REARING AND RECORD KEEPING 



199 





fes 



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of wire cloth* by doubling and twice folding ("hemming") 

 two edges together, then 

 opening it out, forming first 

 a cylinder; then in like 

 manner the ends are cross 

 folded and closed. Two 

 tools only are needed: tin 

 shears to cut the cloth and a 

 tinner's small (4") folding 

 tongs to make the "hem." 

 All kinds of materials con- 

 taining fully fed larvae or 

 pupae may be shut inside 

 to await their transforma- 

 tion. The nymphs of dra- 

 gonflies and other aquatic 

 insects may be reared in it, 

 if it be only partly immersed 

 in the water, leaving room 

 in the part above for their 

 emergence as adults. 



For observing the feeding habits of such terrestrial insects 

 as grasshoppers and crickets there is probably nothing better 

 than the old reliable lantern-globe cage shown in figure 72, 

 consisting of a flower pot containing a growing sod, the 



* Ordinary window screen wire cloth 36" wide cut into four per yard 

 makes cages of convenient size for most common insects. To avoid pricked 

 fingers, the woven edge should form the top. 



Fig. 71. — A cage for rearing insects. A 

 square of wire cloth is doubled and the edges op- 

 posite the fold are "hemmed" (that is, twice 

 folded over) by means of a tinner's folding 

 tongs. It is then opened out into a cylinder as at 

 S; then the ends are cross folded as at R to com- 

 plete the cage. T is a section of the side seam of 

 the completed cage. Bug tight. Easily opened 

 and closed with the fingers. 



