The Alysiinae (Hym., Braconidae) parasites of the Agromyzidae (Diptera). II. The parasites of Agromyza Fallén.

Abstract

1. This paper, the second of a series, deals with the Alysiinae parasites of Agromyza Fallen in Europe. These belong to four genera of the Dacnusini (Exotela, Dacnusa, Chorebus and Protodacnusa) and two non-Dacnusine genera, Dapsilarthra and Grandia. Protodacnusa has already been treated in the previous paper (Griffiths, 1964). - 2. The majority of the Dacnusini bred from Agromyza exhibit monophagy of the first or second degree and it is considered that host specialisation has played an important part in the speciation of the group. However Dapsilarthra spp. have more extensive host-ranges, none being confined to Agrowyza. Grandia is represented by the single known species attacking Agromyza apfelbecki Strobl. - 3. The genus Agromyza is unlikely to be monophyletic and has been provisionally divided into four main groups for the purposes of this paper. Keys to the Dacnusini parasites of each of these groups are given. - 4. The host/parasite lists produced in this paper are intended to be complete and to supersede previously published lists for Europe. - 5. Seven new species are described, five in Chorebus and two in Exotela.

Nomenclatural Acts

baeticus Griffiths, 1966 (Chorebus), spec. n.
bres (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa bres
credne (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa credne
deione (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa deione
eros (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa eros
groschkei Griffiths, 1966 (Chorebus), spec. n.
hilaris Griffiths, 1966 (Chorebus), spec. n.
knautiae Griffiths, 1966 (Chorebus), spec. n.
lar (Morley, 1924) (Chorebus), comb. n. hitherto Dacnusa lar
lugubris (Nixon, 1937) (Chorebus), comb. n. hitherto Dacnusa lugubris
ninella (Nixon, 1945) (Chorebus), comb. n. hitherto Dacnusa ninella
perkinsi (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa perkinsi
pione (Nixon, 1944) (Chorebus), comb. n. hitherto Dacnusa pione
polygoni Griffiths, 1966 (Chorebus), spec. n.
resa (Nixon, 1937) (Chorebus), comb. n. hitherto Dacnusa resa
rotundiventris (Thomson, 1895) (Chorebus), comb. n. hitherto Dacnusa (Dacnusa) rotundiventris
solstitialis (Stelfox, 1952) (Chorebus), comb. n. hitherto Dacnusa solstitialis
thisbe (Nixon, 1937) (Chorebus), comb. n. hitherto Dacnusa thisbe
dryas (Nixon, 1948) (Dacnusa), comb. n. hitherto Rhizarcha dryas
laeta (Nixon, 1954) (Dacnusa), comb. n. hitherto Pachysema laeta
lissos (Nixon, 1954) (Dacnusa), comb. n. hitherto Pachysema lissos
maxima (Fischer, 1961) (Dacnusa), comb. n. hitherto Pachysema maxima
arunci Griffiths, 1966 (Exotela), spec. n.
hera (Nixon, 1937) (Exotela), comb. n. hitherto Dacnus hera
nowakowskii Griffiths, 1966 (Exotela), spec. n.
phryne (Nixon, 1954) (Exotela), comb. n. hitherto Toxelea phryne