118 THE CANADIAN ENTOMOLOGIST. 



Family Thyridae. Type Thyris fenestrella, Scop. 



Family Pyromorphidae. Type Pyromorpha dimidiata, H.-S. 



Family Pterophoridae. Type Pterophorus monodactyla, L. 



Family Pyralididse. Type Pyralis pinguinalis, L. 



Family Tortricidae. Type Tortrix viridana, L. 



Family Sesiadae. Type Sesia culiciformis, L. 



Family Cossid;e. Type Cossus cossus, L. 



Family Ptochopsychidae. Type Ptochopsyche Melsheimerii. Harris. 



Family Psychidae. Type Psyche viciella, Schiff. 



Family Adelidae. Type Adela Degeerella, L. 



Family Tineidae. Type Tinea pellionella, L. 



Family Orneodidae. Type Orneodes hexadactyla, L. 



Superfamily Micropterygides, Grote, 1895. 



Family Micropterygidae. Type Micropteryx Sparmannella, L. 



Family Eriocephalidae. Type Eriocephalus calthella, L. 



Superfamily Hepialides, Grote, 1895. 

 Family Hepialidae. Type Hepialus humuli, L. 



THE LINN.EAN GENUS GRYLLUS. 



BY JAMES A. G. REHN, PHILADELPHIA. 



The Linnsean genus Gryllus, as first recognized in the tenth edition 

 of Systema Naturae, was composed of a number of sections which, while 

 some have been recognized, are generally discarded. These names are 

 used in the sense of subgenera, and as such are entitled to recognition. 

 The case in hand being a deeply involved one, we must find some guide 

 to be used as a standard in properly handling these names, and as to-day 

 the Code of the American Ornithologists' Union is generally recognized 

 as the vade mecum, we shall follow that. Canon XIX. of this Code is to 

 the effect that a name " once established is never to be cancelled in any 

 subsequent subdivision of the group, but retained in a restricted sense- 

 for one of the constituent portions." With this before us we must pro- 

 ceed to find on what a name should be retained. As was the case with 

 the earlier writers (and is frequently the case with modern writers), 

 Linnaeus specified no types, and we must refer to the Code for help. 

 Canon XXIV. informs us that "when no type is specified, the only 



