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Trioza curvatinervis Family: Triozidae A distinctively-coloured species of a large and difficult genus. Although as in many psyllids, the colour varies seasonally, the rust-red, black and cream patterning of this species is unusual. The black genal cones are at least 0.65 times the vertex length, and the wing membranes lack spinules. Note the length and curvature of the outermost vein. This species is uncommon but occurs throughout the UK. It is associated with various willows, but overwinters on conifers and other evergreens. Adult: ? Length 3.5-4 mm

Adult: Huddersfield (February 2008) ©Joe Botting