. Bulletin. Natural history; Natural history. May, 1968 Stannard: TiiK 'I'liKips Illinois ;547 patches of brown on abdominal seg- ment II 10 9. Wings dark; on various plants nubilipennis Wings pale; on Tiiia (linden) tiliae 10. Sculpture of pronotum widely separated in front of blotch (Fig. 128), subhexa- gonally reticulate rather than trans- versely striate 11 Sculpture of pronotum occasionally slightly more widely separated in front of blotch but always more or less trans- versely striate 12 11. Wings bicolored, white and gray-brown banded annulipes Wings nearly uniformly dark gray; not yet
. Bulletin. Natural history; Natural history. May, 1968 Stannard: TiiK 'I'liKips Illinois ;547 patches of brown on abdominal seg- ment II 10 9. Wings dark; on various plants nubilipennis Wings pale; on Tiiia (linden) tiliae 10. Sculpture of pronotum widely separated in front of blotch (Fig. 128), subhexa- gonally reticulate rather than trans- versely striate 11 Sculpture of pronotum occasionally slightly more widely separated in front of blotch but always more or less trans- versely striate 12 11. Wings bicolored, white and gray-brown banded annulipes Wings nearly uniformly dark gray; not yet found in Illinois fraxinicola 12. Pronotum pale without any definite brown markings, at most with a faint cloud of brown at the anterior margin of the blotch sambuci Pronotum with brown markings within the blotch, or blotch entirely brown 13 13. Pronotal blotch uniformly and complete- ly brown; only slightly and evenly in- cised along the posterior margin baptisiae Pronotal blotch with brown coloration, irregularly outlined or brown only in patches; if predominantly brown, pos- terior margin deeplv incised by yellow 14 14. Abdominal segment VII completely brown in sharp contrast to segment VI variabilis No abdominal segment completely dark in color in sharp contrast to the other segments 15 15. Fore wing with two additional setae at the apex behind the principal longi- tudinal vein; on hops beachae Fore wing with only one or none of these additional setae 16 16. Fore wing without setae behind the prin- cipal veins; on nettle; not yet found in Illinois apicalis Fore wing with one seta behind the prin- cipal vein 17 17. Antennal segment III gray, interruptus Antennal segment III light yellow at base 18 18. Posterior setae of prothorax moderately long; on wild four-o'clock flowers campestris Posterior setae of prothorax shorter; not yet found in Illinois zebrae Sericothrips annulipes Hood Sericolhrips annulipes Hood (1927c: 211). 9, d". Type-locality.—Ithaca, New York. Fema
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
