. Bulletin. Natural History; Natural History. Die Pi. axt Läuse, Oi! AriiiiiiAE, oi Illinois 367 Bana (Juli 10). 192 S; Eldorado (Juni 19). Elizabethtowu (20. Juni), Kansas (17. Juni), Oakwood (1. Juni), Rock Island (7), verhungert Rock State Park (5. Juli). 1929: Seymour (Juni 20), 1930. PEMPHIGUS POPULI - TRANSVERSUS Rii. EV Schweine. 48, 98, 240, 241, 330 PrmiJhigiis puptiU - triinsvei-fiu Riley, Bulletin der Vereinigten Staaten geologische und geografische Übersicht der Territorien, Vol. V, Nr. 1, 22. Januar 1879, Artikel 1, Teil I, S. 15. Die Details der hfe liistory dieser Arten sind Verj'gut Kno

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. Bulletin. Natural history; Natural history. The Pi.axt Lice, oi! AriiiiiiAE, oi Illinois 367 bana (July 10). 192S; Eldorado (June 19). Elizabethtowu (June 20), Kansas (June 17), Oakwood (June 1), Rock Island (July 7), Starved Rock State Park (July 5). 1929: Seymour (June 20), 1930. PEMPHIGUS POPULI-TRANSVERSUS Rii.EV Pigs. 48, 98, 240, 241, 330 PrmiJhigiis puptiU-triinsvei-fiUS Riley, Bulletin of the United States Geological and Geographical Survey of the Territories, Vol. V, No. 1, January 22, 1879, Article I, Part I, p. 15. The details of the hfe liistory of this species are verj' well known hecaiLse of tlie studies of Jones and Gillette (1918), who have shown that it alternates hetween poplars and the roots of various cruciferous ])lants. The win!L, fed migrants ( fimdatrigeniae) leave the galls (Fig.. Fig. 48. Leaf petiole gall on the poplar, Poiiiilus deUoides, caused by the migratory plant louse, Prmiihigus iiopuVt-transversus Riley; Oakwood, July 22, 1929. The winged adults leave the gall through the transverse slit. -X ) on pdplar.s in s]jring or summer and fly lo cruciferous plants, where the se.ii])arae are eentually ])roduced. The latter return to the trunks and branches (jf pojjlars in s])ring and produce the se.xual forms which produce eggs from which the stem mothers hatch. The stem mothers start tile galls, each of which produces a large numher of winged fe- males or migrants. We have been unable to separate the coty])ic specimens of P. rubi Thomas (187!)), which are sexuparae, from se.u])arae of P. popuU- trinisz'crsKS Kiley. The similarity in their antennae, which are quite. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division

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• booka
• bookcentury1900
• bookdecade1910
• booksubjectnaturalhistory