THE ENTOMOLOGIST. 293 
later period when, as an angler, frequenting the Bolton and 
Bury canal, heath grew on the off-side of the canal, above 
Holker’s Bank, the other locality where this pug larva is 
taken. At the present time, what with coal mines, chemical 
works, &c., the heath appears to be entirely destroyed. Is it 
not just possible that Minutata, finding its natural food-plant 
diminishing, has taken to Knautia arvensis, and, by so doing, 
has produced itself in a more enlarged form? It would be 
worth the trial to feed the heath Minutata from the egg on K. 
arvensis, and note the result. In referring to my diary I find, 
on October 2nd, 1870, when on a visit to Bolton, my friend 
Mr. Porter told me of this larva, and we went and found it in 
abundance. I have taken it since; but not this season.— 
Wm. Johnson; 66, Upper Warwick Street, Park Road, 
Liverpool, November 29, 1874. 
[I greatly desire the addition of a new British species to 
the interesting genus Eupithecia; but I cannot think that 
Mr. Gregson has published any characters in the ‘ Entomo- 
logist’ which will induce his readers to admit E. Knautiata 
as being so. If Mr. Gregson will kindly send me for publi- 
cation a specific description, and append a memorandum 
contrasting the species, or, as I should say, differentiating it 
from the most nearly-allied species, he will be doing a real 
service to Entomology. I have received Mr. Gregson’s 
second letter on the subject, but this does not seem to meet 
the case. JI am unable to find any distinctive character in 
what he has hitherto written; but I confess this may be 
owing to my imperfect knowledge of the genus.—Edward 
Newman.} : 
Unusual appearance of Cidaria Silaceata.—On the 10th 
of December (weather being frosty) I was surprised to see a 
fine female specimen of this moth in my breeding-cage, 
reared from a larva obtained in the autumn. The cage stood 
in a natural temperature; and having expected Pecilocampa 
Populi to make its appearance I had been looking in the cage 
daily, so that there can be no mistake about the time of 
appearance of C. Silaceata.—F. O. Standish; 402, High 
Street, Cheltenham, December, 1874. 
Economy of Anarta Myrtilli (Entom. vii. 178).—On Shirley 
Heath, where, in former years, I have spent three or four 
hours at a time in August and September hunting for the 
