THE ENTOMOLOGIST’S 
WEEKLY INTELLIGENCER. 
No. 154.] SATURDAY, SEPTEMBER 10, 1859 [Price Id. 
THE BKITISH ASSOCIATION. 
Before we next address our readers 
the British Association will have com- 
menced its labours at Aberdeen. What 
effect the ensuing Meeting will have 
on the furtherance of entomological 
Science on the banks of the Dee re- 
mains yet to be seen. We believe that 
Polyommatus Artaxerxes is particularly 
desirous that something should be uiged 
on its behalf. Does any advocate hold 
a brief for it? The insect being com- 
mon near Aberdeen, and the interest 
relating to the species having been on 
the increase . for a number of years 
seem to render it desirable that the 
opportunity should be taken of re- 
cording the latest observations and de- 
ductions with reference to its identity 
with Polyommatus Agestis. 
While alluding to this insect, it may 
be as well to take this opportunity of 
stating that at Northam Burrows, near 
Bideford, P. Agestis is abundant, though 
not a plant of Helianthemum is to be 
found for miles: it is scarcely neces- 
sary to observe that the Eroclium 
abounds on the sand-hills. We leave 
our readers to draw what inference 
they like. 
The high northern latitude of Aber- 
deen leads one to hope that some 
entomologist will favour section D with 
some observations on the influence of 
climate on the variation of species. 
The Scotch Eggar, by some considered 
distinct from our Southern Lasiocampa 
Quercus, would form a noble subject 
for an interesting Memoir, and the fact 
of the insect ordinarily requiring two 
years to attain the perfect state should 
suggest some instructive remarks on 
the double-broodedness of species being 
a variable quality according to the 
influence of climate. 
It has been observed by Dr. Speyer, 
in the ‘ Entomologische Zeitung ’ for 
1850, that “the short summer of high 
mountains may only permit of one 
brood in the year; but at what alti- 
tude double-broods disappear we do not 
know. It is not improbable that, be- 
sides the effect of the Alps and of the 
higher mountains in this respect, a 
difference may prevail in Germany be- 
tween the North and the South, and 
that species which in Prussia and Po- 
merania are only single-brooded may 
be double-brooded in more southern 
localities, or at least occasionally so.” 
It is a well-known fact that many 
insects double-brooded in the South of 
England are only single-brooded in 
Scotland. 
2 B 
