Crustacea: Copepoda - Cerambycoidea.com

Crossocerus megacephalus (Rossius) - Nests in rotten wood; preys on Diptera.
Crossocerus podagricus (Van der Linden) - Nest in hard dead wood; preys on small Diptera,
especially Nematocera.
Crossocerus vagabundus (Panzer) - RDB1. Nests constructed in old beetle galleries,
branched or straight, within dead timber; found where a combination of suitable nest
sites in dappled shade and damp or lush areas rich in its prey of crane flies. Formerly
sparingly widespread across lowland England, from Dorset to Lincolnshire, but has
declined very seriously.
Crossocerus walkeri (Shuckard) - Nationally Scarce B. Nest in deadwood of various
broadleaves; preys on mayflies (Ephemeroptera). Widespread but very local;
associated with rivers and streams of high water quality.
Nitela – very small black wasps, nesting in beetle burrows and other holes in dead wood and
walls or in pithy plant stems. Both of the following species are said to be common in
northern Europe.
Nitela borealis Valkeila – RDBK. Known from gardens and waste ground in the extreme
south-east of England; very common in northern and central Europe. Nest sites
include vacated beetle borings in wooden posts, as well as small holes in old walls;
stocked with bark flies (Psocoptera).
Nitela lucens Gayubo & Felton – RDBK. Generally similar to N. borealis except the nest
sites are more frequent in old walls and the species is more widely distributed in south
and south-east England.
Lestica clypeata (Schreber) – Extinct. Nest in dead wood; preys on adult Lepidoptera; 19th
C, Weybridge only.
Ectemnius borealis (Zetterstedt) – Found in the western Weald of Sussex, Hampshire and
Surrey, where first recognised in 1972, although an older specimen has been found
dated 1938. Nests in dead wood such as fence posts.
Ectemnius cavifrons (Thomson)
Ectemnius cephalotes (Olivier)* - Nest tunnels are excavated in fairly large pieces of rotten
wood, such as stumps, fallen trunks, rotting logs and occasionally building timbers;
adults attracted to umbellifer flowers. The wasps prey upon medium-sized Diptera.
Widespead in the English lowlands, scarce elsewhere - a small concentration of
records in south-east Ireland.
Ectemnius continuus (Fabricius)* - Nests in burrows within rotten wood such as old tree
stumps, fallen trunks and limbs, fence posts, even building timbers; preys upon
medium-sized Diptera. Widespead in the English lowlands, scarce elsewhere.
Ectemnius dives (Lepeletier & Brullé) - Nest tunnels excavated in dead wood and cells
stocked with flies such as syrphids and tachinids. Favour relatively open situations.
Very localised distribution, mainly south-east and Yorkshire.
Ectemnius lapidarius (Panzer)* - Nests in decaying wood, even quite small pieces; preys
upon medium-sized flies. Widespread.
Ectemnius lituratus (Panzer) - Nests in beetle burrows in a variety of dead wood, including
tree stumps and fence posts. The nest cells are stocked with medium-sized flies,
particularly calypterates. Mainly in woodlands. The adults are often found at
umbellifer flowerheads. Common in the more southern English counties but rapidly
decreases northwards.
Ectemnius ruficornis (Zetterstedt) * - Nationally Scarce B. Nest in tree stumps, old trees,
fence posts and other forms of rotten wood; cells are stocked with hoverflies and other
Diptera. Adults often found at umbellifer flowerheads. Southern half of Britain.
Reported from Co.Antrim.
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