Phyllobius glaucus (Scopoli, 1763)

Female
Although of local occurence this species is widespread and may be common where found, there are records throughout England but the highest density is from across Wales (NBN), in Scotland a lowland species north to inverness but apparently absent from the islands(Morris, 1997). Typical habitat is woodland or wooded areas, the species is arboreal and polyphagous on a range of broadleaved trees. Morris states that in many places they have a preference for Alnus (Alder) and our single local record supports this; on 02/05/08 a pair were swept from Alnus foliage overhanging a drainage ditch below Cassiobury park. They also occur on Betula (Birch), Quercus (Oak), Corylus (Hazel), Prunus (Cherry), Sorbus (Mountan Ash), Ulmus (Elm) and Crataegus (Hawthorn). Adults from early May until the end of June in the south, further north they occur later with adults into August.

Our single record might suggest this species is of infrequent occurence around Watford but we should stress that thus far (2008) our sampling of suitable habitats has been sporadic. At this time of year glaucus may be overlooked for the often abundant and superficially similar P.pomaceus which, although notarboreal, tends to be regular among swept samples and taken for granted. The lighter coloured legs of glaucus are a good field character.

7.5-10mm. Large and strongly convex, parallel sided or weakly dilated behind middle, cuticle black, upper surface with metallic green to golden metallic scales. The only confusion should be with P.pomaceus. Head widest at very convex eyes, temples parallel, entire surface punctate with recumbent slender, pointed scales. Rostrum ridged inside scrobes which are visible from above, longitudinally depressed medially. Antennae testaceous, long (cf. P.pomaceous) and slender, scape weakly curved and gradually thickened to apex, segments 1-3 of funiculus elongate; third more than twice as long as wide, apex of segments (sometimes whole segments) and club darker, club long and slender. Pronotum transverse, evenly rounded laterally and widest at middle, without borders. Puncturation coarse, confluent in places, scales long, slender and pointed, transversely recumbent. Elytra with well developed shoulders, widest at base than pronotum. Strongly punctate striae usually obvious to apex, interstices flat with surface finely and densely punctured. Scales long and slender, some almost setae like, and pointed. Also with semi-erect, curved dark setae which are best appreciated near base, view the elytral horizon obliquely under strong light, these vary in size and are unevenly distributed. Legs pale brown to reddish, tarsi darker. All femora very strongly toothed.
Fine setae beneath femora and tibiae more dense in male (Morris, 1997).

Description taken from 2 Watford specimens at X20

Male

Female

Male
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