Fróðskaparrit - 01.01.1993, Blaðsíða 112

116
THE LEAFHOPPERS (HOMOPTERA, AUCHENORRHYNCHA) OF THE FAROE ISLANDS
I-----------1
1 mm.
Fig. 15: Macrosteles laevis (Rib.) male
Streymoy, Kollafjorður - 24 August 1992
Fig. 16: Macrosteles laevis (Rib.) female
Streymoy, Kollafjorður - 24 August 1992
such places, whereas in dry meadows the
number of individuals can be almost astro-
nomical, for instance at Svínáir on Eystur-
oy. It feeds mainly on various grasses in-
cluding cereals and sometimes the leafhop-
pers are so numerous, that they cause ex-
tensive damage to the plants due to sap
losses caused by the feeding insects (Tull-
gren, 1925). M. laevis has also been shown
to be a vector of various virus diseases like
the European aster yellows and the oat blue
dwarf on cereals and other plants (Ossian-
nilssðn, 1983).
It is very widespread in Europe including
Scotland, Norway and. Iceland. It is also
found in Greenland. On the Faroe Islands it
is a common species.
Streymoy: Dalá, N.of Vestmanna, 22 August 1992
(P.Ketil/L.Trolle)
Kollaíjørður, 24 August 1992 (P.Ketil/L.Trolle)
Norðradalur, 26 July 1989 (P.Ketil)
Tórshavn, 6 July 1989 (P.Ketil)
Tórshavn, Skansin, 21 August 1992
(P.Ketil/L.Trolle)
Tórshavn, 5 September 1992 (P.Ketil/L.Trolle)
NólsoyiNólsoy, 30 August 1992 (P.Ketil/L.Trolle)
Eysturoy: Eiði, 27 July 1989 (P.Ketil)
Eiðisvatn, 25 July 1989 (P.Ketil)
Gjógv, 25 July 1989 (P.Ketil)
Ljósá, 25 July 1989 (P.Ketil)
Svínáir, 24 August 1992 (P.Ketil/L.Trolle)
Norðragóta, 26 July 1989 (P.Ketil)
Lamba, 26July 1989 (P.Ketil)
Æðuvík, 26 July 1989 (P.Ketil)
Kunoy: Kunoy, 5 September 1992 (P.Ketil/L.Trolle)
Haraldssund, 5 September 1992 (P.Ketil/L.Trolle)
Viðoy: Viðareiði, 5 September 1992 (P.Ketil/L.Trolle)
Svínoy: Svínoy, 14 July 1989 (P.Ketil)
Fugloy: Kirkja, 17 July 1989 (P.Ketil)
Sandoy: Søltuvík, 29 August 1992 (P.Ketil/L.Trolle)
Sandur, 22 July 1989 (P.Ketil)
Dalur, 21 July 1989 (P.Ketil)
Suðuroy: Sandvík, 2 September 1992 (P.Ketil/L.Trolle)
Líðin, 2 September 1992 (P.Ketil/L.Trolle)
Fámjin, 2 September 1992 (P.Ketil/L.Trolle)