Full-text - Norsk entomologisk forening

,..,~ IJ8 -0 I .:... IRI I:::::.INNI~ IN;::­I(Sj0rs 1967, R0nning 1972), one of the samplingsites was in the middle alpine zone, sixin the low alpine zone, and four in the subalpinezone. The middle alpine has patches ofplant cover while a continuous plant cover ispresent in the low alpine zone. The subalpineis in this area characterized by a birch belt.Sampling was carried out during the years1980-1983 and covered the months June toOctober.c'"'coC::I '" oQ.8~ ...=(1)(I) '"~.;(1)_.... '"~~QcCl,,) 0;;;..c_... '"c~.- ,-,(1) ....._",'"cc·­c>.Q...>ol(1)­'c ~"'~i5:c'0:';C (I)"'­",0.... (I)(1)=-0 Q.o..9~:0-;(1)8....-.... ~(I)","­(I)'"'O~.- 88'"(I) ....0.0........ 0'"::I (I)(I).cz8.... ::1o C'0'" '" '".~ c.... ~(1)0Q...c... ",..c •.­~~~O'INI~o.coo"'0'1E-o­~U>!rC>­"5 ..,....,5co I :::::.~It\Nco~::~coNN~~,...0,..,la~0­It\......~~;::­co......;!It\......~:::::.0­.:...N.:...N:::::.I.- ..'"!!l '":s :s :l~ ~x xL.:...~:::::.N......~.:...~......coi~:l '"..~~.......:...~:::::.~N......N:::::.N,...~0~......0­~......It\:::::.~!!l~~~'" .= a;I!3l::a.:...N.:...~.:...~co..coL.3'"coU>RESULTSA total of 12 species were recorded in thisstudy. No species were collected in themiddle alpine zone (see Tab. 1), viz. above1400 m a.s.1. Six species were found in thelow alpine zone, between 1100 and 1400 ma.s.1. These are Helicoconis lutea, Hemerobiusperelegans, H. stigma, Micromus paganus,Wesmaelius malladai and W. nervosus.H. perelegans was recorded only in the lowalpine zone.Two species were dominant in the samples,H. pini and W. nervosus. The remaining specieswere represented by single or few specimensonly. One should, however, keep inmind that the number of specimens of thesegroups usually are rather low also in morefavourable localities in Norway, and thatmass occurrence is rarely seen.In the subalpine zone 10 species were collected.Species recorded only in the subalpinezone are Sialis lutaria, Chrysoperla carnea,H. nitidulus, W. mortoni, and Boreus sp. Thegenus Boreus was represented by femalesonly, and because these are difficult to identify,we have not listed species. However,only two species of Boreus, B. hyemalis (L.,1767) and B. westsoodi Hagen, 1866, havebeen recorded from Norway. Dominant speciesin the subalpine zone are the same as inthe low alpine zone, viz. H. pini and W. nervosus.The Planipennia were flying from June toOctober, but only a few species were sampledin such »high" numbers that they gave anyreliable data on flight periods. These few speciesare listed in Tab. 2.In the Dovrefjell area, June belongs tospring/early summer, July-August is summer,and September-October is autumn.There was no definite spring species. Summerspecies are S. lutaria, H. pini, M. paganus andW malladai. W. nervosus seems intermediateI60