Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . ey sometimes become fastened to thetrees, and die without being able to draw their borers outagain. The abdomen of the male is very slender. Pimpla has the ovipositor half as long as the abdomen. Cresson is a parasite on Clisiocampa. The genus Troy us leads to Ichneumon. The antenmu areshorter than the body; the abdomen is slightly petiolate, fusi-form, and the second subcostal cellis quadrangular. Troyns (sBrulle is tawny red,
Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . ey sometimes become fastened to thetrees, and die without being able to draw their borers outagain. The abdomen of the male is very slender. Pimpla has the ovipositor half as long as the abdomen. Cresson is a parasite on Clisiocampa. The genus Troy us leads to Ichneumon. The antenmu areshorter than the body; the abdomen is slightly petiolate, fusi-form, and the second subcostal cellis quadrangular. Troyns (sBrulle is tawny red, and is a para-site of Papilio Asterias. The genus Ichneumon (Fig. 129)is one of great extent, probablycontaining over three hundred spe-cies. The abdomen is long amislender, lanceolate ovate, slightlypetiolate. The second subcostal cellis five-sided, and the ovipositor iseither concealed or slightly snttirahs Say is a very common form, and has beenreared in abundance from the larva of the Army-worm, Leu-cania unipuncta. The body is pale rust-red, with black sutureson the thorax. Another common species, also parasitic on the. ICHNEUMONID^E. 197
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectinsects
