210 THE PEOCEEDINGS OF THE LINNEAN SOCIETY 



one side, apex simple. Maxillary palpi short, filiform. Labial 

 palpi moderate, ascending, cylindrical. Tongue long, scaled at 

 base. Forewings dilated : hind wings moderately broad. 



Only one other species of this genus is known, from India ; it 

 does not closely resemble the Australian one. 



Cer. ahnella n. sp. 



11" — 12". Head, palpi, and thorax slaty-whitish, densely ir- 

 rorated with slaty-fuscous. Antennae dark fuscous. Abdomen 

 slaty-whitish, densely mixed with fuscous, in J" more blackish, 

 with segmental margins pale ochreous ; in both sexes on poste- 

 rior margin of basal segment are two ochreous valve-like projec- 

 tions, ending in(;^iu a long, in ? in a short tuft of scales, one on 

 each side of back, beneath which is in ^J a large, in $ a small ex- 

 cavation or orifice in side of abdomen. Anterior legs pale slaty- 

 grey, irrorated with dark fuscous, in (^ internally black, with pale 

 rings at apex of joints of tarsi ; middle and posterior legs slaty- 

 whitish, irrorated with slaty-fuscous, with a strong oblique black 

 band at one-third before apex of tibiae, and joints of tarsi black 

 at base. Forewings rather strongly dilated, hindmargin scarcely 

 oblique, rounded ; slaty- whitish, very densely irrorated with 

 slaty-fuscous ; a strong black nearly straight oblique transverse 

 line near base from costa to inner margin ; first line double, 

 strong, black, from hardly beyond one-third of costa to before 

 middle of inner margin, slightly angulated outwards a little be- 

 low costa, lower half of its inner margin marked by a strong 

 ridge of raised scales ; second line double, black, faintly waved, 

 from just before apex to just before anal angle, making a rather 

 strong curved projection inwards below costa, and a rather indis- 

 tinct sharply-acute angulation inwards above inner margin ; half- 

 way between first and second lines above middle of disc a trans- 

 verse elongate-linear raised black mark, behind and beneath 

 which is an indistinct blackish cloud, sometimes produced be- 

 neath to lower extremity of first line ; hind marginal line strong, 

 black, broken by very small slaty-whitish spots about veins : 

 cilia grey, intersected by a strong line of slaty-whitish scales 

 before middle, and with tips and two lines of points before tips 



