184 



IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



The method by which the female spins her cocoon and lays 

 therein her eggs is of considerable interest and does not appear 

 to have been reported, although McCook gives some notes on the 

 jiroeess which are believed to be considerably in error. The 

 writer had the good fortune to witness the complete cocooning 



l'"i(!. 3 4. — The second stage of the cocooning process, placing the egg mass 

 in the cone-shaped foundation. Drawing X4. 



process by one of the females kept in captivity. Previous t-) this 

 time he had on a few occasions noticed a part of the process. 

 The cocooning is done usually late in the day, in the evening or 

 at night, and as far as was observed was never done during the 

 heat of the day. This accounts for the difficulty experienced 

 in obtaining observations of the process. 



