DICHROMA. 245 



with black scales ; the costa of the fore-wings is also white. At the 

 base of the fore-wings are two divergent white bars, the anterior 

 of which is deeply forked ; the upper bar of the fork is short, 

 and beyond it is an elongated mark ; across the central area 

 of the wings are four obliquely placed oval white spots, the 

 highest of which is double ; then follows a white sub-marginal 

 line, interrupted in the middle, with several straight white lines 

 running from it to the hind margin. The hind-wings and 

 abdomen are silvery-white, slightly shaded with brown. 



DICHROMA ARCUALIS. 

 {Plate CL., Fig. 3.) 



Dirhroma arcualts, Westwood in Jardine's Nat. Libr. Exot. 



Moths, p. 228, pi. 30, fig. 3 (1841)^ Walker, List Lepid. 



Ins. Brit. Mus. xxiv. p. 1147, '^o- 5 (1862). 

 Argyrophora arcuaria, Guenee, Spec. Gen. Lepid. Uran. et 



Phal. ii. p. 232 (1857). 



This, like the preceeding species, is also a native of the 

 Cape It expands an inch. 



The fore-wings are of a rather pale brown, varied with 

 white markings. Close to the base is a strongly furcate mark, 

 the anterior branch of which is dilated ; parallel to the inner 

 margin is a slender white line, which is connected near the 

 middle of the wing with a series of white crcscentic marks, 

 placed obliquely, and extending upwards as far as the middle 

 of the wing, above which is a clavate spot. Beyond this, and 

 running obliquely to the apex of the wing, is a strongly 

 dentated white line; and there is a festooned sub-marginal 

 line gradually diminishing above, and ceasing before the apex. 

 The hind-wings and abdomen are white, slightly tinged with 

 brown. 



