550 PROCEEDINGS OF THE NATIONAL MUSEUM 



Examination of the genitalia of the types and specimens compared 

 with the types of the two American species, S. castaneae and S. 

 cuprescens, has revealed some interesting new facts that permit a 

 clearer understanding of the occurrence of this predominantly 

 Palaearctic group in the Nearctic Region. The results of these 

 findings are presented in the present paper. 



I wish to thank Dr. J. G. Franclemont for permitting me to study 

 material from the Cornell University Collection, Dr. T. N. Freeman 

 for providing records from material in the Canadian National Collec- 

 tion, Dr. G. J. Spencer for lending specimens from the University of 

 British Columbia Collection, and Dr. Annette F. Braun, Cincinnati, 

 Ohio, for comparing material from the United States National 

 Museum with the type of S. cuprescens Braun in her personal collec- 

 tion. 



Genus Sivatnmerdaniia Hiibner 



Swammerdaviia Hiiliner, 1825, Verzeichniss bekannter Schmettlinge [sic], p. 425. 

 (Type species, Tinea pyrella De Villers). 



Head rough. J.abial palpus short, porrect. Forewing semilanceo- 

 late, terminal cilia long; 11 veins, all separate; 2 from well before 

 angle; 3 from angle; 6 absent; 7 to termen. Hindwing slightly 

 narrower and more lanceolate than forewing, with a subbasal hyaline 

 patch; 7 veins, all separate; 4 absent. 



Male genitalia: Harpe simple, sacculus large; ventral plate of the 

 gnathos lightly sclerotized, broad, armed with numerous small spines 

 or nodules; saccus slender, approximately parallel sided; aedeagus 

 with cornuti. 



Female genitalia: Anterior apophyses short, ventral arms widening 

 at tips; lamella postvaginahs with a pair of fingerlike setiferous lobes; 

 ostium bursae with dentate signum. 



Key to the North American Species of Swammerdamia 

 Based on the Genitalia 



Male 2 



Female 3 



Aedeagus short, straight, pointed at apex; one or more long, heavy setae on 



sacculus of harpe S. pyrella (De Villers) 



Aedeagus long, crooked, bluntly pointed at apex; sacculus without long, 



heavy setae S. heroldella Hiibner 



Ductus bursae with granular sclerotizations on posterior half, shorter than 



length of abdomen S. pyrella (De Villers) 



Ductus bursae membranous, much longer than length of abdomen 



S. heroldella Habner 



