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HYMENOPTERA, Vanhorniidae (Proctotrupoidea) -- <Images> & <Juveniles> Please refer also to the following link for further details: Vanhorniidae = Link 1 Description & Statistics
Vanhorniidae. -- There is a single North American species, Vanhornia
eucnemidarum Crawford, which is a parasitoid of the larvae of eucnemid
beetles. The mandibles in this family are exodont, antennae are inserted
just above the clypeus and the body is about 6.2 mm long (Masner 1993). The
metasoma has almost all of its segments fused to form a large sheath. The ovipositor is contained in a ventral
groove on the metasoma, with its apex pointing anteriorly. Vanhornia eucnemidarum Crawford is a parasitoid of the larvae of
Eucnemidae (Coleoptera) in mature maple trees (Acer spp.). The family
has one genus with about 6 species reported by 1993 (Masner 1993). The support of the metasoma was discussed by Mason (1983). He & Chu (1990) described one species
from China, and Deyrup (1985) gave
details of the biology of V.
eucnemidarum. The family was represented by only one North American genus and
species, Vanhornia cucnemidarum
Cwf. in 1940 (Clausen 1940/1962). The parasitoid was reared from the cells
of larvae of the Coleoptera family Eucnemidae in decaying wood (Crawford
1909). At that time no biological
studies were made. =
= = = = = = = = = = = = = = References: Please refer to
<biology.ref.htm>, [Additional references may be
found at: MELVYL
Library ] Crawford, A. W.
1909. A new family of
parasitic Hymenoptera (Vanhorniidae).
Proc. Wash. Ent. Soc. 11:
63-4. Hedquist,
K.L. 1976. Vanhornia
leileri n.sp. from
central Sweden (Hymenoptera: Proctotrupoidea, Vanhorniidae). Entomologica Scandinavica 7: 315-316. |