. Bulletin. Natural history; Natural history. May, 1968 Stannard: The Thrips f)F Illinois 387 Prothoracic epimeral sclerites each con- sisting of the usual two divisions .38 38. Antennal segments I and II each pro- duced on inner ventral apex making 42. these segments asymmetrical; not yet found in Illinois Acrosothrips Antennal segments I and II more or less symmetrical (Fig. 198) (in part) Acanthothrips 43. 39. Tube hairy with relatively long setae (Fig. 191); large black thrips 40 Tube not particularly hairy, setae rela- tively much shorter; thrips of various sizes and colors 42 44. 40. Max
. Bulletin. Natural history; Natural history. May, 1968 Stannard: The Thrips f)F Illinois 387 Prothoracic epimeral sclerites each con- sisting of the usual two divisions .38 38. Antennal segments I and II each pro- duced on inner ventral apex making 42. these segments asymmetrical; not yet found in Illinois Acrosothrips Antennal segments I and II more or less symmetrical (Fig. 198) (in part) Acanthothrips 43. 39. Tube hairy with relatively long setae (Fig. 191); large black thrips 40 Tube not particularly hairy, setae rela- tively much shorter; thrips of various sizes and colors 42 44. 40. Maxillary stylets, when retracted, close together within head. . .Megalothrips Maxillary stylets, when retracted, far apart within head 41 41. Antennal segment III longer than the combined length of segments I and II Megathrips 45. Antennal segment III much shorter than the combined length of segments I and II; head and prothorax as in Fig. 182; known only from Florida C' Tube greatly swollen at base, parabolic in outline; not yet found in Illinois Pygothrips Tube cylindrical; if somewhat swollen at base, not parabolic in outline 43 Tube strongly hexagonally reticulate dor- sally (Fig. 188); not yet found in Illi- nois Eschatothrips Tube with dorsum smooth or at the most weakly sculptured 44 Fore wings with hexagonal reticulations on upper surface (Fig. 1926); not yet found in Illinois Stictothrips Fore wings without hexagonal reticula- tions, occasionally marked with short linelike sculpture but not forming geo- metric designs, or without wings .45 Posterior margin of mesopraesternum not as wide as width of either anterior. Fig. 186-191.—Abdominal terminalia of species indicated, representatives of the Phlaeo- thripidae showing types of tubes (abdominal segment X).. 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 th
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
