ACQUISITION AND PRESERVATION 



223 



the pronuba moth docs collect the yucca pollen and 

 place it in the stigmatic chamber, and that it. has 

 organs, belonging to no other insect of the order, pe- 

 culiarly developed for the purpose, than if he reads 

 or is simply told that some of the organs of fishes which 

 dwell at great depths in the sea, being adapted to sus- 

 taining great pressure, burst when brought to the 

 surface-water; that the angler, which dwells at great 

 depths, bears on the tip of the dorsal spine overhanging 

 its head a phosphorescent light that attracts small fish, 

 upon which the angler feeds. 



MATERIALS FOR FIELD COLLECTING. 



The inland teacher has a wealth of material right at 

 hand, easily obtained and as easily prepared. The tools 

 required for collecting are: a net, cyanide bottle, vials 

 for preserving, alcohol TO^f, formalin solution 2 c /o. 



How to Make a Net. - - The frame of the net is made 

 of a circle of wire, in size about NV>. s. The circle is 

 twelve inches in diameter; the ends of the wire circle 

 are bent out, and are then soldered into a thin thimble 

 five inches long. This part of the net had best be made 

 by a tinner, and the cost of the same should be but a 

 few cents. An empty fifty-pound flour-sack, thoroughly 

 washed and bleached to remove the starch, may then 

 be fastened to this rim. The rim of the net coming in 

 contact with bushes wears out quickly, and therefore a 

 binding of heavy material is placed there to give extra 

 durability to the net. The thimble should not be over 

 an inch in diameter. Fit into the end of this thimble 

 a broom-stick about three feet long, and the net is ready 

 for use. 



