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Following the latest government announcement concerning the current Covid-19 pandemic the Society headquarters at Mansion House has now closed.

Where possible emails will be monitored, any urgent enquiries should be forwarded to

Membership applications will be put on hold until further notice.

Our "identify that insect" service will continue, but our Director of Science cannot accept any physical samples to inspect during this time.

Our Librarian will not have access to our collections from home, but will be happy to try and locate references available to download from the internet.

All events and meetings have been cancelled until further notice

We hope that everyone stays well and we hope that normal business can resume soon for everyone, thank you for your understanding during this difficult time that the world finds itself in.

Kirsty Whiteford - Registrar

Psylloidea (Nymphal stages) Hemiptera, Homoptera

RES Handbooks for the identification of British Insects. Volume 2 part 5 (b).

I.M.White and I.D.Hodkinson, 1982, 50pp.

The handbook to the adult British Psylloidea (Hodkinson & White, 1979) gives a general introduction to the psyllids and lists those species for which the nymph has been described. It should be consulted for information on the distributions and biology of the British species. Earlier nymphal descriptions, such as those of Scott (1878, 1879, 1880a,b, 1881, 1883 a,b,c) were mainly colour descriptions of little taxonomic significance although Löw (1874, 1876, 1879, 1886) occasionally presented ouline drawings. In a later paper LÖw (1884) summarised the literature on psyllid nymphs.

The first detailed nymphal descriptions of taxonomic value were those of Ferris (1923, 1925 an 1926) who recognised two morphological forms, the 'psylline' and 'triozine' types. Rahman (1932) later expanded thi sclassification and recognised a further group of nymphs, the so called 'pauropsylline' type although this latter group is variable and has little basis in reality (White, 1980). Recently, Mathur (1975) in his account of the 'Psyllidae of the Indian Sub-continent' sets  baseline standard for nymphal descriptions.

The only keys to nymphal psyllids, covering more than a spoecies complex, separate the species groups of Psylla (Ossiannilsson, 1970, Loginova, 1978) and the Swedish species of Psylla (Ossiannilsson, 1970). Keys to families and genera have not previously been published.

This work cover final (5th) instar nymphs only. However, if the identity of the host plant is known it should be possible to determine earlier instars with a reasonable degree of certainty. A complet elist of host-plants is given by Hodkinson & White (1979)

  • This handbook has some slight damage to the cover, hence the reduced price.

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