. Bulletin. Natural history; Natural history. Fig. 162.—Chirolhripoldes dendropogonus, 9, posterior margin of abdominal sternite VIII showing fingerlike projections. Redrawn from unpublished sketch made from holotype by Miss Kellie O'Neill. Fig. Types of antennal segments: 163, terminal segments of Poly- •phemolhripa IA del olh rips I hradleyi, showing partial fusion of segments VII and VIII, SC- sense cone; 164, antennal segment III of Agrothripsi lanlilhuf of Kan- sas, showing shelf-like rim near base; , terminal segments of Polyphemo- Ihrips lAdelolhrips) ambi- tus showing clo
. Bulletin. Natural history; Natural history. Fig. 162.—Chirolhripoldes dendropogonus, 9, posterior margin of abdominal sternite VIII showing fingerlike projections. Redrawn from unpublished sketch made from holotype by Miss Kellie O'Neill. Fig. Types of antennal segments: 163, terminal segments of Poly- •phemolhripa IA del olh rips I hradleyi, showing partial fusion of segments VII and VIII, SC- sense cone; 164, antennal segment III of Agrothripsi lanlilhuf of Kan- sas, showing shelf-like rim near base; , terminal segments of Polyphemo- Ihrips lAdelolhrips) ambi- tus showing close union of segments VII and VIII. 12. Antennae six segmented, terminal seg- ment broad and long, formed by union of morphological segments VI-VIII (Fig. 161); known from southern Flori- da to southeastern Texas Pygidiothrips Antennae seven or eight segmented. .13 18. Antennae seven segmented, that is, last two morphological segments partially or completely fused (Fig. 163) 14 Antennae eight segmented, last two mor- phological segments completely sepa- rated by a continuous broad or fine suture, segment VIII often freely mov- able 24 14. Antennal segment II with dorsal sensori- um placed near the middle of that seg- ment; not yet found in Illinois Williamsiella Antennal segment II with dorsal sensori- um placed near the apex of that seg- ment 15 15. Antennal segment III decidedly smaller than segments II and IV separately North American species of Phthirothrips Antennal segment III subequal to or longer than segments II and IV sepa- rately 16 Ifi. Maxillary stylets when at rest just barely retracted into the head capsule (Fig. 279 and 282) 17 Maxillary stylets when at rest retracted far into the head capsule 18 17. Pelta with posterior portion uniformly sclerotized, not broken into tiny plate- lets (Fig. 166 and 167) (in part) Sophiothrips Pelta with posterior portion fractured into tiny sclerotized platelets (Fig. 168) (in part) Zaxenothrips 18. Cheeks with a close series
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