1917 ENTOMOLOGICAL SOCIETY. 109 



advanced than the second instar each larva spun about itself a little silken case or 

 hibemacula. I examined some of these hibernacula on August 26th, and found the 

 larvas still healthy and looking the same as wlien the cases were constructed. Some 

 of the hibernacula were on very small twigs and were situated alongside the 

 terminal bud; others on these same twigs were in the axil of the leaves, but attached 

 to the twig not to the leaf ; others were situated on larger brancbes in "various posi- 

 tions. The latter were usually al)Out the sliape of a bud scale and dark on the 

 outside, lined with white silk and easily mistaken for the hibernacula of the Bud 

 aMotli. The former were usually whitish in color, from 3 to 5 mm. long and about 

 I mm. in diameter. 



It is clear, however, that not all the larvja of this brood formed hibernacula, 

 because throughout most of August we found larvae, some a little more than half 

 grown, others full grown, and from these we reared adults. We also found adults 

 at Guelph, and at Grimsby, up to September 27th. To make sure there was no 

 mistake wc sent these to Mr. August Busck, who verified our determination. Un- 

 fortunately our having to shift our quarters from Grimsby to Guelph at the end 

 of August, prevented us from carrying the life-liistory through. Prof. Herrick, 

 however, states that there is no doubt that eggs are laid in the fall on the bark 

 and that these winter. 



Mr. A. G. Dustan, Annapolis Koyal, Nova Scotia, in the 1915 report of the 

 Nova Scotia Entom5logical Society, states that the insect in Nova Scotia winters 

 in the immature larval stage in hibernacula. He seems to imply that this is the 

 only stage in which it winters there. 



Red-necked Agrilus {Agrilus ruficoUis). 



A red raspberry plantation near Grimsby was much injured by the larvae of 

 this insect; the iivjury was much greater than I had ever seen before. Approximately 

 25 per cent, of all the canes were infested, and in consequence the crop was lessened 

 to about that extent. An examination of the new canes at the middle of August 

 showed that the injury next year would be as great as this year. Since the adults 

 do not emerge until long after the leaves are out, and since the tops of a large 

 percentage of the infested canes die before the adults leave them a very helpful 

 means of control would evidently be to go through the plot about a month after the 

 leaf buds burst and remove these canes, cutting them low down to be sure of not 

 missing any of the insects in them, and then burn all the cut canes promptly. The 

 tendency of this pest to localize itself was well shown by the fact that it was doing 

 very little injury in any of the surrounding plantations of the same or different 

 varieties. 



Apple Capsids on Mirids. 



Some further study of certain points about these Leaf-bugs has been made 

 and the following data obtained : 



1. Neurocolpus nuhilus, or the Clouded Leaf -bug as we may call it, has almost 

 disappeared from the large Norfolk apple orchard where it had been very abun- 

 dant for several years. On Jujy 9th in a half day spent in the orchard I saw only 

 15 of these. The disappearance was not due to lack of eggs for many of these 

 had been laid last summer. It may have been due to the very wet weather this 

 spring. 



2. In at least some of the orchards Lygidea mendux, the so-called False Red- 

 bug, was much less numerous than last vear. One of these orchards had been sprayed 



