THE ENTOMOLOGIST. 183 
thorax was quite rounded and smooth: memory, however, as 
we all know, is very treacherous, and specific differences can 
never reasonably be deduced therefrom. As far as I ob- 
served, the beetles confined themselves to the collecting of 
the pellets of rabbits’-dung, but this single observation 
cannot, I think, establish the fact of their invariably doing 
so. There seemed to be no other suitable material at hand 
for the purpose, and possibly what I saw was but an adapta- 
tion of a means to an end, since, as far as I could judge, the 
locality, and nature of the soil, &c., were peculiarly suited to 
the beetles’ requirements. ‘The depth of the tunnels excavated 
by these beetles were of comparatively considerable magni- 
tude, as I could probe many of them with a pliant stem of the 
common braken some ten or twelve inches, and, indeed, with 
the aid of my knife 1 enlarged some of them to an equal or 
even greater depth without finding traces of either beetles or 
‘ pellets—G. B. Corbin. 
[The beetle found by Mr. Corbin is Typhceus vulgaris.— 
Edward Newman. | 
The supposed Potato-bug.—Will you kindly inform me 
what the enclosed creatures are? ‘They were sent to me 
yesterday from Wimborne, where I am told they are doing 
some amount of damage to the potato crop, by destroying the 
haulm. I suppose it is the grub of some beetle, and I believe 
I have seen similar creatures not unfrequently before, yet I 
am unable to name it. Of course, everything in any form 
upon the potato cannot (in the eyes of the grower) be less 
than the “ Colorado potato-bug.”"—G. B. Corbin. 
[The chrysalides of Coccinella 7-punctata. I am quite at 
a loss to conceive what damage they can do, since in this 
state they do not feed at all: in the larval and perfect state 
their food is Aphides, or plant-lice—Hdward Newman. | 
G. Harvey.—The beetles are Coccinella septem-punctata: 
they feed on Aphides. They have no connection with the 
potato-bug.— Edward Newman. 
W. Macmillan.—The larva is that of Biston hirtaria. 
The ichneumon, Macrogaster alvearius, so-called from the 
resemblance of its mass of little cocoons to a honeycomb.— 
Id. 
Colonizing Glow-worms.—Can you tell me how we can 
establish a colony of glow-worms at Woodford? There are 
