114 PROC. ENT. SOC. WASH., VOL. 20, NO. 5, MAY, 191* 



individuals. -Each day's eggs wore given their proper decimal 

 number. Thus, if the female was No. I, the eggs would be Lots 

 I.I, 1.2, etc. The first larvae hatching in each lot were removed 

 and placed in a phial and given the decimal 1, those hatching the 

 next day 2, etc., until all were hatched. Thus, Lot 1. 11 consisted 

 of the first larvae to hatch from the first day's eggs of female No. 

 I. The larvae molting during each day were moved to a fresh 

 phial and given the next decimal. Thus, Lot I.I 11 comprised 

 the earliest second instar larvae from eggs of female No. I, and so 

 on. The phials were kept in numerical order in a nearly vertical 

 position in small trough-like racks holding twenty or more phials. 

 The following is a copy of a page from the writers notebook on 

 the life-history of the current- worm, and shows the method of 

 keeping the notes. 



Actual date of .publication October 3, 1918 



