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

ler, 1775)]t. 3 and 18 Aug. 2 d, I 9. Syngrapha
diasema (Boisduval, 1829) Hr. 7-18 July 3 d. S.
microgamma (Hubner, 1823) HI. 24-26 June
1970 I 9. S. interrogationis (L., 1758) Hb., Hr.,
Jt. 7 July-I Sept. 3 d, 29. Abrostola triplasia
(L., 1758) (syn.: triplasia sensu Dufay 1956, tripartita
(Hufnagel, 1766)) Hr., Jt., Pf. 20 June-l
July, 3-19 Aug. 9 d , 29. Euclidia glyphica (L.,
1758) «Sigdal» 30 June 1968. Lygephila craccae
(Denis & Schiffermuller, 1775) Hr. 15 Aug.-9
Sept., several specimens. L. pastinum (Treitschke,
1826) Pf. July 1968 Id. Scoliopteryx libatrix (L.,
" 1758) Jt. 20 June 1970 1d, I 9. Hypena crassalis
(Fabricius, 1787) Hr. 7-11 July 1970 19. Hypena
proboscidalis (L., 1758) Jt., Pf. 30 June and 3
Aug., abundant. Herminia tarsipennalis (Treitschke,
1835) Pf.
DISCUSSION
M0rch's collection contained a total of 496 species
of Lepidoptera from western Buskerud.
This represented an increase in the number of
species recorded for western Buskerud of about
40 percent; in the case of Geometridae and Noctuidac
almost 100 and 125 percent, respectively.
The occurence of most of the species was expected
when their known range in comparable
inland localities elsewhere in eastern Norway is
considered. But there are also records ofparticular
faunistical interest. Firstly some Eurasiatic,
principally continental boreal, boreo-montane
• or boreo-alpine species, viz.: Xestia collina (Boisduval,
1840), Xestia rhaetica (Staudinger, 1870,
Hi/fia iris (Zetterstedt, 1839), Syngrapha diasema
(Boisduval, 1829), Syngrapha microgamma
(Hubner, 1823), and Spargania luctuata
(Denis & SChiJfermUller, 1775), have got their
known range extended to the southwest. Se­
\ condly, a westward extension of mainly continental,
European or Eurasiatic species viz.:
Chionodes luctuella(Hubner, 1793), Lampropteryx
otregiata (Metcalfe, 1917), Opigena fJolygona
(Denis & SchiffermUller, 1775). Thirdly, a southward
extension of Agonopterix broennoeensis
(Strand, 1920), at present a Scandinavian endemic.
The capture of several of these, mainly boreo-alpine
species, outlines an increase of their
presumed continous Fennoscandian range. Other
captures join, together with captures further
south and west, a prospected range penetrating
deep into the southwest mountain districts of
Norway. The latter statement is explained by
some unpublished records: L. otregiata Kvassdalen,
HOi: Voss 4 July 1940 I d N. Knaben
leg. X. collina Solhaug, HOi: R0ldal 2 July 1942
1 d, 1 Q O.B. Lundetrre leg. H. iris Rosendal,
HOi: Kvinnherad 10 - 15 Aug. 1977 1 d T.
Andersen leg.; Dimmelsvvik, HOi: Kvinnherad
17 Aug. 1977 5 d T. Andersen leg.: Uskedalen,
HOi: Kvinnherad 17. Aug. 1977 3 d T. Andersen
leg. S. diasema Nedrest01, BV: Hol 18 July
1971 1 Q T.I. Baldersheim leg.; Bykle, AAi:
Bykle July 1969 1 Q A. Fjellberg leg.
L. otregiata and O. polygona occured commonly
in Sigdal. This is interesting as there are
only a few previous observations of these species
in Norway. L. otregiata has previously only
been recorded from Akershus (Knaben 1951,
Opheim 1967 as Lampropteryx minna auctJ At
Juvet the species even outnumbered other geometrids.
O. polygona was recorded for the first
time in Norway from Akershus (Opheim 1969),
and it has recently been recorded from Rollag in
western Buskerud (Opheim 1978). There is one
additional unpublished record from eastern Buskerud:
Svene, B0: Flesberg 1 Sept. 1969 1 d
O.B. Lundetrre leg.
A number of the species have previously not
been taken in the inlands west of the Oslofjord,
viz.: Archiearis notha (Hubner, 1803), Eulithis
mellinata (Fabricius, 1787), Angerona prunaria
(L., 1758), Tritophia tritophus (Denis & Schiffermuller,
1775), Eilema complana (L., 1758), Polia
nebulosa (Hufnagel, 1766). Ammoconia caecimacula
(Denis & Schiffermuller, 1775), Xanthia
aurago (Denis & SchiffermUller, 1775), Acronicta
alni (L., 1757) and Lygephila craccae (Denis
& SchiffermUller, 1775). It must however, be
emphasized that the occurence of these species
in Sigdal does not deviate much from their expected
range if their Swedish distribution is considered,
but merely points out the unsufficient
knowledge of districts of eastern Norway.
The food plant of X. aurago, Tilia cordata,
does not grow naturalized in Sigdal. However,
experience from other districts will associate X.
aurago with Ulmus glabra, which is common in
the eastern part of Sigdal.
Opheim 0958, 1962) has given graphs of the
supposed number of species of various family
groups in different parts of Norway. The revised
figures for western Buskerud, compared to Opheim's
estimates (given in brackets), are: Rhopalocera
47 (53), «Sphinges, Bombyces» 29 (35)
and «Noctuoidea» 126 (25). The overall figure
for the area is hence almost brought up to the estimate,
but western Buskerud still remains
amongst the least explored areas. In the advanced
lowlands in the eastern part of western Buskerud
there are undoubtly several species still
to be taken. Also if compared to northern Opland,
a well-worked inland and mountainous
83