501. 
92 
B. crepuscularia, Hb. = biundularia, Esp. 
In 1896 and 1897 a great controversy was waged in the 
Entomological Magazines as to whether the so-called 
crepuscularia and biundularia of the old lists were two 
distinct species, or whether each were only local forms 
of the same species. The conclusion generally arrived 
at was that in one there were two broods each season, 
and in the other a single brood. The prior name of 
bistortata, Goeze, has now been generally adopted for 
the double-brooded species, and crepuscularia ( = biun- 
dularia) for the single-brooded. 
It is probable that all the records in this district, 
under the head of crepuscularia, are correctly given in 
accordance with this nomenclature (crepuscularia = 
biundularia), though Major Bland states that both species 
occur in the Conway Valley. Miss Perkins records 
crepuscularia as common at Bettws-y-Coed, and Mr. W. 
Gardner at Conway. 
501a. 5, ab. defessaria, Frr. = delamerensis, B. White. 
502. 
Most of the collectors in the district have taken this 
form commonly at Delamere Forest and district, where 
the insect varies from a speckly light-grey colour to a 
dark-soot; but almost invariably there is a distinct 
lighter waved line just before, and parallel with, the 
hind margin of the forewings. So far as has been 
ascertained the species at Delamere is single-brooded, 
although the perfect insect appears as early as March 
in some years. 
B. consonaria, Hb. The only record is: 
C.—‘‘ Upton, near Birkenhead, a single specimen 
only” (C. S. Gregson in £.Z.) 
503. B. punctularia, Hb. Rare and local. 
C.—East Cheshire, on the authority of N. Greening 
(W.L.); Pettypool Wood, May 1851 (N. Cooke in 
Zoologist, Vol. X., p. 3517); Delamere and Bramall 
(2) 
GNOPHOS, Tr. 
504. G. obscuraria, Hb. Occurs locally in all the counties. 
Confined to the vicinity of the coast in Cheshire. 
C.—Wallasey, Bidston, Tranmere, and Burton(W.Z.); 
Heswall, Thurstaston, Bidston, and Storeton, on heather 
(W.G.); always s., Flaybricks, Bidston, larva and imago 
(Pr.); near Prenton (Z#.Z.) 
F.—Ysceifiog (W.Z.); The Leet (A.); Llanferris (B.) 
D.—Ruthin (W.G.); Llangollen (B.) 
