200 THE CANADIAN ENTOMOLOGIST. 
for so many ages, that the Vitis vinifera with it was more of a favorite: 
He excused himself from any lengthy remarks on account of his limited 
English, and would briefly say that he agreed entirely with Prof. Riley’s 
views regarding it. 
Mr. Thomas Meehan gave a history of grape-culture and grape-diseases 
in Pennsylvania from the earliest time to the present, and showed that the 
failures had never been satisfactorily explained on any theory sometimes 
given, such as change of climate, or depletion of the soil. There were 
always some facts or figures which rendered every previous theory inad- 
missable to his mind, as he had frequently stated in other places. Prof. 
Riley’s insect discovery, however, met all the requirements of the case, so 
as to give an air of possibility to Mr. Riley’s views, such as no other 
theory has possessed. ‘That when we saw the foreign grape and others 
which often did perfectly well for years in one locality, and then failed, it 
seemed absurd to suppose that the climate or soil suddenly gave out ; but 
a sudden incursion of a brood of root-insects was a cause that could have 
such a sudden effect.— Gardener's Monthiy. 
LEAF-CUTTER BEE.—For five summers a rose-leaf-cutter bee has built 
her nest in a narrow-spouted watering-pot in my garden, and I have just 
heard of another nest, found in the touch-hole of a gun belonging to our 
volunteer artillery. My books on entomology only mention these bees’ 
nests as found in earth or cavities of walls; therefore I venture to record 
the above as rather unusual localities.—F. C. in Hardwickes Science 
Gossip. 
ADVERTISEMENTS. 
EXCHANGE.—I am desirous to exchange English for Canadian or 
American Lepidoptera. I should also be glad to exchange living pupæ 
of many British Lepidoptera for pupae of American species. J. C. 
WaAssERMAN, Beverly Terrace, Cullercoats, North Shields, England. 
COLEOPTERA FOR SALE.—A number of Rocky Mountain Coleoptera 
will soon be for sale in sets by JoHN AKHURST, 19, Prospect Street, 
Brooklyn, N. Y. 
