Brief guide to the commoner butterflies of the northern United States and Canada; being an introduction to a knowledge of their life-histories . mine. Skilful persons may attain some successwith thin-skinned chrysalids, like that of the milkweedbutterfly, for instance, the shape of whichis difficult to retain, by removing the con-tents through a small opening at one sideand stuffing with cotton. The best form of net for the capture ofbutterflies is a bag fastened to a hoop orring of some sort, to which a handle maybe attached. The hoop should be made ofgalvanized iron wire, forming a circle ab
Brief guide to the commoner butterflies of the northern United States and Canada; being an introduction to a knowledge of their life-histories . mine. Skilful persons may attain some successwith thin-skinned chrysalids, like that of the milkweedbutterfly, for instance, the shape of whichis difficult to retain, by removing the con-tents through a small opening at one sideand stuffing with cotton. The best form of net for the capture ofbutterflies is a bag fastened to a hoop orring of some sort, to which a handle maybe attached. The hoop should be made ofgalvanized iron wire, forming a circle abouttwelve to fourteen inches in diameter, and * the bag, made of double bobbinet and at- fr^e for^utter-tached to the wire by strong linen or cotton, flies, a, wire ring,should taper regularly, have a rounded with fnds b?nt,t0 , , insert into the fer- bottom, and be about thirty inches long, rule, 6; c, pointso as to double over the net and and have where tbe Plug « . , t, , ,. ,_ and net handle a lew inches to spare. By bending the meet. two ends of the wire as in Fig. 6, they can be dropped into a brass tube and securely fixed in place. 192 APPENDIX. by a tight plug of hard wood, leaving the other end ofthe tube open for the insertion of a removable handle;or a very convenient form of net can be constructed onthe following plan shown in Fig. 7 and thus described
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