466 



JOURNAL OF ECONOMIC ENTOMOLOGY 



]Yo\. 3 



TABLE 10 



The season of 1910 was three to four weeks in advance of 1909 as 

 has been graphically shown in a recent bulletin by the author.^ Hence 

 tables for 9 Apr. 1909, and 14 Mch. 1910, represent practically 

 equivalent times in the two years so far as the alfalfa-growth dnd 

 life-history of the weevil are concerned. 



In the same manner 2 May 1909 and 3 April 1910, 25 May 1909 

 and 18 April 1910, and 6 July 1909 with 18 June 1910. It will be 

 noticed with these last two dates mentioned that the comparison with 

 7 July 1910 shows that the seasons were by that time more nearly 

 equal. After early July both egg and feeding-punctures are very rare. 

 The adults that are still laying eggs evidently deposit them singly as 

 they did at the beginning of the season. 



Early in the spring there are many more feeding-punctures than 

 egg-punctures and it is not until the adults have been laying eggs for 

 several weeks that they bring the number of egg-punctures up to an 

 equality. As the season advances the adults feed more and more 

 on the leaves and epidermis of the stalk and make less feeding-punc- 

 tures, so that the final relation is nearly equal. 



The maximum number of feeding-punctures to any stalk does not go 

 far above the average, although as many as six were counted several 

 times. Eighteen egg-punctures in one stalk, even in a large stout 

 stalk as this one happened to be," fairly riddled the stalk and it had 

 broken down. Twenty-six eggs hardly crowded the stalk they were 

 in; it was large and somewhat hollow and the female could have 

 deposited more so far as space was concerned but she instead plugged 

 up the hole with excreta. 



After a few weeks of strenuous and rapid egg-laying eggs are again 

 laid sparingly for an indefinite period, certainly until late in October 

 and perhaps until complete hibernation begins. Over-wintering 

 females were examined in early November and found to still contain 

 a number of well-developed eggs. 



11910: Titus: Utah Agr. Exp. Sta. Bui, 110. Charts I and II. 



