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Israel Journal of Entomology
Vol. XXX (1996) pp. 71-90
THE BIBIONIDAE (DIPTERA) OF ISRAEL
JOHN SKARTVEIT
1
AND FINI KAPLAN
2
1
Museum of Zoology, University of Bergen, Museplass 3,
N-5007 Bergen, Norway
2
Department of Zoology, The George S. Wise Faculty for
Life Sciences, Tel Aviv 69978, Israel
ABSTRACT
Six species of Bibionidae are examined and recorded from Israel and adjacent areas.
Bibio amnon and Dilophus clavicornus are described as new. A key to the adults of
Israeli Bibionidae is presented. All species are illustrated, including male terminalia and
fore tibiae for each species. Comments on the ecology of the species are given whenever
available. A comment on an apparently erroneous record of Bibio marci (Linnaeus) from
Israel is included.
KEY WORDS: Diptera, Bibionidae, Israel, Bibio amnon n. sp., Dilophus clavicornus n. sp.
INTRODUCTION
Bibionid flies are common in forests, grasslands and agricultural ecosystems throughout the
world. In the Palaearctic region, the dominant genera are Bibio Geoffroy, 1762, with about 70
recognized species, and Dilophus Meigen, 1803, with about 30 recognized species
(Krivosheina, 1986; Skartveit, 1993). Dilophus is most diverse in the Southern Hemisphere
(Harrison, 1990), whereas Bibio is more diverse in the Northern Hemisphere. Bibionid larvae
live gregariously in the soil, feeding mostly on decaying plant material but occasionally
damaging crops (D'Arcy Burt and Blackshaw, 1991). The larvae are most abundant in humid
soils with a large content of organic matter. Adult males can often be observed swarming,
whereas females of most species are frequently encountered in open flowers. The bibionid
fauna of Western Asia and the Eastern Mediterranean has been dealt with rather sporadically.
Walker (1848) described Dilophus tridentatus from Libya. Steyskal and El-Bialy (1967) listed
five species from Egypt. Haenni (1981) treated the North African Dilophus and later (Haenni,
1985) the bibionid fauna of Saudi Arabia. Bodenheimer (1937) listed two species of Bibio
from Palestine. Freidberg (1988) stated that the Israeli fauna consisted of two Bibio and four
Dilophus species, but only mentioned the name of the most conspicuous species, Bibio
hortulanus (Linnaeus).
The present paper summarizes the knowledge on the Israeli bibionid fauna, presents a key
to all the taxa, and gives detailed descriptions and illustrations of the two newly described
species (one each in Bibio and Dilophus). Other species are compared to the new species. New
records available from neighboring countries are also included.