230 
BUFF ARCHES. 
Thyatira Derosa, 
PLATE XXIII. Fig. 3. 
Phal. Noctua Derasa, Lim. ; Don, vii. PI. 223, fig. I. — Noctua 
derasina, Hau-orOi Buff Arclies, ^¥ilkes, Harris. — Thya- 
tira Deraea, Ochsen, Steph, 
About the size of the preceding, or a little larger ; 
the prevailing colour light yellowish-brown ; the 
upper wings with two white oblique hands, one of 
them extending from the tip to the inner mar^n, 
the other continued from the inner margin to the 
anterior one, and terminating not far from the base, 
the space between it and the base generally more 
or less denuded of scales. The triangular space 
between the two bands is clouded with brown and 
white, and there is a transverse series of several 
parallel fine browm zigzag lines, forming very acute 
angles on a whitish grormd ; the hinder margin of 
the wing brown, udth two rows of small white 
arches, surmoimted by a w’hite iU defined line ; the 
fringe likewise whitish. The hinder wings are some- 
what dusky with a slight ochreous tinge, the fringe 
white. 
