. Bulletin. Natural history; Natural history. May, 1968 Stannard: The Thrips of Illinois 465 Abdominal tergites without differen- tiated wing-liolding setae. Most lateral setae on abdominal tergites dilated (rarely blunt or pointed). Abdominal tergite IX (Fig. 53) with major setae not as long as tube, pointed. Tube relatively long, stout at base. Female (macropterous).—Length distended about mm. Color orange- yellow with brown areas somewhat like dark phase of brachypterous fe- male. Brown: much of head especially in region of eyes, mesothorax, sides of abdominal tergite II, and sometimes
. Bulletin. Natural history; Natural history. May, 1968 Stannard: The Thrips of Illinois 465 Abdominal tergites without differen- tiated wing-liolding setae. Most lateral setae on abdominal tergites dilated (rarely blunt or pointed). Abdominal tergite IX (Fig. 53) with major setae not as long as tube, pointed. Tube relatively long, stout at base. Female (macropterous).—Length distended about mm. Color orange- yellow with brown areas somewhat like dark phase of brachypterous fe- male. Brown: much of head especially in region of eyes, mesothorax, sides of abdominal tergite II, and sometimes terminal antennal segments. Wings light brown. Similar in structure to brachypter- ous female with the following excep- tions. Eyes (Fig. 246) slightly larger but also with less than a dozen dorsal facets. Ocelli present. Wings fully de- veloped, fore wings without accessory fringe cilia. Abdominal tergites with wing-holding setae developed, curved or slightly sigmoidal. Male (brachypterous).—Length distended about" mm. Similar in. Fig. 246.—HopMlirii»i piryandei, 9 ma- cropterous, head and protliorax. color and structure to brachypterous female with the following exceptions. Usually light in color but occasionally with brown on sides of abdominal ter- gite II. Most males appear to be major forms having the fore legs and pro- thorax enlarged. Fore tarsi each with a broad, stout tooth. Abdominal ster- nite VIII with a median glandular area which varies from a small circle to oval to transversely elongate even in a single population. Abdominal ter- gite IX (Fig. 52) with major lateral posterior setae reduced in size. This distinctive species may be sep- arated from its congeners in Illinois by the small, bulged eyes, the lanceo- late form of antennal segment VIII, the reduction of the prothoracic an- teromarginal setae, and by color. According to Hood (1927e) the type specimens were apterous, but all of the more than 500 specimens in our collection from Illinois a
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
