June, 1913 Bulletin of the Brooklyn Entomological Society 61 



disc lead color and margined with bright orange. Expanse 32 mm. 

 female. 



The four specimens in the collection of Mrs. Slosson are 

 larger, from 35 to 37 mm. There is also a "Florida" specimen 

 in the collection of the Brooklyn Musemn of Arts and Sciences, 

 evidently collected many years ago, as the orange has faded 

 into a much lighter shade. In the Museum of the Academy of 

 Natural Sciences of Philadelphia there is a specimen with a lead 

 colored collar correctly determined as Pygarctia ahdominalis, 

 but it bears no locality label. 



Table for the Determination of the Described Species of Pygarctia. 

 Forcwing with fasciae on costa and inner margin. 

 Fasciae on cosfa and inner margin red. 



(Kansas, Colorado), spraguel Grotc. 



Fasciae on costa and inner margin bright orange. 



(Florida) gtosibecki Davis. 



Fasciae on costa and inner margin yellow. 



Abdomen red (Texas) vivida Grote. 



Abdomen light orange. 



(New Jersey, Alabama) abdominalis Grote. 



Forcwing without fasciae on costa and inner margin, or costa merely 

 edged with white. 

 Wings wholly white. 



(Southwestern States to South America) elegans Stretch. 



Wings creamy whitish-gray (New Mexico) oslari Rothschild. 

 Wings pale grayish, inner margin of hindwing red. 



(Texas) neomexicana Barnes. 



Wings gray, a large yellowish-white mark at end of cell of fore- 

 wing (Mexico) plerygostigma Dyar. 



Forewing sooty brown, crimson at base, hindwing brownish 

 gray, semihyaline (Arizona) ftisca Rothschild. 



The Rarest Hepialid. — Two specimens of Hepialus auratus 

 have been captured by a member of the Society at high eleva- 

 tions in the Catskill Mountains. Both were resting on tree 

 trunks in dense woods and both were cf. It is asserted that 

 not more than six of this species have ever been recorded. Both 

 are now in the collection of Dr. Wilham Barnes. 



Aletia argillacea. — The annual northward swarming of the 

 cotton moth was observed last year in October by Mr. Howard L. 

 Claik near Bristol, Rhode Island. 



