o .eg an Jo of En1tomol0lD' - Norsk entomologisk forening

Fig. 2. Trap model. (Copied from Bogenschiitz 1980).
TESTING THE METHOD IN 1980
In 1980 the traps were tested in 10 localities
(tab. I and fig. 1) from two ofwhich the Pine beauty
had been previously recorded.
(In both table 1 and 2, region and EIS grid no.
are in accordance with Strand (I 943) and Heath
(I 977), respectively).
The number of traps in each locality varied
between three and five (tab. 1). The distance between
traps was approximately 100 meters. The
traps were usually hung on branches of trees,
I.5- 2 meters above the ground.
P. jlammea was trapped in 8 of the 10 localities.
The results are listed in tab. 1 which also
shows the trapping periods.
As opposed to the negative results from the
• Fiskvik locality in Ytre Rendal one would have
expected the moth to be caught at the locality in
Lardal according to the formerly known distribution
of the Pine beauty. However, the negative
catches in Lardal can fle explained by the
fact that the atea was stocked by mainly spruce
forest.
Because the traps proved to be effective (tab.
I) and since the trapping method is simple it was
decided to organize a more extensive survey in
1981.
SURVEY 1981
a) Distribution and control of traps
Traps were placed in 29 localities in natural pine
forests (tab. 2 and fig. 1). Three of the localities
were the same ones as in 1980.
With a few exceptions (tab. 2) the number of
traps was five in each locality, the distance between
traps being approximately 100 meters.
The traps were set out when the daily maximum
temperature reached 14 - 15°C even if the
ground was partly snowcovered.
The first trap catches were collected one week
after the first moth was observed in the trap.
The sticky cardboard sheet with the moths was
then replaced with a new sheet, which remained
in the trap for the next two weeks. Then the
traps were taken down and the catches sent to
the institute for identification. - In some localities
this time-schedule was deviated from. However,
the rubber capsule dispensers are effective
for at least 6 weeks (Bogenschutz 1981), and
therefore the traps have functioned at least for a
part of the flight period.
b) Results
Tab. 2 shows the number of Pine beauty males
caught in the localities during the various trapping
periods. - It should also be mentioned that
in most localities the traps caught considerable
numbers of two other noctuids, Papestra biren
(Goeze) = (Mamestra glauca (Hubner» and Ort­
.'lOsia gothica (LJ
Largest number of P. biren in 5 traps was 58
from Hitra, while accordingly from Grue in
1980 the number was 77. Two specimens of
Orthosia miniosa (Denis & Schiffermuller) were
trapped at Trom0Y, the southernmost locality in
1980. In 1981, 8 specimens of Anarta myrtilli
(L.) were trapped at Kvernesmoen in Ytre Rendal.
COMMENTS
The trapping records show that P. jlammea in
Norway is more extensively distributed than
was formerly known.
Previously the northernmost record was from
Kvanne in M0re and Romsdal province (Mehl
I.e.), while now the moth has been shown to exist
at least 1 1/ 2 degree latitude further north,
near Namsos in Nord-Tf0ndelag province. It
should be noted that the records were negative
at the northernmost trapping sites, Saltdal and
MaIselv. Also in East-Norway the distribution
was extended northward from Elverum to
Kvernesmoen in Ytre Rendal. However, at
Kvernesmoen only one specimen was trapped,
and at Fiskvik and Engerdalssetra in the adjacent
districts the records were negative. This indicates
that there is a considerable reduction in
abundance between Elverum and Ytre Rendal/Engerdal,
possibly due to the increasing altitudes
towards the latter localities (tab. 2).
The survey did not aim at elucidating details
on the flight periods of P. jlammea. However,
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