The Alysiinae (Hym., Braconidae) parasites of the Agromyzidae (Diptera). IV. The parasites of Hexomyza Enderlein, Melanagromyza Hendel, Ophiomyia Braschnikov and Napomyza Westwood.

Abstract

1. This paper, the fourth of aseries, deals with the Dacnusini (Alysiinae) parasites of Hexomyza Enderlein, Melanagromyza Hendel, Ophiomyia Braschnikov (Agromyzinae) and Napomyza Westwood (Phytomyzinae). Except for a single species of Dacnusa the parasites all belong to two disjunct groups of the genus Chorebus, the C. senilis group s.l. and the C. cybele group, which are both redefined. - 2. Revised keys are given to the European species of the two Chorebus groups treated. Keys are also given to the parasites of three of the host genera, and to the parasites of those flies associated with chicory (Cichorium intybus). - 3. Except for the single Dacnusa species (which also attacks certain Phytomyza spp.), all parasites treated in this paper exhibit a high degree of host specificity. A complete host parasite list for Europe has been prepared, including revision of previous records. - 4. Seven new species are described, six in the Chorebus senilis group s.l. and one in the Chorebus cybele group.

Nomenclatural Acts

bathyzonus (Marshall, 1891) (Chorebus), comb. n. hitherto Dacnusa bathyzona
caesariatus Griffiths, 1967 (Chorebus), spec. n.
cybele (Nixon, 1937) (Chorebus), comb. n. hitherto Dacnusa cybele
didas (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa didas
fuscipennis (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa fuscipennis
gedanensis (Ratzeburg, 1852) (Chorebus), comb. n. hitherto Alysia gedanensis
glaber (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa glabra
heringianus Griffiths, 1967 (Chorebus), spec. n.
ibericus Griffiths, 1967 (Chorebus), spec. n.
leptogaster (Haliday, 1839) (Chorebus), comb. n. hitherto Alysia (Dacnusa) leptogaster
lychnidis Griffiths, 1967 (Chorebus), spec. n.
orbiculatae Griffiths, 1967 (Chorebus), spec. n.
parvungulus (Thomson, 1895) (Chorebus), comb. n. hitherto Dacnusa (Dacnusa) parvungula
pulchellus Griffiths, 1967 (Chorebus), spec. n.
rondanii (Giard, 1904) (Chorebus), comb. n. hitherto Dacnusa rondanii
senilis (Nees, 1814) (Chorebus), comb. n. hitherto Bassus senilis
xiphidius Griffiths, 1967 (Chorebus), spec. n.
acco Nixon, 1943 (Dacnusa), syn. n. of Chorebus parvungulus (Thomson, 1895)
anguligena Nixon, 1944 (Dacnusa), syn. n. of Chorebus gedanensis (Ratzeburg, 1852)
dinae Burghele, 1960 (Dacnusa), syn. n. of Chorebus leptogaster (Haliday, 1839)
galba Nixon, 1944 (Dacnusa), syn. n. of Chorebus rondanii (Giard, 1904)