Full-text - Norsk entomologisk forening

Nocturnal moths 179
Am/i. Norway 1971.
April May June July August September Oc tober Nov.
Ach 1,lIa ."-la'IJiaol'nis L.
Endromis 1JeI'siaolora L ..
Odontosia sie1Jersi Hen.
Epianaptera i UBila Ha L.
Pygaera aurtula L.
Saturnia patlo11ia L.
Odontosia car",e'lita Esp.
Pygaflra pi~~a Hufn.
Dr8pana z.ac8I'tinal'ia. L.
DI'epana fatcatal'ia L.
Macrotnylaaia I'ubi L.
PterOB toma pa lpinum L.
LophopteI'y:r: capucina L.
Lasiocampa quercuB L.
Notodonta dromedariuB L.
Te thea or. Schiff.
pheosia gnoma F.
Leucoma salicis L.
Tl"ichi ura ora tae!7't L.
Poeci locaMpa populi .L.
Ptiloph(i)l'a plumi(Jsl'a Esp.
Fig. 2.
----......--1----+---­
I 20
I
I
---~--Ti
26
2
1
7
, -t-
9
I 5
--t-------1"------+----I----i--­ - -f--­ !
1
~ -t----t-- 5
-­ ~ ---+-------+­
-+­
The flight periods of Bombyces at Amli in 1971. The columns are based on a logarithmic
__--i--'__~_66
__ 9
scale, y = 1 + 3 log n. Figures to the right indicate the total number of individuals caught
during the season.
11
1
8
the number of specimens of the genera IS
therefore presented in Table I.
The light-trap catches of Bombyces at
Amli in 1971, and of Noctuoidea at Grimstad
in 1971 are given in Figs. 2 and 3. The numbers
of individuals of each species caught in
the course of the year are summarized. Each
month is divided in six periods of five days
starting from 15 April. The last periods of
May, July, August, and October have six
days. To obtain comparable units, the total
amount of the six-day periods is reduced by
the number equal to one daily average.
DISCUSSION
The fauna of the area
The southern part of Aust-Agder county
(AAy) is estimated to be one of the districts
of Norway with the most diverse lepidopterous
fauna (Opheim 1958, 1962). The reason
for this may be the mild climate and the great
variety of plants (Murdock et al. 1972).
Opheim (1958) listed 57 species of Bombyces
from Norway. The present investigation
adds three new species giving a total of
60 species. In AAy 52 species were recorded,
and 38 species were found in the light-trap
catches. By 1973, 305 species of Noctuoidea
had been recorded from Norway. Opheim
(1962) listed 289 species and 15 have been
added in recent years, one as a result of the
present study. In AAy 235 species were recorded,
and 192 of those (82 %) were caught
in the light-traps at Grimstad and Amli.
Pulliainen (1965) studied the noctuid fauna
at Varkaus in South Finland (1960-63) and
listed 107 species.
The lepidopterous fauna is influenced by
species with a southern continental distribution.
Species with their main range in central
Europe, like Drymonia ruficornis Hufn., D.
trimacula Esp., N otodonta anceps Goeze,
Parmelina ridens F., Orthosia miniosa Schiff.,
Xylocampa areola Esp., Conistra vau-punctatum
Esp., Luperina testacea Schiff., Thalpophila
matura Hufn. and Griposia aprilina
L. clearly indicate this. Nevertheless, some
more northern species are part of the fauna,
e.g. Selenophera lunigera Esp., Anomogynea
speciosa Hb., Chersotis cuprea Schiff. and
Apamea rubrirena Tr. (Nordstmm et al. 1961,
1969).
Flight periods
The flight periods of the various species are
indicated in Figs. 2 and 3.
Some species had two flight periods during
1971. This indication of two generations