Aphodius pusillus (Herbst, 1789)
Found throughout England, Wales and Scotland (Jessop) in various types of dung but a local species and, in our experience, usually found in small numbers. Adults occur from the first warm days in March or April and are present until mid summer, then again during September and October and occasionally in flood refuse in the winter. Locally they occur in horse dung in Whippendell wood during the spring but some effort needs to be made in order to find them as, at least during 2007, numbers were very small.

3-4.5mm. Antennal club black but usually appearing grey due to pubescence, remaining segments brown. Head black, raised anterior margin dark brown, not produced laterally in front of eyes, anterior margin rounded, without distinct angle. Clypeus without transverse ridge but with broad, poorly developed, tubercles in male, punctate throughout and rather dull due to microsculpture. Pronotum glabrous, finely bordered laterally and basally and obscurely lighter behind front angles. Punctured throughout, sometimes a little more densely so near the lateral edges, punctures of two distinct sizes both of which are obvious at X20, larger ones about three times the size of the smaller ones. Evenly rounded i.e. not sinuate, around posterior angles. Scutellum equilateral or only slightly elongate (cf. A.haemorrhoidalis). Eltra dark brown becoming lighter towards apex ¹, shining throughout. Striae narrow, about 0.25X width of interstice and obscurely punctate, about as shining as interstices. Interstices finely punctate and convex, especially towards apex. Striae 3-8 variously fused at apex, none of these are carinate. Raised margin near apex very narrow, much narrower than second interstice near apex. Legs dark brown, tarsi lighter. Basal segment of posterior tarsi shorter than next three together.

Description from 4 Watford specimens at X20

¹ A.coenosus Panz. has an obscure red mark on the apical half of the fourth interstice.