578 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



2. Labial palpi elongate, extending almost to posterior margin of thorax; antennae 



with pectinations wider at bases than outwardly. 



macrogaster (Walsingham) 



Labial palpi of intermediate length, extending only onto anterior margin of 



thorax; antennae with pectinations narrower at bases than outwardly. 



bipectinicornus, new subspecies 



3. Antennae unipectinate unipectinicornus, new subspecies 



Antennae laminate laminicornus, new subspecies 



15a. Acrolophus macrogaster macrogaster (Walsingham), new combination 



Anaphora macrogaster Walsingham, 1887, Trans. Ent. Soc. London, p. 165, 



pi. 8, figs. 19, 19a, June. — Smith, 1891, List Lep. Bor. Amer., p. 95, no. 



5063.— Dyar, 1900, Can. Ent., vol. 32, no. 11, p. 327; 1903, List North Amer. 



Lep., p. 579, no. 6596. 

 Acrolophus macrogaster Barnes & McDunnough, 1917, Check List Lep. Bor. 



Amer., p. 191, no. 8187.— McDunnough, 1939, Check List Lep. Can. & U.S. 



Amer., p. 103, no. 9577. 



Walsingham 's original description of macrogaster is quoted as 

 follows : 



Anaphora macrogaster — Labial palpi, cf, recurved, reaching nearly to the 

 posterior edge of the thorax; 9 erect, reaching somewhat above the elongate 

 basal joint of the antennae. Antennae cf, bipectinate, the pectinations wider 

 at their bases than outwardly, fringed with short hairs; subochreous; ? simple. 

 Head, thorax, and palpi mottled greyish and brownish fuscous. Fore wings 

 brownish fuscous, slightly mottled with paler along the costal and apical margins ; 

 with an elongate patch of dull whitish running irregularly along the length of 

 the fold; a smaller spot of the same colour immediately beyond the outer end of 

 the cell. Hind wings brown; the fringes scarcely paler. Abdomen the same 

 colour as the hind wings, that of the male about 7 mm., of female 10 mm.; the 

 lateral claspers of the male spoon-shaped, scarcely inverted, dilated outwardly, 

 but tapering slightly upwards and rounded at the apex; uncus double, the points 

 parallel and somewhat closely approximate. Exp. al. cf, 22 mm.; 9 , 29 mm. 



Three males and three females from Arizona, collected by Morrison. 



Male genitalia essentially the same as those of laminicornus, described 

 below. 



Remarks. — Walsingham's illustrations consisted of: figure 19 the 

 adult 9, dorsal aspect, in color; and figure 19a the cf genitalia — the 

 uncus and cucullus in lateral aspect and the uncus in dorsal aspect. 

 The type material, including both cf cf and 99, is in the British 

 Museum (Natural History). Mr. Tams of that institution has sent 

 photographs, labeled "macrogaster Wals., type," showing an adult cf 

 and 9 and theu' genitalia. These, along with the original descrip- 

 tion, furnish a reasonably complete conception for macrogaster. 

 Although I have never seen a specimen completely agi^eeing with this 

 conception, I am considering this subspecies valid because its geni- 

 talia are apparently the same as those of the following three sub- 

 species, which may be distinguished from one another, as well as from 



