EXPLANATION OF PLATE E 



Fig. a. Vivarium, or cage in which to breed caterpillars. 



a, base, kept even by cleats, g, g; on this is placed a pan 4 inches deep made of 

 sheet zinc, and filled with earth; to the middle is soldered a tube of zinc, into 

 which a large bottle fits; the bottle is filled with water to keep the plants placed 

 in it fresh and green; b, outer case, with sides of glass, fitting closely about the 

 zinc pan; c, top, covered with wire-cloth, rabbeted on b, and easily lifted off. 



Fig. b . Diagram showing way to make paper envelopes for butterflies. 



Fig. c. .Envelope folded with butterfly inside. 



Fig. d. Stretching board for expanding moths and butterflies. Strips of tracing muslin 

 are used on this to keep the wings down, paper will also serve the purpose. 



Fig. f . Stretching board, showing how wings may be held in place by pieces of thin card- 

 board. 



Fig. e . Showing the way in which the antennae and body may be held in place with inseoi 

 pins while the insect is drying. 



