. Bulletin. Natural history; Natural history. May, 1968 Stannard: Tiif. Thrips of Illinois 509 Thorax smooth, not sculptured, de- generate as is typical of apterous forms. Prothorax with all major setae well developed, all about the same size, all dilated. Fore tarsi unarmed. Pelta as in Fig. 285. Wing-holding setae not differentiated, dorsal ab- dominal setae, except terminal tube setae and minor setae, usually dilated. Tube short. Allothrips flavus Watson (1945:35). Nomen nudum. Referred to Allo- thrips nubillicauda by Stannard (1955a). Female (apterous) (Fig. 286).— Length distended m
. Bulletin. Natural history; Natural history. May, 1968 Stannard: Tiif. Thrips of Illinois 509 Thorax smooth, not sculptured, de- generate as is typical of apterous forms. Prothorax with all major setae well developed, all about the same size, all dilated. Fore tarsi unarmed. Pelta as in Fig. 285. Wing-holding setae not differentiated, dorsal ab- dominal setae, except terminal tube setae and minor setae, usually dilated. Tube short. Allothrips flavus Watson (1945:35). Nomen nudum. Referred to Allo- thrips nubillicauda by Stannard (1955a). Female (apterous) (Fig. 286).— Length distended mm. General Fig. 285.—Allothrij)!! megacephalus, pelta. Female (brachypterous?).— Length distended over mm. Simi- lar to apterous female with the follow- ing exceptions. Eyes larger. Ocelli present. Pterothorax not degenerate. (Wings or wing pads apparently re- moved in the single specimen in our collection.) Wing-holding setae well developed. Male (apterous).—Length dis- tended about mm. Similar to fe- male except not as dark brown, often antenna] segments I and II yellowish brown. Fore tarsi (Fig. 149) each armed with a strong tooth. Fore femora often enlarged. This dark brown species can be easily distinguished from nubillicauda by the characteristics of the cheek se- tae as indicated in the foregoing key. Allothrips megacephalus has been found in all parts of the state under dead bark, especially of oak trees. Illinois records.—Collected from early April to the middle of November, from one to several localities in the following counties: Adams, Calhoun, Champaign, Crawford, Cumber- land, Edgar, Fulton, Grundy, Hardin, Jefferson, Kankakee, La Salle, Lake, Mason, Morgan, Perry, Randolph, Rock Island, Sangamon, Union, Vermilion, and Whiteside. Allothrips nubillicauda Watson Allothrips )iuf)illicauda Watson (1935: 60). 9, d". Type-locality.—Gaines- ville, Fig. 28fi. pect. AUolhrips mibillirauda, dorsal as-. Please note that these images are ext
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