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JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 10 



those of set C the same as those of B except that dilute honey was used 

 instead of water. Thus the 25 moths of set A had no sustenance what- 

 ever, those of set B had water, and those of set C dilute honey for food. 

 Chart E puts the result of this experiment in compact form. It will 

 be seen that the moths of set A were out of the running from the start 

 as they lived a total of but 37 moth-days, laid but 59 eggs each on the 



Total eggs 



Average eggs per moth 

 Total moth-days 

 Average eggs per moth-day 



average, or 39.9 per moth-day. A moth-day is the life of one moth for 

 one day. Sets B and C were much more nearly tied and, except for 

 the fact that many and varied repetitions of the test bore them out, 

 the results could hardly be considered conclusive. The moths of set 

 B, with water only, lived 117 moth-days, averaged 172 eggs per moth, 

 or 36.7 eggs per moth-day. Those of set C with both food and drink 

 in the form of dilute honey lived 104 moth-days, averaged 168 eggs 

 per moth, or 40.3 eggs per moth-day. Thus it is seen that the moths 

 with water only exceeded either of the other two sets in longevity and 

 in number of eggs produced. Other experiments resulted in even 

 greater superiority for the water-fed moths over those supplied with 

 honey. A similar test using ten males in each set resulted in 10 moth- 

 days for set A, 72 for set B and 43 for set C. 



Comparative dissections of newly emerged and spent moths show 



