THE CANADIAN ENTOMOLOGIST. 49 



beginner. In the first place I would advise all those who cannot afford a 

 large cabinet with good fitting drawers, to go to any good joiner and have 

 some boxes made after the following pattern : Take the lumber about 

 three-sixteenth inch thick for top and bottom, for the sides quarter of an 

 inch. Have the box about 15 inches long by 12 inches wide, and 4 inches 

 thick outside measure, and shape it book form, the bottom and top a quarter 

 of an inch projecting. That portion which represents the cover of the book 

 is cut into lengthwise, so as to make two receptacles, each about two inches 

 high. The back is made of three-quarter inch lumber, in the shape of the 

 back of a real book, which is covered with some strong cloth or thin 

 leather outside, and cloth inside, to act as hinges. The two parts will 

 have to be constructed so that they will, by closing them, fold together 

 about a quarter of an inch. Have this neatly covered and lined with a 

 suitable soft material, and it will be a tight and handy box for any kind of 

 insects. Before transferring insects in a new box, I put them on cork and 

 expose them to a moderately hot oven, which I also invariably do with 

 insects received through exchanges. After a certain time, say half an 

 hour, I take them out, and they are placed in the box, in which is pinned 

 a little sponge the size of a small nut, saturated with carbolic acid 

 (crystallized), which has to be renewed every 6 or 8 weeks. Old cabinets 

 infested with parasites, when once introduced, can be cleared by 

 the same method, only that the drawer or box, before pinning back the 

 specimens, also has to be exposed to the heat of the oven. 



I promised you my further success in hatching Lepidoptera with arti- 

 ficial heat. Pupae of Hyperchiria io taken to a warm room, 64-80 

 degrees, on Feb. 10, 1884, came out as follows: — 



Feb. 24, one ^ and one % 



" 26, one ^ . 

 Feb. 27, one ? 



28, one ^ 

 Mch. I, one $ 

 " 3, one $ 



Of the lot taken to the room on December 5, a $ of T. polyphemus 

 hatched on Feb. 16, depositing 142 eggs within three days, commencing 

 laying the first night \ eggs, of course, were sterile. 



I 



