. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. 8 AFFECTING THE CANES. Fig. S. The Red-necked Aqrilus {Agrilus ruficoUis, Fab).. This insect was first described by the great German Entomologist Fabricius, in the year 1801, but for very many years after this nothing was known of its earlier or larval history. In 1846, Professor S. S. Haldeman contributed a paper to the "Quarterly Journal of Science and Agriculture" in which details of the injury it does to the Raspberry were first given. More recently Prof C. V. Riley, in th
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. 8 AFFECTING THE CANES. Fig. S. The Red-necked Aqrilus {Agrilus ruficoUis, Fab).. This insect was first described by the great German Entomologist Fabricius, in the year 1801, but for very many years after this nothing was known of its earlier or larval history. In 1846, Professor S. S. Haldeman contributed a paper to the "Quarterly Journal of Science and Agriculture" in which details of the injury it does to the Raspberry were first given. More recently Prof C. V. Riley, in the second volume of the American Entomologist" has given a fuller account of the opera- tions of this insect, and from this source much of the following has been condensed. In the spring-time when raspberry and blackberry patches are being pruned, the canes will often be observed to swell out in places to th« length of an inch or more in the manner shown in figure 2. This swelling is a sort of pithy gall and has been named the Raspberry Gouty Gall, E'uhi joodagra, Kiley, and is produced by the irritation caused by the presence of the larvae of the Red-necked Agrilus. The swollen portion? are not smooth like the healthy ones are, but have the surface roughened with numerous brownish slits and ridges When these ridges are cut into with a knife there will be found under each of them the passage way of a minute borer. Figure 3 represents the little creature fully grown on a magnified scale, the hair line at the side showing its natural size. It is snaall, and with a body almost thread-like and of a pale yellowish or whitish colour, but with the anterior segments flattened out, somewhat like that of the larva of the common Flat-headed Apple-tree Borer. Chrysohothris femorata, but in a less degree. The head is small and brown, the jaws black, and the tail is armed with two slender dark- brown processes or horns, each with three blunt teeth on the inner edge. ' When full grown it
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
