144 



NATURAL HISTORY OF INSECTS. 



A bag of fine gauze or mosquito netting (the finer and 

 stronger the better) should be sewed to a piece of cloth fastened 

 around the wire frame. 



Fig. 335. 



Fig. 336. 



Another similar but less convenient frame (Fig. 336) is thus 

 described by Professor Sanborn: " Make a loop of strong 

 iron or brass wire, of about three sixteenths of an inch in 

 thickness, so that the diameter of the loop or 

 circle will not exceed twelve inches, leaving an 

 inch or an inch and a half of wire at each end 

 bent at nearly right angles. Bind the two ex- 

 tremities to-gether with smaller wire (a), and tin 

 them by applying a drop of muriate of zinc, then 

 hold this part in the fire or over a gas flame until 

 nearly red hot, when a few grains of block tin or 

 soft solder placed upon these extremities will flow 

 evenly over their whole surface and join them 

 firmly together. Take a Maynard rifle cartridge tube, or any 

 other brass tube of similar dimensions (I ); if the former, file 

 yff the closed end, or perforate it for the admission of the wire, 

 and, having tinned it in the same manner on the inside, push a 



