. Bulletin. Natural history; Natural history. Mav, 1968 Stannard: TiiK Thrif; 319. Fig. 113.—Hercinolhrips femorali.'i, dorsal aspect. From White (1916). with head, segments III and IV and most of V except apex light yellow, apex of V and all of VI-VIII brown. Fore wing with a brown spot above scale, a broad median brown band, and subapical brown band; remainder of wing pale. Body setae pale yellow. Head setae moderately developed but not long. Metascutum hexagonally reticulate medially, longitudinally striate laterally. Abdominal tergite VIII with pos- terior comb of setae interrupte
. Bulletin. Natural history; Natural history. Mav, 1968 Stannard: TiiK Thrif; 319. Fig. 113.—Hercinolhrips femorali.'i, dorsal aspect. From White (1916). with head, segments III and IV and most of V except apex light yellow, apex of V and all of VI-VIII brown. Fore wing with a brown spot above scale, a broad median brown band, and subapical brown band; remainder of wing pale. Body setae pale yellow. Head setae moderately developed but not long. Metascutum hexagonally reticulate medially, longitudinally striate laterally. Abdominal tergite VIII with pos- terior comb of setae interrupted me- dially, tergite IX split for nearly entire length along the median line. Male (macropterous).—None pres- ent in the collections of the Illinois Natural History Survey. White (1916) reported that the male is similar to the female in color and general structure. Characteristics of abdominal sternal glandular areas, if any, not known to me. Abdominal tergite IX with three pairs of stout spines (Fig. 42). Superficially this species resembles Heliothrips haemorrhoidalis, but the two can be readily separated even with a hand lens by their color. Hercino- lhrips femoralis has darker legs and wings than Heliothrips haemorrhoidalis. Unlike Heliothrips haemorrhoidalis, femoralis may have been introduced into the New World. Although it is often found out-of-doors in the warm- er zones, it does not seem to occur regularly on native North American plants but rather stays on cultivated plants. It is especially fond of sugar beets. Originally the sugar beet came from the Mediterranean and eastward and the provenience of its thrips, femoralis, may be the same. I have never taken this thrips, as I have haemorrhoidalis, in natural woodlands on our continent. Before modern insecticides became widely used, femoralis was frequently found in greenhouses in Illinois. Now it and the other greenhouse species are rare in this state. White (1916) has studied the bi- ology of this thrips. Accord
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
