128 U- S. NATIONAL MUSEUM BULLETIN 2 09 



and basal portion of legs clothed with a dense appressed gray to 

 yellowish pubescence. The forewing is brown, beyond the marginal 

 cell snow-white, the marginal cell and below it darker than elsewhere. 

 The maxillary hair basket is described as having "pale" bristles, but 

 an examination of the type shows them to be blackish. 



Specimen: 9 (type), Bull Prairie, Camas Prairie Summit, 7,500 

 ft., Lake County, Oreg., July 22, Frewing (San Francisco). 



7. Dipogon (Deuteragenia) sayi Banks 



Male: Forewing 4.5 to 6.3 mm. long; apical part of clypeus some- 

 what impressed, its margin weakly reflexed; flagellar segments each 

 with an angular subbasal swelling which gives the flagellum a notched 

 or stepped appearance; first flagellar segment about 3.7 as long as 

 wide; hooks on sixth sternite long, strong, curved inward and a little 

 backv/ard; subgenital plate broadly lanceolate, with an apical notch 

 and a high blunt keel which is highest subbasally. 



Black. Wings hyaline, marked with fuscous. 



Female: Forewing 5.5 to 9 mm. long; clypeus with a stronglj^ im- 

 pressed, transverse, preapical trough, the margin appearing somewhat 

 reflexed; mesoscutum subpolished, with small sharp punctures; meso- 

 pleuron subpolished, with small, rather weak punctures that are 

 separated by about 0.3 their diameter; propodeum medially sub- 

 polished, with rather small, sharp punctures separated by about their 

 diameter; second tergite subpolished, with small punctures separated 

 by about 1.7 their diameter. 



Black. Wings subhyaHne, the forewing with two conspicuous 

 fuscous bands, a narrow one along the basal vein and nervulus and a 

 broad one beyond the middle of the stigma ; apical margin of forewing 

 and apical part of hind wing weakly infuscate. 



There are two subspecies, which together cover most of the United 

 States and southern Canada. 



7a. Dipogon {Deuteragenia) sayi sayi Banks 



Plate 1, figure 9 



Dipogon sayi Banks, 1941, Canadian Ent., vol. 73, p. 122, [cf,9]. Lectotype: 

 9, Falls Church, Va., July 24, N. Banks (Cambridge). 



Male: Forewing with a narrow fuscous band along the basal vein 

 and nervulus and a large fuscous area beyond the stigma; apical 

 margin of forewing and apical part of hind wing weakly infuscate. 



Female: Fuscous bands on forewing narrower and more sharply 

 defined than in the subspecies nigrior, the basal transverse band 

 narrowed at its hind end and occupying only about 0.3 of the first 

 brachial cell, the apical band occupying about 0.6 of the second 

 discoidal cell. 



Specimens (34 d^, 1639): From Connecticut (Colebrook, East Had- 

 dam, East Hartford, Lyme, New Haven, and Wallingford) ; District 



