Rhagonycha lignosa (Muller, O.F., 1764)

Occurs throughout England, Wales and southern Scotland to the Borders, further north there are many records from around the Caledonian canal, Loch Ness and Speyside areas and several from the northwest coast including Skye (Alexander). This generally common species occurs throughout the Watford area, adults are mostly arboreal and easiest recorded by sweeping tree and shrub foliage around woodland borders, parkland and wasteland. During hot weather the adults frequent umbels as well as other flowers, and early in their season may be beaten from flowering Crataegus. Depending on season the adults persist into late July or early August.

The small size and slender build, entirely dark forebody and scutellum, and testaceous elytra and appendages are distinctive in the field under a hand lens.

6-7.5mm. Head entirely black, very finely and sparsely punctate and pubescent, microsculpture just visible at X20. Clypeus flat or weakly concave between antennal insertions. Eyes convex and prominent, temples long and curved, strongly contracted to base. Maxillary palps testaceous, terminal segment elongate and broad. Antennae long and slender with all segments elongate, second shorter than first or third. Dark with three or four basal segments testaceous. Pronotum black, quadrate or slightly transverse, broadest at ill-defined lateral denticles at base. Surface very finely and sparsely punctate and pubescent, microsculptured as head. Front angles rounded, hind angles obtuse. Scutellum black, punctate and pubescent. Elytra long and slender, strongly granulate, very finely punctate and with pale semi-recumbent pubescence. Lateral margins strongly and very gently dinuate, apices separately rounded. Legs completely testaceous or with one or two apical tarsal segments darkened. Third tarsal segment conical but not lobed. Each claw longitudinally divided

Description from 2 Watford specimens at X20

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