. Weiss, New Brunswick, N.J. 



