Aderus populneus (Creutzer in Panzer, 1796)         Notable B

A widespread and locally common species across southeast England with many records from East Anglia, the most northerly record is from south Yorkshire (NBN). Although the adults fly nocturnally and so may be found in a variety of situations they are typically associated with a range of broadleaved trees in which the larvae are thought to feed including Oak, Lime, Plane, Salix spp. and the dry, red rotten heartwood of Horse Chestnut. Adults have been recorded throughout the year and may be found by beating deciduous trees and hedges around woodland, scrub and gardens. Also recorded from heaps of decaying vegetation, manure and (adults) feeding on cobwebs (Hyman and Parsons). They fly readily to light and are a regular visitor to MV in Watford town centre from may to july, they are occasionally found indoors resting on walls or ceilings during the day.

1.5-2mm. Entirely testaceous with the head darker, generally black. Antennae strongly pubescent from fourth segment, segments 2 and 3 short; 3 about half the length of 4. Insertions in front of eyes, separated by about the length of segment 1. Terminal segment of labial palpi dilated, broadly triangular. Eyes large, occupying whole side of head including lateral part of hind margin. Pronotum parallel sided in basal half, strongly narrowed anteriorly and posterior margin produced either side of middle and at hind angle. Weakly depressed basally. Elytra widened behind middle and strongly rounded posteriorly. Entire upper surface punctate and with dense golden recumbent pubescence, that on elytra forming a pattern typically oblique from humerus to suture and behind middle. Legs long and slender, without teeth or obvious spines. Tarsi 5-5-4, pro and meso pseudotetramerous with third segment bilobed. First segment long, especially on hind tarsi where it is 1.5 times the length of 2-4 combined.

Description taken from three Watford specimens examined at X40.