This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...One or more gall-like swellings of the stem of grains or grasses denote the presence of the larva. Straw should be used up completely during the winter, for the adult insects emerge from infested stems in the spring. /. tritici and /. grande were supposed to be two distinct species, but it has been demonstrated by ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...One or more gall-like swellings of the stem of grains or grasses denote the presence of the larva. Straw should be used up completely during the winter, for the adult insects emerge from infested stems in the spring. /. tritici and /. grande were supposed to be two distinct species, but it has been demonstrated by Riley that there is here, really, an alternation of generations of one species. Both generations may be wholly or in part parthenogenetic. Eurytoma pissodis, described by Girault in Bull. Brooklyn Ent. Soc. is parasitic on the white pine weevil. Maerorileya occaiithi Ashm. has been reared from the eggs of the snowy tree cricket. Eurytoma crassineura Ashm. is parasitic on Scolytids. Evoxysoma vitis Saunders, has been reared from grape seeds. Eurytoma gigantea Walsh has been reared in Minnesota by S. Marcovitch from goldenrod gall. E. juniperinus Marcovitch was reared from deformed berries of Juniperus virginiana L. Oct. 13. (Ann. PERILAMPIDAE Antennae elbowed, fore tibiae armed with a large curved spur; bind femora not greatly enlarged; thorax strongly developed, much arched und deeply punctate; stlgmal vein developed; abdominal segments visible. Perilampus hyalinus Say occurs in Minnesota (see colored plate 1). Reported as parasitic on the pine saw fly. It is also a secondary parasite on Amelcctonus fugitivus Say. Ashmead has reared Perilampus sp. from Chrysopa cocoons. EUCHARIDAE Same as l'ertlampltlar, but stlginal vein not developed, and second abdominal segment very large, Inclosing other segments. Ovipositor well forward. In members of this family, the structure of the thorax, particularly of the scutellum, is most curiously modified. This modification with the brilliant metallic blue and green coloring which characterizes the members of the ...
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