59 
rather more smoothly clothed and the thoracic tufting is obsolescent. The 
genitalia show the diamond-shaped uncus with blunter tip; the harpe is 
longer and sinuate, a distinct editum is present, the apex of clasper is more 
or less emarginate, and the armature of the vesica consists of a short bulbed 
cornutus. The writer is inclined to think that the two groups , 'may not 
be so closely related as the superficial resemblance of the species would 
appear to indicate. 
Anomogyna Staud. 
1871, Cat. Pal. Lep. 110 (type, laetabilis Zett.). 
Pteroscia Morrison, 1874, Proc. Bost. Soc. Nat. Hist. XVII, 155 (type, atrata Morr.). 
Platagrotis Smith, 1890, Bull. 38, U. S. N. M. 9 (type, speciosa Hbn.). 
Eyes naked. Palpi upturned, third joint long and rather pointed; 
second joint with rough fringe of hair beneath, with tendency to form a 
slight pointed apical tuft; third joint smooth-scaled. Front smooths Male 
antennse typically ciliate, at times serrate and fasciculate or bipectinate. 
Mid and hind tibiae spined; fore tibia longer than first tarsal joint with 
spining generally consisting of one or two weak apical spines hidden in 
vestiture, or entirely unspined, occasionally ( Pteroscia ) with almost a 
comp ete row of weak inner spines; a strong hair fringe on outer side. 
Thoracic vestiture variable, normally of mixed scales and hair, occasionally 
entirely hairy; tufting quite evident, except in the hairier species. 
Figure 39. Male genitalia of Anomogyna laetabilis Zett. 
Male Genitalia. Clasper narrow, with either rounded or emarginate 
apex and no corona; pollex present, mostly well developed and frequently 
forming the lower edge of the emargination; harpe recurved, on a distinct 
foot-like attachment, either short and broad, scarcely projecting over costa, 
or narrower and projecting. Sacculus usually well developed and pro- 
jecting over costa at base, parti}' concealing a weak editum. Clavus absent. 
Juxta rather weak. Uncus of variable width. Aedoeagus generally 
scobinate or dentate apically. 
The writer has been unable to find any characters which would permit 
of the retention of the above three generic names. It was hoped that the 
heavier spining of the fore tibia of atrata could be used to save Pteroscia, 
