. Bulletin. Natural history; Natural history. Fig. 94. Mfrolhripa morgani, apterous form, dorsal aspect. 95 b Fig. 95.—Merolhrips morgani: a, head; b, prothorax. From zur Strassen (19596). THRIPIDAE Stephens (1829) In an evolutionary scale these thrips are the most advanced members of the Terebrantia (Fig. 26). They may be distinguished in eastern North Ameri- ca by the combination of the following characteristics: 1) possession of pro- jecting simple or forked sense cones on antennal segments III and IV, 2) downturned ovipositor in the female, and 3) the possession of microsetae on the wing s
. Bulletin. Natural history; Natural history. Fig. 94. Mfrolhripa morgani, apterous form, dorsal aspect. 95 b Fig. 95.—Merolhrips morgani: a, head; b, prothorax. From zur Strassen (19596). THRIPIDAE Stephens (1829) In an evolutionary scale these thrips are the most advanced members of the Terebrantia (Fig. 26). They may be distinguished in eastern North Ameri- ca by the combination of the following characteristics: 1) possession of pro- jecting simple or forked sense cones on antennal segments III and IV, 2) downturned ovipositor in the female, and 3) the possession of microsetae on the wing surfaces of winged forms. Most of the genera of the Tere- brantia belong here. The family as represented in Illinois can be divided into two subfamilies, and, in the nomi- nate subfamily into several tribes. For easy reference, however, the genera are listed herein in alphabetical se- quence regardless of subfamily or tribial 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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