184 THE ENTOMOLOGIST. 
grey and 7’. biundularia a white ground colour. I do not exactly 
understand the sentence, ‘‘ It is not fair to pick them out,” &c., 
nor what it is intended to convey. If Mr. Harrison has com- 
menced a kind of sorting process of the Barnsley specimens I 
do not wonder he gets mixed up, as there seems little doubt that 
there is only one species obtainable there, endless as the varieties 
may be. Concerning the ‘ black varieties” of J’. crepuscularia, 
it is quite possible, and does not disprove what I suggested, that 
the varieties of this species are generally suffused with brown. 
To my mind it is possible to have a variety of any species, 
suffused to any degree with any of the colours present in the 
type. Black is present in typical 7’. crepuscularia, and hence 
this colour may be so developed to the exclusion of the others 
that a ‘black variety” is the result. But in 7’. crepuscularia 
the prevailing colour is brown, and varieties, principally brown 
in colour, are common; in J’. biundularia the brown scales are 
but slightly developed, and give way to the white and black, and 
hence in this species black and dark grey specimens abound. 
When I wrote my last notes it was with the hope that our 
entomologists would take into account the time at which their 
specimens were obtained, and so give those to whom they sent 
their duplicates a better chance of a correct determination. 
Sending away doubtful specimens under a certain name without 
any explanation as to date, &c., means that the name will be 
accepted in many cases, and thus only makes a bad muddle 
worse.—J. W. Tutt; Rayleigh Villa, Westcombe Park, Black- 
heath, S.E., June 16, 1886. 
THe TrpHrosta Discussion.—Apropos of the discussion 
relative to the distinctness of Tephrosia biundularia and 
T. crepuscularia, when a youth, residing in Lancashire, I 
remember that the older entomologists used to speak with 
pride upon the capture in Delemere Forest, in Cheshire, of 
an occasional black Tephrosia biundularia. At that time, say 
about 1857, or a year or two earlier, these suffused specimens 
were rare among the common light form, eagerly sought after, 
and even commanded high prices. They, however, became yearly 
more frequent; and when I last visited that fine collecting-ground 
the typical (?) or light-coloured form were comparatively rare, and 
there were plenty of dark forms. This was about 1873. Perhaps 
