BY E. MEYRICK. 1135 



var. a. Base of hindwings and of abdomen rosy. 



var. /3. Forewings and hindwings rosy-ochreous ; streaks silvery- 

 white, broadly margined with fuscous ; labyrinthine marks obsolete. 



Newcastle and Blackheath, New South Wales; Melbourne, 

 Warragul, and Fernshaw, Victoria ; fifteen specimens. The 

 larva feeds underground on the roots of trees. The imago is 

 exceedingly variable, no two being alike. 



8. Trictena, n.g. 



Antennae J, in ^ tripectinated throughout. Palpi moderate, 

 straight, porrected, basal joint shortly rough-scaled beneath, 

 second and third terminal joints smooth, terminal joint half 

 second, clavate. Posterior tibiae densely rough-haired. Fore- 

 wings with vein 7 from angle, 8 from much before angle, 9 and 

 10 stalked from near 8. Hindwings as in forewings. 



Characterised by the singular tripectinate antennae, which are, 

 so far as I know, unique. The imago is of ponderous build ; it 

 may be regarded as a development of the preceding genus. 



25. TricL labyrinthica, Don. 



• V 



(Cosaus lahyrinthicus, Don. Ins. IST. Holl. ; C. argenteios^ ib., 

 HS. Lep. Exot. I. 47, 48 ; Pielus lahyrhithicus, Walk. Bomb. 

 1578 ; P. atri/palpis^ ib. 1577 ; P. hydrographus, Feld. pi. 

 LXXX. 3.) 



^9. 100-188 mm. Head, thorax, and abdomen dark fuscous. 

 Antennae light ferruginous. Forewings elongate-triangular, costa 

 posteriorly moderately arched, apex obtuse, hindmargin oblique, 

 slightly sinuate, rounded beneath continuously with inner margin ; 

 dark fuscous, more or less marked with irregular parallel lighter 

 and darker labyrinthine lines, tending to enclose irregular con- 

 centric rings, especially towards hindmargin, where they are some- 

 times whitish-centered : a very irregular-edged rather broad white 

 longitudinal streak in disc from near base to before §, posteriorly 

 generally emitting three or four short teeth ; sometimes several 

 small scattered white spots in disc beyond apex of this ; a slightly 



