HENRY SKINNER. 169 



The Larger Boreal Aiuerioan Hesperirtfe, includiii.i;' 



EUDAMUS, ERYCIDES, PYRRHOPYGE 



and MEGATHYMUS. 



BY HENRY SKINNER, M. D., SC. D. 



My object in writing this paper is to supply students of the 

 Lepidoptera with a work which will enable them to study 

 and name their specimens. The literature of entomology is 

 so scattered through various publications that it is impos- 

 sible for any but those having access to large libraries to 

 properly study their material. 



It is hoped that the present paper may so cover the ground 

 that the reader will have all required for the purpose of iden- 

 tification. The original descriptions are given in nearly all 

 cases and any other information which appeared to be of 

 value. I had intended to write a monograph but gave up 

 the idea on account of the great amount of synonomy and 

 the necessity of repeating so much already in print. I have 

 considered the species under the old generic names as I con- 

 sider the unisexual classification in vogue, based on second- 

 ary sexual characters, as unscientific and untenable. Those 

 who wish to study these genera can find the desired informa- 

 tion in the writings of Dr. S. H. Scudder ; Watson in the 

 Proceedings of the Zoological Society of London, 1893 ; 

 Godman and Salvin, Biologia Centrali-Americana ; Mabille, 

 Genera Insectorum, and H. G. Dyar, Jour. New York Ent. 

 Soc, 13, 111, 1905. They are divided into a multiplicity of 

 genera, almost one to a species. Before the classification 

 can be placed on a scientific foundation it will be necessary 

 to restudy the species from a generic standpoint, omitting 

 characters limited to one sex. 



A LIST OF THE SPECIES TREATED. 

 Electra. Mexicanus. 



Pylades. Mysie. 



Var. iminaculata. Aemilea. 



Bathyllus. Caicus. 



TRANS. AM. ENT. SOC, XXXVII. (22) 



