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ACIDALIA HOLOSERICARIA. 
Plate XXIII. Figure 15. 
This insect measures from a little under to a little over 
three quarters of an inch in width. 
Male: fore wings pale dull yellowish, darkest on the 
upper margin. The first line is grey and waved; second 
line also grey and waved; third line grey, followed by 
another band of the same ; central shade a line of grey; 
central spot blackish, but seldom occurring. 
The perfect insect appears in July. 
Localities for this species are near Bristol. 
ACIDALIA INCANARIA. 
SMALL DUSTY WAVE. 
Plate XXIII. Figure 16. 
This insect measures from a little under to a little 
over three quarters of an inch across, generally the former 
size. 
Male: front wings whitish frosted with grey. The first 
line, faintly visible, is dark grey and curved; second line 
indicated by a row of dark grey dots; central spot very 
small and greyish-black; the outer margin dusky, extending 
a little way round the upper margin. Hind wings also 
greyish-white, with a faint dotted line near the inner 
corner, and two or three others within the outer margin ; 
central spot black; the outer margin also dusky, clouded 
