﻿AN .ADDITION TO THE PliUSIlDiE OF BRITAIN. 287 



My objection, then, to Wallace's treatment would be that he 

 has taken no cognizance of these absorption (and reflected) 

 colours ; whereas it appears to me possible to interpret a large 

 number of my experimental results only on the assumption that 

 many colours are due to " absorption," and belong to Class 2 c. 

 And in thus speaking I have especially in view the very 

 " unsatisfactory " (to repeat my previous designation) colours 

 — black, brown, grey, and such like. For the rest, reflection 

 colours (Class 2 b) will, as already pointed out, include all the 

 whites and silvers, and metallic colours generally. Class 2 a 

 (interference colours) includes some blues, metallic greens, &c. 

 Reds are entirely pigment colours ; so probably are yellows, 

 though we have some knotty points to settle here, as will have 

 been observed, no doubt, by any of my readers that have 

 examined in detail the tables of results. Greens, too, and 

 chestnuts, and (some ?) blues, are also pigment colours. 



(To be continued.) 



AN ADDITION TO THE PLUSIID^ OF BBITAIN. 

 By Kichard South. 

 (Plate III. fig. 6.) 



Plusia moneta. 

 Noctua moneta, Fabr. Mant. Ins. ii. 162; Hiibn. Eur. 



Schmett. fig. 289 ; Dup. Lep. Fr. vii. pi. 139, fig. 2 ; Frey. 



Beit. ii. pi. 71. 

 Noctua flavago (Argyritis, text), Esp. Schmett. iv. 218, pi. 112, 



fig. 1. 

 Noctua napelli, Vill. Ent. Linn. p. 347, pi. v. fig. 21. 

 Polychrysia moneta, Hiibn. Verz. Schmett. p. 251, No. 2492. 

 Plusia moneta, Treit. Schmett. v. 3, 158 ; Guen. Noct. ii. p. 



332, No. 1146 ; Walk. Cat. Lep. Het. p. 889; Staud. Cat. 



p. 125, No. 1764; Kirby, Eur. Butt. & Moths, p. 261; 



Hofin. Gross. -Schmett. Eur. p. 111. 



Expanse, 1 in. 9 lines. Fore wings pale golden tinged with grey ; trans- 

 verse lines and venation on the disc, brown ; the costal half of central third 

 suffused with brown ; first line double, curved and indented at the median 

 nervure, second line starts obliquely from the costa, then turns inwards and 

 forms a series of curves to the inner margin ; between these lines is a narrow 

 brown band which is angulated at the 2nd median nervule ; before the apex is 

 a brown oblique streak from costa to outer margin, where it terminates in a 

 broader longitudinal dash of the same colour ; below this brown dash is a 

 broad stripe of pale brown, with a few black dots between the nervules ; 

 beyond, the outer margin is tinged with violet. In the central area is a 

 silvery ring, separated by the median nervure from a larger curved mark of 

 the same colour ; this last is intersected by the 1st median nervule, and both 

 have a yellowish tinge. Hind wings pale brown, suffused with fuscous, 



