aw) THE CANADIAN KNToMOUKJIKT. 



Iiope I have escaped such solecisms, but it is very hard to be entirely 

 certain in a few instances, and I shall be grateful to any one who will point 

 out such instances in my work. 



The following quotations from Stiles and Hassall's interpretation of 

 the International Code of Zoological Nomenclature' contain the axioms 

 by which I have been principally guided in proposing types for the genera 

 of Lyltida' : 



1 I regard "the practice of failing to designate the type species (of 

 genera) as one of the most fruitful sources of confusion in systematic 

 literature." (Page lo.) 



2. "Types should be determined for all generic names as soon as 

 possible, since a generic name without a definitely-established ty|)e is 

 always an element of danger in both systematic and bibliographic zoology." 

 (I'age 1 1.) 



3. "The adoption of a rule by the Internaiionr.l Commission on 

 Zoological Nomenclature, to the effect that no new generic name may 

 demand recognition unless the author definitely fi.xes the type at its 

 original publication is worthy of serious consideration." (Preface by 

 Salmon.) 



4. "When, in the original publication of a genus, one of the species 

 is definitely designated as type, this species should be accepted (by the 

 later author who is selecting types) as type, regardless of any other con- 

 siderations." (Page 30.) 



5. "If a genus, without designated type, contains among its original 

 species one possessing the generic name as its specific or subspecific 

 name, either as a valid name or synonym, that species or subspecies be- 

 comes ipse facto type of the genus." (Page 32.) 



6. "If an author, in publishing a genus with more than one \alid 

 species, fails to designate or to indicate its type, any subsequent author 

 may select the tj|)e, and such designation is not subject to change." 

 (Page 52.) 



7. "A genus proposed with a single original species takes that species 

 as type." (Page 25.) 



S. In selecting ty[)es not subject to the f<)regoing rules the following 

 principles have been followed : 



2. The nelcrminalion of O cncric Types. Washington, 1905. 



i 



