1904 ENTOMOLOGICAL SOCIETY. 109 



day Harvest fly (Cicada) in miniature (Fig. 60). During the winter it se- 

 cures shelter in the crevices of the bark on the trunks and large limbs of the 

 trees, is nearby rubbish, or wherever it can find protection ; hence the advan- 

 tage of clean culture, in which case it will be confined to the trees. The 

 small lemon-coloured eggs are laid about the middle of April, and hatch about 

 tlie middle of May, according to weather conditions (Figure (jl). There are 

 probably four broods in a season. When the nymphs appear, if there be no fo- 

 liage, they make their way into the opening buds. They secrete large quan- 

 tities of honey dew, which frequently drips from the leaves, and gets over the 

 whole of the tree and fruit, in which a black fungus develops. 



There is difficulty in treating the Psylla during the summer. Except 

 immediately following a heavy rain, the nymphs are usually so completely en- 

 veloped with honey dew that spray will not reach them, and the mature in- 

 sects are so active that when spray strikes a tree they instantly fly away, and 

 do not return until spraying is discontinued. 



An ounce of crude petroleum in the proportion of 1 in 16 (1 gal. of pe- 

 troleum in 16 gals, of emulsion), has in my experience proved the most satis- 

 factory in case a treatment must be given in summer, but I would depend 

 upon a very thorough application of lime and sulphur (lime 30 lbs., sulphur 

 20 lbs., in 40 gals, of wash, cooked two hours), made in March, to wipe out 

 the pest. At this season there are no eggs. The overwintered adults are 

 very sluggish, not at all like those of the summer broods, and these alone are 

 present. If the wash be driven well into all of the cracks of the bark th,e 

 <ii struction of the insects will be complete. 



Lime alone will destroy Psylla perhaps as completely as with sulphur 

 added, and will go a long way in cleaning off the black fungus, but lime alone 

 will not destroy scale insects, and these are invariably present. "Whether it 

 be lime, or lime and sulphur that is used, the wash must be liberally applied, 

 for it will not diffuse, but remains where it strikes the tree, and if the Psylla 

 is to be killed it must be hit. 



OBITUAEY. 



The Late John Alston Moffat. 



Through the kindness of Mr. G. L. Johnston, President of the Hamilton 

 Scientific Association, we are enabled to present our readers with an excellent 

 portrait of our late friend and colleague, Mr. J. Alston Moffat, who died at 

 the Victoria Hospital in London, on the 26th of February, 1904. For four- 

 teen years he had been the Librarian and Curator of the Entomological Soci- 

 ety of Ontario, and endeared himself to all with whom he came in contact by 

 his kindness and courtesy. It was always a pleasure to him to identify speci- 

 mens, and to exhibit the beautiful objects in the Society's cabinets to anyone 

 interested in natural history. He was a frequent contributor to the Canadian 

 Entomologist, and to these Annual Reports. In the last volume (the 34th 

 Annual Report, 1903, page 103) will be found an interesting account of his 

 "Recollections of the Past," which contains reminiscences of his life and re- 

 lates how he came to study entomology. 



"Mr. Moffat was born on the family estate of Milton, about three miles 

 frcm the city of Glasgow. Scotland, in the year 1825. Through business 

 misfortune his father lost his wealth and removed to Glasgow, where he en- 



