THE WEEKLY ENTOMOLOGIST. 
179 
OBSERVATIONS. 
Lepidopteea. 
Occurrence of Eup. arceuthata, 
Frey, in Great Britain . — I have for 
three successive Autumns taken the 
larva of this insect on wild juniper, in 
Buckinghamshire, and have, for two 
summers had the perfect insect. 
When I first found the larva in 1860, 
I fancied it must be Eup. Eelveticata 
Bdv, I was then imperfectly ac- 
quainted with the larva of the latter 
moth. In May, 1861, the perfect 
insects appeared, and I was surprised 
to see a large leaden -looking Pug, 
very different to any specimen of 
Eelveticata I had seen. I felt per- 
suaded I had a species new to our 
British list, and determined to set 
the matter at rest. During the 
Spring of 1862, I had an opportu- 
nity of sending a pair of the perfect 
Insect to Prof. Zeller of Meseritz. 
He at once informed me they were 
Eup. arceuthata~Frey , a species which 
he was in the habit of breeding freely 
at Meseritz. He added however that 
he was inclined to consider this insect 
and E. Eelveticata Bdv. the latter 
the Northern and the former the 
Southern variety of the same species. 
He was not, however, acquainted 
with the larva of Eelveticata. In 
this opinion Mr. Doubleday and Mr. 
Bond, were inclined to concur, but 
they like M. Zeller, were not ac- 
quainted with the caterpillar. M. 
Zeller very kindly sent me a set of 
bred specimens of E. arceuthata. 
which were precisely identical with 
those I had bred in Buckinghamshire. 
I determined to pursue further re- 
searches. During the past summer I 
succeeded in getting impregnated ova 
of E. arceuthata. These I distribu- 
ted among different friends. Mr. 
Hellins, Mr. Greene, and myself 
succeeded in rearing a few. Early 
in the autumn Mr. Wilson, of Edin- 
burgh very kindly sent me some 
living larvae of the true Eelveticata 
taken by himself on the Pentland 
Hills. I at once detected what ap- 
peared to me to be an unvarying 
distinction between the two larvae. 
Through the kindness of my friend 
Mr. Buckler of Emsworth I secured 
most exquisitely life-like drawings 
of each. I showed them to Mr. 
Doubleday and Mr. Bond, who at 
once expressed their conviction that 
the species might probably prove to 
be quite distinct. I have little doubt 
on the subject myself : at any rate I 
am sure that Dr. Staudinger has been 
premature in amalgamating them in 
his lately published catalogue of 
European Lepidoptera. I subjoin 
discriptions of the larva of each 
species. 
Lakva of Eup. abceuthata Feet. 
Stout and plump. Some thickness 
from head to tail. Nearly a quarter 
larger than the larva of Eelveticata. 
ground colour grass green. Central 
dorsal line dark green. Subdorsal 
lines pale yellow or yellowish white. 
Spiracular line white or yellowish. 
Segmental divisions yellow. Head 
somewhat bifid, when at rest curved 
highly inwards, colour invariably 
