ROSS: HOW TO COLLECT AND PRESERVE INSECTS 



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aspirator shown in fig. 5 can be made. In making this, use only 

 one stopper, 5b. Drill two holes in it. Bend the pieces of narrow 

 glass tubing, 5c and hd, as shown and insert both in the cork. 



Fig 4. — Aspirator or sucker. This is how the type made from glass tubing 

 looks when assembled; end g goes in the mouth, c picks up the insects. Shown 

 also is the cyanide cork i-h, which is used to kill insects in the aspirator. 



Fig. 5. — Vial type of aspirator. Note the short length of c projecting inside 

 the vial, and long tube, f. Compare these parts with equivalent parts in fig. 4. 



Using a longer piece of rubber tubing, 5/, complete minor details 

 as described for the first aspirator, not forgetting the cheese- 

 cloth, be, and assemble the parts as shown in fig. 5. 



To kill insects in either aspirator, use a small cyanide bottle, 

 4i, which is inserted in a cork, Ah, that has been partially bored 

 through to receive it. This cork should be the exact size of the 

 tube or bottle for which it is intended. 



To use the cyanide cork with the aspirator shown in fig. 4, 

 plug the intake tube, 4c, with a tapered paper plug or a leaf, jar 

 the insects away from the stopper at the opposite end, remove 

 this stopper cautiously, and quickly insert in its place the cyanide 

 cork. When the specimens are stupefied, they may be transferred 



