. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. 67. very similar in shape and colouring to those of the preceding sub-family, but of smaller size and having the ovipositor exserted and sometimes quite long. A common species is Cryptus extrematis which I have frequently bred from the cocoons of our large moth Telea polyphemus. Figure 29 shows the female and Figure 30 a cross-section of the moth's cocoon, indi- cating how the cocoons of the parasite lie side by side within it closely packed. The genus contains a great many species, as
. Annual report - Entomological Society of Ontario. Entomological Society of Ontario; Insect pests; Insects. 67. very similar in shape and colouring to those of the preceding sub-family, but of smaller size and having the ovipositor exserted and sometimes quite long. A common species is Cryptus extrematis which I have frequently bred from the cocoons of our large moth Telea polyphemus. Figure 29 shows the female and Figure 30 a cross-section of the moth's cocoon, indi- cating how the cocoons of the parasite lie side by side within it closely packed. The genus contains a great many species, as does also the genus Phygadeuon, the species of which differ chiefly in having the ovipositor shorter. The genus Hemiteles contains small species with incomplete areolet, which are said to be secondary parasites parasites of parasites, while the species belonging to Pezomachus are wingless and ant-like in shape and may be found upon the ground or on foliage. Ophionin^.—The species included in this sub-family usually have the ovipositor short, and they differ from the rest of the Ichneumonidae in having the abdomen compressed laterally, so that it becomes sickle-shaped. Some of the larger forms show this in a marked degree. The typical genus Ophion contains large yellow insects of which some are very abundant. Our largest species is Ophion macrurum(Figure 31) which is a parasite of the caterpillar of the large American silkworm moth {Telea poly- phemus). The larva of the ophion is a large, stout grub, which when full grown spins a dark brown cocoon which almost fills the cocoon of the moth, and from which the fly emerges by cutting a circular door at one end. 0. bilineatum infests the White Miller moths, while 0. purgatum (which has two yellow specks in one of the cells of the anterior wing) is a x^arasite of the army worm. Thyreodon morio is a fine insect of nearly the size and shape of 0. macruruvi, but of a deep black colour, with dark, smoky wings and yellow antennse. The g
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
