214 NOCTUID®. 
slightly defined by fuscous and with raised scales on its inner edge ; 
medial line dark, excurved below costa, then oblique and minutely 
waved ; postmedial line indistinct, dark, bent outwards below costa, 
then minutely waved, slightly incurved at discal fold, incurved 
below vein 4, some whitish points beyond it on costa, subterminal 
line greyish defined on outer side by fuscous, slightly excurved 
below vein 7 and at middle; a terminal series of black striz. 
Hind wing fuscous brown, the cilia whitish at tips; the underside 
valer. 
Ab. 1. Fore wing with the area between the antemedial and 
medial lines blackish. 
Hab. Sixcavors (Ridley), 3 ¢,6 9 type. Hep, 24-26 millim. 
*6469. Gyrtona erebenna. (Plate CLXXIX. fig. 29.) 
Gyrtona erebenna, Mab. Aun. Soc. Ent. Fr. 1899, p. 731. 
3. Head, thorax, and abdomen grey mixed with some brown ; 
palpi rather darker at sides. Fore wing grey; a subbasal brown 
band with waved outer edge; an indistinct antemedial line angled 
outwards on median nervure; a slight waved medial line angled 
outwards on median nervyure and with brownish band beyond it ; 
two slight discoidal points ; an indistinct diffused brown postmedial 
band, bent outwards below costa, excurved to vein 4, then oblique ; 
the terminal area fuscous brown with traces of a dentate grey 
subterminal line and waved terminal line enclosing a series of dark 
points. Hind wing grey suffused with fuscous brown. 
Hab. Mavscascar, Baie d’Antongil, type t ¢ in Coll, Mabille, 
Evp. 14 millim. 
b, Antenne of male minutely ciliated. 
a‘, Fore wing with dentate white subapical mark ......... nama, 
}‘, Fore wing without dentate white subapical mark. 
a. Hind wing semibyaline white, the terminal area 
fuscous brown. 
a®, Fore wing with the postmedial line imcurved 
below ein As. ccresse-seects sgoccece ceec omen aceaereees exsiccd. 
3’, Fore wing with the postmedial line oblique from 
below, costa) toinwier marein' \.ccc.ss0cessteeessrase ochreographa, 
ce’, Fore wing with erect postmedial band slightly 
Oxculved ab mcd lopeesacesece estas taaceana etree: pheozona. 
}°, Hind wing nearly uniform fuscous brown. 
a3, Fore wing with the postmedial line slightly 
incurved below costa and excurved at middle... divitalis, 
4°, Fore wing with the postmedial line bent outwards 
below costa and incurved or oblique below 
vein 4. 
a. Fore wing with the antemedial line curved. 
a, Fore wing suffused with silvery scales......... plumbisparsa, 
}®, Fore wing not suffused with silvery scales... polionota. 
b’, Fore wing with the antemedial line slightly 
angled outwards below costa, then oblique ... provimalis. 
c*, Fore wing with the antemedial line very ob- 
liqnely excurved from costa to just below the 
cell, then oblique <..5...c..es0cs07 F COROOAEEDIOOSO. atribasalis. 
