140 THE CANADIAN ENTOMOLOGIST. 
spot by the sense of smell and not by sight. The light in the room could 
not have been the primary attraction, as it was so obscured by a trellis 
covered with creepers as to be hidden from view a few yards off. 
Not long after I tried the same experiment with a female Promethea, 
but with no success whatever, though the evenings were often favourable. 
This failure I attributed to the scarcity of its food plants in the immediate 
neighbourhood (its cocoon was brought from a considerable distance),and” 
the consequent absence of males within reach of the females’ attractive 
powers.—C. J. 5S. B. 
Noxious Insecrs.—The Hessian-fly ( Cecidomyia destructor) has made 
its appearance in the neighbourhood of London, Ont., and has done a 
great deal of injury to the spring wheat. The Colorado beetle (Dory- 
phora decem-lineata) is very abundant throughout Western Ontario, but, 
we are happy to say, is being well kept down by the intelligent farmers of 
that district, who wage an exterminating war upon it with Paris Green. In 
its eastern progress it has nearly traversed the whole Province of Ontario, 
but not yet in sufficient numbers to occasion much diminution of the 
potato crop. ‘To the south-east we learn that it has invaded Maryland 
and Pennsylvania. In the neighbourhood of London and Guelph, Ont., 
we observe, with great regret, that the Locust trees are being rapidly 
destroyed by the ravages of the borer (Arhopalus robinie, Forster). 
Young Apple and Mountain Ash trees are also suffering grievously from 
the attacks of the Buprestis borer (CArysobothris femorata, Fabr.) About 
Port Hope, Ont., this summer, the Forest and American Tent caterpillars 
(Clisiocampa sylvatica and Americana) have been more than usually 
numerous and destructive.—C. J. S. B. 
ADVERTISEMENTS. 
ExcHANGE.—I am desirous to exchange English for Canadian or 
American Lepidoptera. J. C. WassERMAN, 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. 
} Lise 
Se SE 
