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

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ved to remain fairly constant in the same population despite increasing sample size. The overall diversity is expressed by the Shannon - Wiener index of general diversity (Odum 1971) s H' =- L(~}10g2 (~) i= I where ni is the number of specimens of the ith species, and N is the Lni. It ranges from 0 to 10g2S, The index combines both the species richness and the equitability components of animal diversity. The equitability component can be separated from the effect of the number of species using Uoyd and Ghelardi (1964) equitability index (E). The degree of equitability is appreciated by comparing the observed diversity, H', to a value Hm, attainable by a community containing the same number of species as the observed one, but with «maximum» equitability, i.e. following McArthur's «broken-stick» model of frequency distribution of the species (Southwood 1975). This is equivalent to the ratio E =S'/S where S' is the number of hypothetical, equitably distributed species that would be needed to produce a species diversity equivalent to the observed one, and S is the actual number of species observed. The Noctuidae and Geometridae faunas in the two habitats have been compared using two different similarity indices: 1. The S0rensen (1948) quotient of similarity QS=L a+b where a is the number of species in habitat A, b is the same in habitat Band j is the number of species found in both habitats, measuring the relative similarity of the two habitats in terms of species composition, with emphasis on the number of species found in both habitats. 2. The Renkonen (1938) percentage of similarity %S =Lmin. (a,b ..... x) places the emphasis on the dominant species. The percentage importance value of each species is calculated in both habitats and the percentage of similarity is given by the summation of the smaller values of each pair of percentages. RESULTS The species The butterflies (Papilionoidea) found in the area are listed in Tab. 2. The indications of abundance on the grassland and in the heath are ba 88 sed on captures and observations. Thirteen of these species were taken more or less regularly, while the record of Lasiommata petropolitana (Fabricius, 1787) is based on one larvae only. In addition three notorious migrants or vagrants have been captured or observed on northern Sotra. One specimen of Nymphalis antiopa (L., 1758) was observed at Agitnes in August 1977 (A. Fjeldsa pers. corn.). Cynthia cardui (L., 1758) was frequent on northern Sotra during the autumn 1978. Vanessa atalanta (L., 1758) was not observed in the area during the present study, but several specimens of this common migrant have been taken at Knappskog in August 1937 (coll. Zoo1. Mus., Bergen). A total of 174 species were taken in the light traps on the grassland at Austervagen and in the heath at Austre Loftmyra in 1978, Tab. 3. Noctuidae were represented by 91 species, Geometridae by 70 species, and Notodontidae by 8 species. Two species of Lasiocampidae were taken, and Thyatiridae, Sphingidae and Lymantriidae ~ were represented by one species, each. In addition 34 more species were taken on northern Sotra, Tab. 4. These species were either caught in one of the other light traps, with nets, or taken as larvae. Seven families were represented, Geometridae with 15 species, Noctuidae with 14 species, and Lasiocampidae, Satur- • niidae, Thyatiridae, Sphingidae and Arctiidae with one species each. Several of the species have an atlanto-mediterranian distribution. The most typical in this respect is Stilbia anomala (Haworth, 1812); its range covers the British Isles, Germany, France and Spain and it is also recorded from Syria (Edelsten and Fleteher 1960. Aporophyla nigra ffiaworth, 1809) is distributed in Northwest-, West-, and Southern Europe; the occurrence along the Western Coast of Norway constitutes the northern border of the range (Opheim 1955). Also Pachycnemia hippocastanaria (Hubner, 1799) and Aporophyla lutulenta (Denis & Schiffermuller, 1775) have a somewhat similar distribution, but they are recorded from most parts of Denmark inclusive Bornholm and also from Southern Sweden (Hoffmeyer 1966, Nordstrom et al. 1969). In Norway Paradiarsia glareosa (Esper, 1788) is mainly taken along the West Coast, but it has a wider range in Scandinavia, including Southern Finland (Nordstr6m et al. 1969). A relative large number of migrants have been taken on northern Sotra, viz.: Vanessa atalanta, Cynthia cardui, Agrotis ipsilon (Hufnagel, 1766), Peridroma saucia (Hubner, 1808), Myt • J
Table 2. Relative abundance ( + , + +, + + +) of the butterflies (Papilionoidea) inhabiting grasslands and Ca/ /una heaths on northern Sotra. Species Grassland Cal/una heath Pieridae Pieris brassicae (L., 1758) + P. napi (L., 1758) + + + + Nymphalidae Ag/ais urticae (L., 1758) +++ + Mesoacidalia ag/aja (L., 1758) ++ + + Hipparchia seme/e (L., 1758) + Manio/a jurtina (L., 1758) ++ Coenonympha pamphi/us (L., 1758) ++ Lasiommata maera (L., 1758) + + L. petropolitana (Fabricius, 1787) + , • C/ossiana se/ene (Denis & Schiffermiiller, 1775) Lycaenidae Cal/ophrys rubi (L., 1758) ++ + + + Lycaena ph/aeas (L., 176I) + + P/ebejus argus (L., 1758) + + + Po/yommatlls icarus (Rottemburg, 1775) + + Table 3. Macrolepidoptera taken in the light traps on the grassland at Austervagen and in the Cal/una heath at Austre Loftmyra in 1978. SPECIES Grassland Cal/una heath cl Q cl Q Lasiocampidae Poeci/ocampa populi (L., 1758) 29 2 Macrothy/acia rubi (L., 1758) 3 7 • Thyatiridae Tethea or (Denis & SchiffermiilIer, 1775) 3 Geometridae Geometra papi/ionaria (L., 1758) 2 ldaea bise/ata
Page 1 and 2: 2 o .eg an Jo OL2 of En1tomol0lD'
Page 3 and 4: Carabidae and Staphylinidae (Col.)
Page 5 and 6: Table l. Mean activity density, giv
Page 7 and 8: JEU'lY As SKI Activity Species 1975
Page 9 and 10: Table 4. The 10 most numerous staph
Page 11 and 12: 1 .. ... · • a. a. · .. • a.
Page 13 and 14: .. ...• ~ • a. a. · · ~ = •
Page 15 and 16: - (Red.) 1960. Catalogus Coleoptero
Page 17 and 18: Dyschirius septentrionum is a regul
Page 19 and 20: J sparsely vegetated fallow land wi
Page 21 and 22: Table 2. The abudance (number per 0
Page 23 and 24: Records of nine species of Ophionin
Page 25 and 26: 1972, 4Q Q, 4-15 Oct. 1972, 2Q Q, R
Page 27 and 28: Table I. Bumblebee nests from two d
Page 29 and 30: Hydroporus erythrocephalus (L.). MR
Page 31 and 32: delse i Norge, og er tidligere ikke
Page 33 and 34: -. Table I. Localities. Abbreviatio
Page 35 and 36: Hr., Jt., Pf. I June-4 July, abunda
Page 37 and 38: ler, 1775)]t. 3 and 18 Aug. 2 d, I
Page 39 and 40: Some studies on Macrolepidoptera in
Page 41: een planted, mostly as single trees
Page 45 and 46: SPECIES Grassland Cal/una heath 0 9
Page 47 and 48: Table. 4. Additional Macrolepidopte
Page 49 and 50: 50 50 30 10 . .~ "' Q. . , '" 30 1
Page 51 and 52: Ent.phn. ' ••.f,.ta Perl~oma ri
Page 53 and 54: C.r"5tl~ fubricosa Amplllpyrd "agop
Page 55 and 56: Table 6. Sex ratio and median day o
Page 57 and 58: Ematurga atomaria. Other species of
Page 59 and 60: Survey of the Pine Beauty Moth Pano
Page 61 and 62: Fig. 2. Trap model. (Copied from Bo
Page 63 and 64: the results indicate certain differ
Page 65 and 66: terestingly, the lepidopterous host
Page 67 and 68: Material: Raubekken 900 m I Q 17 Ju
Page 69 and 70: Chironomidae (Dipt.) from Ekse, Wes
Page 71 and 72: SYSTEMATIC LIST Podonominae Parochl
Page 73 and 74: Prodiamesinae Prodiamesa olivaeea (
Page 75 and 76: Edwards, F.W. 1922. Results of the
Page 77 and 78: In the species-list previously publ
Page 79 and 80: Kauri (966) mentions it from SFi: A
Page 81 and 82: 0kland, F. 1939. En vesteuropeisk O
Page 83 and 84: Table I. Ecologicel notes.Meterial
Page 85 and 86: 4.MEGABUNUS DIAOEMA 5. RIL.'IiHA TR
Page 87 and 88: IO.L.A&INIL6 EPHIPPIATla II.MITOPU6
Page 89 and 90: ( Short communiCatiOns) THE FUNGIVO
Page 91 and 92: GUIDE TO AUTHORS. FAUNA NORVEGICA S

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