Fróðskaparrit - 01.01.1993, Page 111

THE LEAFHOPPERS (HOMOPTERA, AUCHENORRHYNCHA) OF THE FAROEISLANDS
115
and here the dentation on the second valvu-
lae may provide a clue. In Fennoscandia
and Denmark there are 19 species, in the
Faroes 4 species.
The colour of M. ossiannilssoni is green-
ish or yellowish, the markings on the head
are black. The aedeagus of the male (Fig.
30) together with the shape of the
apodemes (Fig. 31) separates it from the
very similar M. sexnotatus (Fall.), which is
not found on the Faroes, the second valvu-
la of the female (Fig. 32) is strongly serrat-
ed.
On the Faroe Islands it is found in damp
places like meadows and near streams in
the outfield. Little is known of its host
plants, but it is sometimes associated with
Juncus squarrosus L., which is widespread
and common on all islands except Myki-
nes, Koltur, Stóra and Lítla Dímun (Han-
sen, 1966) or Sphagnum (LeQuesne, 1969).
It is widespread in Europe including Scot-
land and Norway, but so far not found in
Iceland. It is a common and widespread
species.
Vágar: Bøur, 26 August 1992 (P.Ketil/L.Trolle)
Miðvágur, 26 August 1992 (P.Ketil/L.Trolle)
Streymoy: Dalá, N.of Vestmanna, 22 August 1992
(P.Ketil/L.Trolle)
Vestmanna, 22 August 1992 (P.Ketil/L.Trolle)
Kvívík, 22 August 1992 (P.Ketil/L.Trolle)
Norðradalur, 26 July 1989 (P.Ketil)
Eysturoy: Slættaratindur, 24 August 1992 (P.Ketil/L.Trolle)
Funningur, 25 July 1989 (P.Ketil)
Svínáir, 24 August 1992 (P.Ketil/L.Trolle)
Norðragota, 26 July 1989 (P.Ketil)
Viðoy: Viðareiði, 5 September 1992 (P.Ketil/L.Trolle)
Sandoy: Húsavík, 21 July 1989 (P.Ketil)
Skúvoy: Skúvoy, 20 July 1989 (P.Ketil)
Suðuroy: Sandvík, 2 September 1992 (P.Ketil/L.Trolle)
Trongisvágur, 1 September 1992
(P.Ketil/L.Trolle)
Tvøroyri, 7 July 1926 (J.P.Kryger)
Øravík, 2 September 1992 (P.Ketil/L.Trolle)
Hovi, 3 September 1992 (P.Ketil/L.Trolle)
Sumba, 2 September 1992 (P.Ketil/L.Trolle)
Akraberg, 2 September 1992 (P.Ketil/L.Trolle)
8. Macrosteles laevis (Rib.), Figs. 15 and
16. Distribution map, Fig. 49.
(Cicadula sexnotata (Fall.).
Macrosteles laevis looks so much like M.
ossiannilssoni that really they cannot be
told apart. However the male genitalia are
distinctive, especially the aedeagus (Fig.
33) and the second abdominal stemum
(Fig. 34). The second valvula of the female
(Fig. 35) is serrated, but rather less so than
that of the female M. ossiannilssoni.
M. laevis is the only species, which will
tolerate close sheep-grazing and so it is the
species, which can also be found in drier ar-
eas in the outfield. It is rarely numerous in