Full-text - Norsk entomologisk forening

Tore NielsenFig. 3. Helophilus trivittatus Fabr. in a Comaruvn palustre L. flower.pratensis Moench. - Matricaria inodora L. - Arnica montana -Senecio jacobaea L. - Taraxacum sp. Web. - Hieracium sp.Substrate during sunning: Leaves of Betula odorata Bechst. -Alnus incana (L.) Moench. - Quercus sp. L. - Rubus idaeus -Menyanthes trifoliata - Tussilago farfara.Frequency : Common everywhere and usually extremely abundant.It does not seem to become abundant, however, until themiddle of June. - D e n m a r k: common and widely distributed(Lundbeck 1916 and Torp Pedersen 1964). - G r e a tB r i t a i n : "Common" (Coe 1953).Distinguishing characteristics: See under H. hybridus.Distribution: "Europa" (Sack 1932). - "All Europe and onMadeira; towards the north to northern Sweden, in Finland,and on the Faroe Islands and Iceland" (Lundbeck 1916).H. hybridus LoewLocalities : Sele 1217 -65 (5), Skasheim 218 -63 (2), Kleppe 1617 -65(I), Skjzveland 1717 -65 (3), 1118 -65 (2), 1518 -65 (9), 0ksnevad 2416-63 (I), 21/6-64 (12), 24/6-64 (6), 14/7-64 (a), 1/8-64 (ZO), 218 -64(9), 9/8-64 (I), 2915 -65 (3), 2217 -65 (1). 2317 -65 (2), Myrland 517 -64 (I), Bratteb~r 5/6-65 (I), Austrdtt 2016-63 (I), Forus 14/8-63 (I),15/8-63 (I), Gimra 417 -63 (I), 16/8-63 (I), 2815 -65 (3), 3115 -65 (3).Biotopes: The species was found on rather dissimilar biotopesbut for the most part in open country. It has also been found inconiferous forests: Myrland (1) and Bratteba (I), and in forestglades (spruce and pine stands) near a pool : flksnevad (extremelyabundant).