82 U.S. NATIONAL MUSEUM BULLETIN 244 



third of antenna; shaft, branches sparsely covered with very slender, 

 almost hahlike, scales, closely appressed; sensory hairs very fine, 

 erect, arranged in definite rows. Legs (fig. 177) somewhat similar 

 in size, hindlegs smallest; first tarsal segment longer in forelegs than 

 in posterior pairs. Foretibia with or without epiphysis. Meso- 

 and metathoracic tibia without spurs. 



Wings (fig. 161) broad, translucent, evenly, thinly covered with 

 long, sharply acute, hairlike scales, giving wings a light fuscous to 

 greyish color; apices of both wings evenly rounded; 11 and 7 veined, 

 Ml absent, base of M undivided within cell of both wings. Primaries 

 R3 and 4 stalked, R5 connate at base or separate; M2 and 3 separate; 

 lA sometimes with base partly atrophied, curving down to fuse with 

 2A; 2A and 3A separate at wing base, uniting for short distance, 

 finally separating, 2 A joining lA, 3 A continuing toward hind margin. 

 Secondaries with oblique vein connecting base of Sc and Rs; M2 

 connate or separate. 



Male genitalia. — ^Very broad, relatively short. Apex of tegumen 

 rounded, entire. Valves with pulvilli moderately developed; apex of 

 sacculus with few to several minute spines. Vinculum broader than 

 long, constricting abruptly to form relatively short saccus. Aedeagus 

 simple and stout. Eighth sternite broader than long; furcations 

 parallel or shghtly divergent, usually longer than undivided base. 



Female. — Vermiform; all appendages of body vestigial; dorsum 

 of head and thorax darldy sclerotized, remainder of body wall mem- 

 branous; posterior end of abdomen with dense encirclement of hairs. 



Female genitalia. — (Fig. 304.) External genitaha wealdy sclero- 

 tized, mostly membranous, two pairs of sclerotized areas, inner pair 

 tapering anteriorally into abdomen as apophyses. Internal genitaha 

 with ductus seminalis very short, less than K length of prominent 

 spermatheca; accessory glands large, irregularly forked; bursa copu- 

 latrix rather small, approximately equallmg spermatheca in volume. 



Key to the Species of Hyaloscotes 



la. Wing expanse 26-30 mm.; foretibia with slender epiphysis . 29. II. fumosa 

 lb. Wing expanse 18-22 mm.; foretibia unarmed .... 30. H. pithopoera 



29. Hyaloscotes fumosa Butler 



Figures 27, 177, 209, 271, 271a, 351, 376; Map 4 



Hyaloscotes fumosa Butler, Ann. Mag. Nat. Hist., vol. 8, p. 314, 1881.— Kirby, 

 Cat. Lep. Heter., vol. 1, p. 290, 1892. — Neumoegen and Dyar, Journ. 

 N.Y. Ent. Soc, vol. 1, p. 114, 1893.— Dyar, U.S. Nat. Mus. Bull. 52, no. 

 4073, 1902 [1903]; Inscc. Inscit. Menst., vol. 11, p. 3, 1923.— Jones, Ent. 

 News, vol. 36, p. 163, pi. 4, 1925. — Dalla Torre and Strand, Lep. Cat., 

 pars 34, p. 197, 1929. — McDunnough, Check List Lep. Canada and USA, 

 pt. 2, p. 103, 1939 (synonym of H. fragmentella Henry Edwards). 



