108 BULLETIN 132, UNITED STATES NATIONAL MUSEUM 



7. TIA, new genus 

 (Figs. 53, 195) 



Genotype. — Argyrovloce vulgana McDunnougli (North America). 



Characters as in Endothenia except: 



Hind wing with veins 6 and 7 anastomosing just beyond cell; 5 

 aj^proximate to 4 at base; no chitinous thickening on inner margin 

 in male. 



Male genitalia witli a squamous pad arising from membrane over 

 basal opening of harpe; spine cluster Spc'^ absent; spine cluster 

 Spc^ strongly developed. Uncus slender; very slightly bent; apex 

 pointed, Socii fusing with tegumen but very broad and defined by 

 heavy hair tufting. Gnathos represented only by a thinly chitinized 

 flat subanal plate attached to alimentary tube; lateral arms ab- 

 sent. Aedoeagus swollen at apex; penis squamous; cornuti absent. 



Female genitalia with signum a single very weak scobinate patch ; 

 ductus bursae short. 



Closely related to Endothenia. 



TIA VULGANA (McDunnough) 



(Figs. 53, 195, 412) 

 Argyroploce vulgana McDunnough, Can Ent., vol. 54, 1922, p. 46. 



Paratypes of this have been deposited by Doctor McDunnough 

 in the Barnes and National Collections, 



Male and female genitalia figured from paratypes in collection 

 Barnes from the type locality. 



Alar expanse. — 14-16 mm. 



Type. — In Canadian National Collection. 



Type locality. — Nordegg, Alberta. 



Food pla7it. — Unknown (probably birch, according to McDun- 

 nough). 



8. HULDA, new genus 



(Figs. 52, 193) 



Genotype. — Penthina inipudens Walsingham (North America). 



Characters as in Endothenia except: 



Hind wing with vein 5 approximate to 4 at base. 



Male genitalia with spine cluster Spc^ on harpe strongly devel- 

 oped. Tegument abnormally developed, folded over beneath and 

 hooding the anal tube. Uncus reduced to a mere vestige. Socii 

 long, narrow, strongly chitinized and rigid; projecting at right 

 angles from tegumen; unhaired. Gnathos a narrow, arched band 

 arising from near base of tegumen. Aedoeagus slender, moderately 

 long; cornuti absent. 



Female genitalia with signum a weak scobinate patch. 



