. Bulletin. Natural history; Natural history. 530 Illinois Natural History Survey Bulletin \'(.l. 29, Art. 4. Fig. 305.—Oedaleolhrips species, lateral aspect, showing ant-mimicing form. Oedaleofhrips hookeri Hood Oedaleothrips hookeri (19166:64). 9. Type-locality.—Dallas, Texas. Oedaleothrips campestris Hood (1941: 190). 9, cf. Type-locality.—El Campo, Texas. New synonymy. Female (apterous).—Length dis- tended nearly .3 mm. Color predomi- nantly dark blackish brown. Antennal segments I and II light yellow be- coming yellowish brown in segment III. Tube yellow to yellowish tan ex- cept tip whic
. Bulletin. Natural history; Natural history. 530 Illinois Natural History Survey Bulletin \'(.l. 29, Art. 4. Fig. 305.—Oedaleolhrips species, lateral aspect, showing ant-mimicing form. Oedaleofhrips hookeri Hood Oedaleothrips hookeri (19166:64). 9. Type-locality.—Dallas, Texas. Oedaleothrips campestris Hood (1941: 190). 9, cf. Type-locality.—El Campo, Texas. New synonymy. Female (apterous).—Length dis- tended nearly .3 mm. Color predomi- nantly dark blackish brown. Antennal segments I and II light yellow be- coming yellowish brown in segment III. Tube yellow to yellowish tan ex- cept tip which is brown. Anterior of pelta, an anterior spot on each side of abdominal segment II, and a spot on each side of abdominal segment V white. Body setae colorless. Head bulged, sharply constricted at neck, hexagonally reticulate at base. Eyes prolonged ventrally much as in Nesothrips (Bolothrips) bicolor. Post- ocular setae dilated. Antennal seg- ment III with one inner and one outer sense cone, segment VIII constricted at base, pedicellate. Prothorax with longitudinal stria- tions confined to the lateral margins, major setae dilated. Metanotum (Fig. 306) with some concentric rings com- pletely encircling the raised median portion. Fore tarsi each armed with a small tooth. Abdominal tergite IX with poste- rior setae dilated, the lateral pair near- ly as long as tube. Tube constricted at apex. Male (apterous).—Unknown to me. Probably similar to female in most respects. All the specimens I have seen— which are from Illinois, Oklahoma, and Arkansas—could be assigned to either hookeri or to carnpestris, being intermediate to the two. Considering that some color variation might well occur in a wide-ranging species, I be- lieve it is reasonable to sink campestris under hookeri. Certainly Hood did not present much evidence that the two were different species. He stated that they "may be separated by certain details of coloration and by the form of the ; The
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