Keys to the adult male Chironomidae of Britain and Ireland. Volume 2, Illustrations of the Hypopygia (text-figures 114-260) and a supplement identifying sixteen species recently recorded from Britain and Ireland (text-figures 261-276) / by P. H. Langton and L. C. V. Pinder ; illustrated by Angela M. Matthews and P. H. Langton.    Far Sawrey :  Freshwater Biological Association,  2007 . 168 s.