XVI. Monor/raph of the Britisli species belonging to the Hemiptera-Homoptera,/«»<?'/y Psyllidte; together xoith the description of a genus ichicJi may be ex-pected to occur in Britain. Bj John Scott. [Read 1st March, 187G.] I HAVE been induced to undertake the present Monograph for two reasons, viz. : first, because such a thing has not previously been attempted, and I therefore thought it desiral)le for the sake of science to bring together and de-scribe all those species in my own collection as well as those in the collections of others which have been kindly lent for this purpose; secondly, because the Catalogue now in course of publication by the Entomological Society of London will thus be rendered more complete. I have also added translations of the original descrij^tions of some species which I have not seen, but which were taken by Messrs, Haliday and Walker, and forwarded to Dr. Forster at Aix, where they appeared in the " Verhandlungen des naturhistorischen Vereins der preussischen Rheinlande " for 1848. That author's generic divisions are natural and easy of recognition, but his diagnoses of the various species are meagre in the extreme, and, in many instances, not sufficient to lead to their identity. The same remarks also apply to the descriptions of JMeyer-Diir, published in the "Mitthcilungen der schweizerischen entomologischen Gesellschaft," vol. iii. On the other hand. Dr. Flor, in his " lihynchoten Livlands," vol. ii., and in a paper published at Moscow in 1861, under the title " Zur Ivenntniss der lihynchoten," has more than compensated for the in-completeness of the others by the elaborate descriptions he there gives. He is pre-eminently the man in this group, and his works have afforded me valuable assistance in determinating between species Avhere I had any doubt. I have followed other authors by placing this group where it now stands, but I am not prepared to say that this is its true position, as it possesses some points in common with the true Cicadidce. TRANS. ENT. SOC. 187G.— PART IV. (dEC.)
XVI. Monograph of the British species belonging to the Hemiptera-Homoptera, family Psyllidæ; together with the description of a genus which may be expected to occur in Britain
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