1867. 
39 
But there was no plant lost to the neighbourhood by the drainage ; the Ewpatorium 
is especially abundant in other localities, but microdactyUs is its only plumed 
inhabitant. The figure in Wood's Index was published before ever we knew of 
this locality, and I know nothing of the Orkney habitat recorded in the Manual. 
It may be suspected, however, that isodactyUs might be found in many other spots 
in South Devon if thoroughly searched for.— R. C. B. Jordan, Birmingham. 
Larva, of PteropJwrus isodadylus. — This larva has been discovered near 
Rotterdam by M. Snellen von Vollenhoven. It feeds in the stems of Senecio 
nemorensis. Several bred specimens of the perfect insect have been submitted to 
Professr Zeller, so that there can be no question of the identity of the species. — 
H. T. Stainton, Mountsfield, Lewisham, S.E., May 2Zrd, 1867. 
The Irish locality for Pteroplwrus isodacUjlus. — At the request of Dr. Jordan, 
I add to his communication a notice of the Irish locality for Pterophorus isodactylus. 
It occm-s abundantly in July and August, on the bog which lies between the 
Town Lodge and the precipitous base of Cromaghlan Mountain, near Killarney. 
The moth appears to be confined to the dry and somewhat elevated margin of 
the bog, and my attention was first attracted to the insect by disturbing it in 
gathering a handful from a magnificent clump of the white variety of Calluna 
vulgaris. 1 have not been on the ground since, and can throw no light on the 
food-plant of the larva. 
I doubt, however, its being attached to any bog plant, as I did not see a 
specimen except at the elevated bank amongst the ling. 
The date of the last capture was August 10th. 
At the western end of this bog is an oak copse, which Bouchard pointed out 
to me as the place where he had taken Ophiodes limaris at sugar. — Edwin 
BiKCHALL, Bradford, May ISth, 1867. 
Further notes on the larva of Pterophorus hieracii. — I was again at our forest 
on Saturday last, and at first had some trouble in finding the larvas of Ft. hieracii ; 
bat I soon found out how they feed. 
When I fij-st found them they had not changed their first skins, and were 
sitting on the top of the leaves. After the first moult, they at once go down the 
stem until they get to within about an inch and a-half of the bottom, and then eat 
the stem just half way through, causing the parts of the plant above where it is 
bitten to bend down, and soon to become half dead and very soft ; on this part the 
larva feeds, and as the plant getting only a small supply of sap is not able to grow 
up, the neighbouring plants, in two or three days, overtop' it and cover it up, so 
that one cannot see it till one looks well for it under the other plants. 
One plant supplies food enough for a single larva ; for as soon as the bent part 
is eaten the larva is full fed, and it then descends to just below where it had bitten 
the stem half through, which is very short and stiff, and attaches itself by the tail, 
and changes to pupa with its head downwards. 
It will be perceived what a clever little fellow this larva is ; for, in the first 
place, by stopping the growth of the food-plant, and allowing the neighbouring 
