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THE METAMORPHOSIS AND BIOLOGY OF RHYNCHAENUS ALNI L. (COLEOPTERA)
Author(s) -
OLDHAM JOHN N.
Publication year - 1928
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1928.tb07784.x
Subject(s) - biology , pupa , larva , insect , metamorphosis , host (biology) , genus , zoology , botany , ecology
Summary. The leaf‐mining habits of the species of the genus Rhynchaenus (syn. Orchestes ) are well known and Rh. alni L. was found in Warwickshire, England, to be causing a considerable amount of damage to the foliage of elm trees through the mining of the larvae and feeding of the adults. This species is known to attack both Ulmus campestris and Alnus glutinosa , and a historical review of the literature dealing with the beetle has been written in an attempt to elucidate the misunderstandings and settle the controversy concerning the host plant and specific name of the insect. Brief descriptions of the adult and egg have been given. The first stage larva, which differs from later stages, has been shortly described, while a note has been added on the intermediate stages. The external morphology of the full‐grown larva and of the pupa has been described in detail. The insect has but one generation in the year, in the Warwickshire area, and the life history and general biology have been discussed. During the investigations it was observed that a considerable number of hymenopterous parasites were attacking this insect. From material gathered, eight distinct species of parasites have been reared, and identified from Rh. alni L. of which seven belong to the Chalcidoidea and one to the Ichneumonoidea.