. Bulletin. Natural history; Natural history. Nov., 1980 Irwin & Lyneborg: The Genera of Nearctic Therevidae 239 Thorax. — np 3, sa 2, pa 1, dc 1-2, sc 2; all thoracic setae pale; mesonotal pile in both sexes of two types: one is long, appressed, pale, scalelike, and the other is short, erect and pale or dark; prostemum has long, whitish pile in and around central depression. Wing. — Cell ma closed; veins Ri and R5 equal in length; cell r^, X as long as wide at apex. Legs. — Fore coxa usually has 3 setae on anterior surface: 2 on apical half and 1 on basal half of anteroexterior ma
. Bulletin. Natural history; Natural history. Nov., 1980 Irwin & Lyneborg: The Genera of Nearctic Therevidae 239 Thorax. — np 3, sa 2, pa 1, dc 1-2, sc 2; all thoracic setae pale; mesonotal pile in both sexes of two types: one is long, appressed, pale, scalelike, and the other is short, erect and pale or dark; prostemum has long, whitish pile in and around central depression. Wing. — Cell ma closed; veins Ri and R5 equal in length; cell r^, X as long as wide at apex. Legs. — Fore coxa usually has 3 setae on anterior surface: 2 on apical half and 1 on basal half of anteroexterior margin, the latter rarely missing; hind femur has 6-8 anteroventral setae. Abdomen. — Rather slender, gradu- ally tapering posteriorly from segment 2; male dorsum convex or somewhat flat- tened, densely covered with whitish-gray tomentum and whitish pile; female dor- sum yellowish, subshiny, frequently with. Fig. 148-156. — Arenigena spp. 148-155. — A. semilaria (Coq.) mole terminalia. 148. — Gonocoxites with appendages (left gonostylus omitted) and hypandrium In ventral view. 149. — Rigiit gonocoxite with appendages and aedeagus in dorsal view. — Left gonocoxite in lateral view. 151. — Aedeagus in lateral view. 152. — Epandrium with appendages in dorsal view. 153. — Epandrium with appendages in ventral view. 154. — Tergite 8. 155. — Slernile 8. 156. — A. morcida-group right gonocoxite with ap- pendages and aedeagus in dorsal view. Scale: 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 the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
