198 



IOWA ACADEMY OF SCIENCE Vol. XXV, Vns 



Fig. 41. — Spiderlingrs emergirig from cotoon ; XO. 



second nymphal stage was 23.3 days. The second iiyniplial 

 stage is therefore over ten times as long as the iirst nyinphal 

 stage. "^ ' 



The second nyni])li is of abont the same size as the first, or 

 quie&feent nymph. When it first emergen the body is slightly 

 smaller,, but as feeding takes place the bcdv becomes larger. 



