:3G 



ed from perfecting sectli^. Me may fairly l)elieve tluit a plant wliich 

 acquires the power of easy individual increase and persistence, 

 would show less disposition to sacrifice itself on seed; and thus Ave 

 do find in nature that it is among" that class which has the most of 

 this individual persistence, that the indifference to self-fertilized seeds, 

 popularly known as '•arrangements for cross fertilization" is found; 

 and moreover that the most dif^culty in germinating is met with, 

 even when the seed is freely formed. 



The Yucca by its large fleshy root stocks, and ability to withstand 

 extremes of drouth, and heat, and cold, is able to maintain an exist- 

 ence indefinitely without producing any seed. For the sake of in- 

 ducing variation, which is best accomplished through seeds, it may 

 be compelled by inexorable law once in a while to produce them ; 

 but a law which is to result in the evolution of ncAV forms will 

 hardly l)e adduced in favor of any theory whicli has for its founda- 

 tion the idea of benefit to an cxistino- race. 



Notes oil Wallcef's Type.s of*Toi*tfioi<lae oF 

 Nortli Amei-icii. 



liy Prof. C. H. Ferxalt). 



Teras vicariaiia Tortrix rosaccana Harris. 



Teras albaniana 2'ortrix. 



Teras obsoletana Tortrix vcspcrana Clem. 



Teras retradana. The specimen in place and purporting to be this type is from 

 Australia, as is indicated by a small label on the pin, and does not in any way answer 

 the description of refradana. 



Teras subauratana Cenopis relicrdatana Clem. 



Teras tlndana 7'ortrixjinvedana Clem. 



Teras rostrana. 2'ortrix brevior7iatana Clem 



Teras xanthoides, 



Teras hudsoiiiana, near TcV. cdiana Robs. Probably a var. of Teras hast'unia L. 



Teras j^ulverosana . Pos.eibly a var. o^ Teras hastiana L. 



Vacoecia transiturana Tortrix sanbornana Robs. 



Cacoecia? velutinajia I'orlrix lutosana Clem. 



(Jacoecitfervidana* 2'ortrix Hilei/ana Grote. 



Cacoecia triferana Tortrix incertana Clem. 



Batodes bipustulana Anchylopera costomaculann Clem. 



Amphisa luridana. This belongs to the Choreutina. 



Dichelia inconclusana 2ortrix peritana Clem. 



Dichelia furcatana. Tortrix. 



Tortrix frigidana. Sarrothripa. 



Tortrix confiictana Tortrix. 



2'ortrix scriptana. Sarrothripa. 



Tortrix concursana 2'ortrix Jiavedann Clem. 



Lophodcnis vestitamis. The type is not in the Coll., but a label witii (he word 

 ''lost'' in Walker's writing is inserted in the place of it. 



Lophoderus tnclahucnniis 2'ortrix, 



*j Prcoccnpi('(l. 



