Studies on Norwegian Aphids - Norsk entomologisk forening

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48 A. STRAND teriale er den hos starki st0rre og betydelig bredere og mer stumpvinklet enn hos praeusta. Figurene viser den apikale del av penis hos det nevnte eksemplar av starki fra AK: Br0nn 0ya (fig. 1 A), hos et eksemplar av praeusta fra TRi: Rundhaug, Malselv (fig. 1 B), og hos et eksemplar av praeusta fra Wien (fig. 1 C). Hos eksemplaret av starki fra Bohmen er penis noe spissere enn hos det norske. Hos begge eksemplarer av starki, som utvilsomt er fuHt utviklet, er penis lysere enn hos praeusta-eksemplarene. Mottatt 28. februar 1968 LITTERATUR HOR10N, A. (1935) Nachtrag zu Fauna Germanica. Die Kaler des Deutschen Reiches von Edmund Reitter. Krefeld (358 p.). MULLER, J. (1926}27) Ueber elnJge europaische Bockkafer. Coleopt. Zbl. 1, 310-315. REITTER, E. (1912) Fauna Germanica. Die Kii/er des Deutschen Reiches, IV. Band. Stuttgart. (236 p.). SCHMIDT, G. (1958) Untersuchungen uber die mitteleuropiiischen Vertreter des Genus Tetrops Stephens. Mitt. dt. ent. Ges., 17, 53-60.
The Life Cycle of Ephemeroptera in the Lower Part of Aurland River in Sogn and Fjordane, Western Norway ROALD LARSEN Zoological Museum, University of Bergen Abstract: LARsEN, R. 1968 The Life Cycle of Ephemeroptera in the Lower Part of Aurland River in Sogn and Fjordane, Western Norway. Norsk ent. Tidsskr. 15, 49-59. Collections of larvae of Ephemerella aurivillii, Baetis rhodani, and Ameletus inopinatus (Ephemeroptera) were made each month during 1966 in the Aurland River, Western Norway, and were used to get information about the life cycle of the species. E. aurivillii emerges mainly in June, July, August and September. The new generation begins to appear in August and growth proceeds throughout the winter with a drop in the growth rate through January and February. The animals complete a generation in one year. B. rhodani emerges from April to the beginning of November, and completes two generations in one year. These consist of a long overwintering and a short summer generation, the former emerging from April to July, the latter from July to the beginning of November. A. inopinatus emerges throughout May-August. No hatching is found from December to August the next year. There is only one generation in one year. During 1966 the life cycle of the benthic species of Ephemeroptera was studied at two localities in the Aurland River. The positions of the localities are shown on Fig. 1, marked Loc. 1 and Loc. 2, and more detailed maps of the stations, called TR and A4, at which this work was carried out, are shown on Fig. 2 and Fig. 3. The River is characterized by the criteria given by Brinck (1949) for Northern rivers. Variations in water-flow during the investigation period are shown on Fig. 4. METHODS On each sampling station 15 samples were taken every month, 5 on sand bottom (A), 5 on stony bottom without moss vegetation (B), and 5 on stony bottom with a compact layer of moss (C). Because of the great number of individuals only a part of the samples were examined, as shown in Table I. The substrata mentioned above are seen on Figs. 5, 6 and 7. Samples were taken partly with a Sur- 4-1';O1'sk ent. Tidsskr. ber-Sampler and partly with a Neill's cylinder (Macan 1958), both covering an area of approximately 0.1 m 2 . The collecting apparatus was made of plankton net size 250 \1' Sand, stones and moss were placed in a bucket. Larger stones and finer materials were washed and thrown away. The remains were preserved in 80 per cent alcohol, and total macroscopic fauna was sorted out under a binocular. The larvae of Ephemeroptera were measured in mm on a microscope slide. Measurements were taken from the anterior edge of clypeus to the base of caudal cerci. All larvae more than 1 mm in length were measured. Some larvae below 1 mm passed through the collecting net and were therefore excluded from the quantitative analysis. Water current and depth were measured every month. Samples were taken from 0 to 80 cm depth, and in the current range of 50 cm/sec. to 130 cm/sec. Care was taken to sample each of the three categories of substrata each month under the same current and depth conditons.
Page 2 and 3: NORSK ENTOMOLOGISK TIDSSKRIFT Redak
Page 4 and 5: 2 o = 0stfold AK = Akershus (inc!.
Page 7 and 8: cimum myrtillus 24. VI 1953, Titles
Page 9 and 10: Fjelddalen (1964) from VE: Sem and
Page 11 and 12: sp. 15. X 1961 (oviparae), Kviturds
Page 13: Trappings in yellow trays: AK: As:
Page 18 and 19: 16 H. TAMBS-LYCHE REFERENCES BORNER
Page 21: lI Studies on the
Page 24: 22 R.DAHL Fig. 3. On sheltered low
Page 27 and 28: Ephydridae DIPTERA BRACHYCERA OF TH
Page 29 and 30: have their distribution centre in t
Page 31 and 32: 0:: W 0-
Page 33 and 34: Bombus jonellus (Kirby) (Hym., Apid
Page 35 and 36: Notes on the Genus Boreus in Norway
Page 37 and 38: Gyrophaena keeni Casey and G. orien
Page 39: Micaria decorata Tullgren 1942 (Clu
Page 42: Corticarina irkutensis n. sp. (Col.
Page 47 and 48: 0,1 mm Fig. 11. Platosternite of M.
Page 53 and 54: Fig. 3. Station Ai situated 110 m a
Page 55: Fig. 7. Stone-substratum with moss-
Page 61 and 62: GLEDHILL, T. (1959) The life-histor
Page 63 and 64: Om noen norske arter av slekten Ath
Page 65: Uber die norwegischen Tabaniden (Di
Page 69 and 70: Table I. Measurements of Panamomops
Page 71 and 72: tance to the laterals about 1.25 ti
Page 73: The Larva of Miscodera arctica Payk
Page 77: Acrotrichis insularis (Maklin, 1852
Page 81 and 82: levevis og klassifisering. Avsnitte
Page 83 and 84: Det vii nok forbause mange at f0rst
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Studies on Norwegian Aphids - Norsk entomologisk forening

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