120 THE CANADIAN ENTOMOLOGIST. 



will be about fifteen days, and allowing four days for duration of the egg, 

 we may conclude that this is deposited from ist to 15th of July. There- 

 fore, an effort should be made to take the females the last of June or first 

 of July ; and when taken, they should be enclosed in a gauze bag, on a 

 stem of Hop, or on Nettle, Elm, and perhaps Currant or Wild Goose- 

 berry ; or enclosed in a keg, if convenient (nail or powder keg), from 

 which the heads have been removed, and the upper end covered with a 

 cloth, held down by one of the hoops. Care should be taken to stop up 

 all holes next the ground by which the insect would escape. In this way 

 eggs will infallibly be had, if the insect is confined with the food plant of 

 the larvae. In the present case, as that is not certainly known, if after 

 24 hours no eggs are found to be deposited, I should try one of the other 

 plants named. If eggs are obtained, two or three should be placed in a 

 small vial of water, to which has been added a few drops of carbolic acid 

 solution, which preserves them effectually, and should be sent by mail to 

 Miss Mary Peart, Pauling, Chester Co., Pennsylvania, for drawings 

 for me. In the same way, the lame at different stages may be sent, in tin 

 or wooden (not paper) boxes, by mail, with a supply of the food plant, 

 advising by letter of such sending. The chrysalis may be sent in the 

 same way as soon as formed. It is desirable that as full notes as possible 

 should be taken of the changes of the larv?e. These I will publish, as 

 well as the drawings, in Vol. II of But. N. A., with credit to the discoverer 

 and observer. 



In the same way, it is desirable that the larva of G. gracilis should be 

 found, and I will give a similar reward for the discovery of the preparatory 

 stages of this species, if attention is given to my directions in forwarding 

 the eggs, larvre and chrysalids for drawings. — Wm. H. Edwards, Coal- 

 burgh, West Va., May 24th, 1873. 



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. 



