. Annual report. Entomological Society of Ontario; Insect pests; Insects. 24 that I shall now make but a brief mention of it. It is much smaller than the preceding species, the females only ranging from half an inch to somewhat over three-quarters of an inch in length, while the males are correspondingly smaller. It is black with white mark- ings, and the antennse are usually white, with the exception of the basal joints, whence the specific name. They appear during June and July, both upon old and young trees, and in this city I have noticed them to especially attack newly transplanted trees.
. Annual report. Entomological Society of Ontario; Insect pests; Insects. 24 that I shall now make but a brief mention of it. It is much smaller than the preceding species, the females only ranging from half an inch to somewhat over three-quarters of an inch in length, while the males are correspondingly smaller. It is black with white mark- ings, and the antennse are usually white, with the exception of the basal joints, whence the specific name. They appear during June and July, both upon old and young trees, and in this city I have noticed them to especially attack newly transplanted trees. The maple being generally used as a shade tree is planted annually in large numbers, and it is while they are less vigorous from the effects of transplantation that the Xiphydria selects them as suitable for the deposition of her eggs. I have seen trees hardly more than an inch in diameter attacked. 3. Oryssus terminalis, Newman. This insect belongs also to the Uroceridse, but the abdomen is blunt and rounded at the extremity instead of terminating in a horny point. The ovipositor is concealed in the abdomen, instead of projecting therefrom and being protected by sheaths. It is very slender, hair-like, and longer than the insect itself. The insects are about as long as those of Xiphydria, but are much stouter in form. The head and thorax are black ; legs and antennse black, with markings of white; abdomen black, or more or less red ; wings clear, with a dusky patch near the tip. Active and restless i,n their motions, they might easily be mistaken for some species of wood wasps. Their habits have not hitherto, so far as I am aware, been definitely known or recorded, but specimens have been taken by me, both in the act of emerging from the trunk of a dead maple, and in the act of ovipositing therein. They appear in June. 4. Ibalia maculipennis, Hald. This curious species belongs to the family Cynipid?e, or gall-forming hymenoptera, and is much larger than any of our other specie
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
