. Bulletin. Natural history; Natural history. May, 1!)H8 Stanxakd: T Illinois 325 margin not as thickened as in detiti- cornis. This species differs markedly from denticornis in many features such as those mentioned in the key, and also in the extent of prolongation of the head, the arrangement of the acces- sory setae on the abdominal sternites, and the structure of abdominal tergite IX, particularly the setae. One char- acteristic, the small projection of an- tennal segment III, serves to distin- guish cerealium immediately from denticornis, which, by contrast, bears a large projection on se
. Bulletin. Natural history; Natural history. May, 1!)H8 Stanxakd: T Illinois 325 margin not as thickened as in detiti- cornis. This species differs markedly from denticornis in many features such as those mentioned in the key, and also in the extent of prolongation of the head, the arrangement of the acces- sory setae on the abdominal sternites, and the structure of abdominal tergite IX, particularly the setae. One char- acteristic, the small projection of an- tennal segment III, serves to distin- guish cerealium immediately from denticornis, which, by contrast, bears a large projection on segment III. Limothrips cerealium is undoubtedly an introduced species from Europe. It inhabits most of Illinois south of an imaginary line connecting Rock Island and Chicago. It causes damage to cereal grains, but in Illinois no special attempts are made to control its popu- lations. In certain years, in late June or early July, enormous flights of these insects occur, at which time they cause annoyance by biting people and en- tering houses. The life history of this thrips was described by Korting (1930). Illinois records (Fig. 115).—Col- lected every season of the year, from one to several localities in the follow- ing counties: Adams, Alexander, Calhoun, Champaign, Clark, Clin- ton, Cumberland, De Witt, Edgar, Effingham, Fayette, Gallatin, Jackson, Jefferson, Jersey, John- son, Lawrence, Logan, Macon, Marion, Mason, McLean, Monroe, Morgan, Perry, Piatt, Pulaski, Putnam, Randolph, St. Clair, Sang- amon, Tazewell, Vermilion, Wa- bash, Washington, and William- son. Limothrips denticornis Haliday The Barley Thrips Thrips I Limothrips) denticornis Hali- day (1836:445). 9, cf. Type-locali- ty.—England. Thrips kollari Heeger (1852:485). 9. Tvpe-locality.—Austria. Synony- m'ized by Uzel (1895). Thrips (Limothrips) bidens Reuter, 0. M. (1878 79:218). ?9. Type- locality.— Pargas (Parainen), Tur- ku-Pori, Finland. Synonymized by Uzel (1895). Thrips secalina Lindeman (1887:302).
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
