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Cacopsylla affinis Family: Psyllidae Cacopsylla is a large and difficult genus with genal cones and a pterostigma; many species cannot be reliably identified without examining the genitalia. C. affinis is almost identical to the extremely common C. melanoneura, from which it can be distinguished only by the male genitalia. It also generally has narrower spinule-free bands along the veins. It can also have the forewing membrane rather yellowish (right), which melanoneura does not. Previously known as Psylla subferruginea.   Locally common species on birch and hawthorn across the UK. Length 3-3.5 mm Adult: all year, overwintering.
	Adult female: Huddersfield (April 2008) ©Joe Botting
Adult male: Huddersfield (November 2008) ©Joe Botting	Mating pair (cf. affinis): Huddersfield (April 2008) ©Joe Botting