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Cacopsylla brunneipennis
Family: Psyllidae

 Cacopsylla is the most complex of all UK psyllid genera, and many species require dissection to separate them.

C. brunneipennis is a complex species with two colour morphs - the forms typica (brown wings) and klapaleki (clear wings) - although this terminology is disputed by some authors. Females can be relatively easily recognised by the greatly overhanging top section of the genitalia, but males need dissection to be certain. The genal cones are long and slender. Recently emerged adults are much paler in colour than mature adults (below).
   
A locally common species found on Salix spp. across the UK. Compare with C. melanoneura.

Adult: All year
Length ~4mm
 Cacopsylla brunneipennis
Adult female, form typica: Kent (February 2009) ©John Jeffery
Cacopsylla brunneipennis Cacopsylla brunneipennis
Teneral female, form typica: N. London (May 2008) ©Tristan Bantock Adult female, form typica: Huddersfield (February 2008) ©Joe Botting
Cacopsylla bruneeipennis klapaleki
Adult male, form klapaleki: Huddersfield (February 2008) ©Joe Botting