—234— 



Iv lountl ill Viicca tl.iwers ' .uul this list is the result of my mvn oxami- 

 ii.uions nightly and daily tor numy years as well as the re.<uh of the ob- 

 servations of others. It includes nor Honey-bee nor oilur 1 lynienop 

 lera. Neither Mr. V. Perg.inde nor Mr. E. A. Schwarz, who have often 

 assisted me in my observations (^which cannot well be made alone), have 

 ^eon the honey-bee in these flowers. I would call upon Mr. Hulst to 

 ■^late positively and plainly whetlier he has ever seen the honey bee within 

 ;he llowers of Yucca, or in any way carrying pollen which he recognized 

 to be that of Yucca 



Against his statement I will place my own that honey-bees are very 

 rarely seen even about the flowers, and this is in accord with the ob- 

 servations of Herman Mueller.and others, that it is not attracted to white 

 llowers. It might be ever so abundantly flying udou/ the flowers with- 

 out having anv possible connection with their pollination unless it gets 



u'i/A.H. 



Instead of stating that fertiliziition was eflecied b\ Prouulhi alone 

 ,\jk1 "that every developed seed vessel bore evidence i>f the Mtnli by the 

 i>resence of the larvae within the capsule" I took }>articular pains to show, 

 m mv very rtrst article on the subject in 1872 *, that the fleshy-fruited 

 Yuccas exceptionally fructify without /'ro/;tt/'<;. ^'ubsequently. in 1880 I 

 explained how this might exceptionally occur. In proof 1 quote: 



"It is so very plain irom the above quotations that, while I have 

 lield and still maintain that it is the rule for our \uccas to be poilinized 

 bv Prunula. 1 have nevertheless admitted that the rule is not without 

 exceptions. The rarity oi Yucca-fructiHcation in tliose parts of .Americv 

 or in other countries where the plants are not indigenous and Prouut'; 

 may be presumed not to occur; the uniform failure to Iructify whenever 

 the moth has been excluded from the flt)wers both in my own experi- 

 ments and those of Mr. J. M. Milligan and of Mr. .Meehan; and the 

 non-fructification, even where the moth exists, of those species which 

 bloom either before or after she appears all serve to emphasize the rule. ' 



1 have also drawn attention to the occurrence of capsules non-in- 

 fested with the Pronuba larvae and explained why such are found.*. 



Mv statements in reference to the methods of oviposition and polli 

 nation and their consequences, resulted from the most careful stud\. 



» Pioc. Am. Ass. Adv. Sci., Vol. \.\l\.. \\ 02(1. 



s Trans. St. Louis Acad. Sci., Vol. III. 



» Proc. Am. Ass Adv. Sji., Vol. XXIX.. p. 627. 



4 lh„]^ p. 623. 



