Notiothereva bezzii (Kröber), Krober

Webb, Donald W., 2005, Revision of the Neotropical Stiletto Fly Genus Notiothereva Metz & Irwin (Diptera: Therevidae: Therevinae), Zootaxa 1059, pp. 1-32 : 22-25

Notiothereva bezzii (Kröber)

( Figs. 22–29 , 44).

bezzii Kröber (1911: 499 male fem. key, 501 orig. desc.) ( Psilocephala ); Metz & Irwin (Metz et al. 2003:244 listing, comb. change, trans. orig. desc.) ( Notiothereva ). Type locality Saman, Peru. Lectotype male in USNM.

Diagnosis. Like Notiothereva argentina and N. brunnipes in having the frontal setae absent lateral to antennal base; parafacial lacking setae; and the gena with an anterodorsal patch of short, dark setae. Like N. brunnipes in having the halter knob yellow; fore­ and midcoxa with macrosetae dark reddish brown; and the posterior margin of male sternite 8 ( Fig. 24 ) slightly emarginate. It differs from N. brunnipes in having the forefemur with anterodorsal macrosetae; cervical sclerite lacking setae; and the female frons with dark reddish brown, glossy calli.

Description of male.

Morphometric variation (n=10).

Body length 5.0–7.7, 6.2 mm.

Head. Length 0.76–1.04, 0.89 mm. Frons pruinescence whitish gray, dense with dorsal area of brownish gold pruinescence; setae brown to dark brown, elongate, absent lateral to antennal base. Antenna dark yellow, second and third flagellomeres dark brown (dark yellow, scape, pedicel and second and third flagellomeres dark brown, MEI 147403, 090052; dark brown, scape and pedicel pruinescence gray, MEI 090050); antenna/head length 0.62–0.72, 0.65; scape length 0.16–0.20, 0.17 mm, width 0.10–0.14, 0.12 mm, length/width 1.1–1.7, 1.4, scape/pedicel length 1.8–3.0, 2.2, scape/flagellum width 0.7–0.9, 0.8, setae dark reddish brown, elongate; pedicel length 0.06–0.08, 0.08 mm, length/width 0.5–0.8, 0.7, setae dark reddish brown, short; flagellum length 0.30–0.42, 0.33 mm, width 0.13–0.18, 0.16 mm, length/width 1.9–2.4, 2.1, flagellum/scape length 1.9–2.1, 2.0. Parafacial pruinescence white, dense; setae absent. Maxillary palpus yellow, pruinescence white (yellowish brown, MEI 090052; brown MEI 0 90052, 147403), length 0.28–0.52, 0.39 mm, length/width 4.0–8.3, 6.2; setae white, elongate. Genal setae white, elongate with anterodorsal patch of short, black setae (indistinguishable on MEI 0 90050, 090052). Occipital setae white, elongate, sparse to absent dorsally; macrosetae dark brown, scattered at end of row extending from postocular macrosetae.

Thorax. Macrosetae 3 np, 1–2 sa, 1 pa, 1–2 dc, 2 sc. Mesonotum pruinescence gray with several lines of brown pruinescence; vittae indistinct; setae dark brown, elongate, erect intermixed with white, elongate setae. Postpronotal lobe setae white with dark reddish brown macrosetae. Cervical sclerite lacking setae. Pleuron pruinescence gray, dense; setae white, elongate on propleuron, anepisternum, katepisternum, laterotergite, metanepisternum, and scutellum (setae dense posterolaterally, occasionally dark brown to black MEI 090050–1). Wing. Membrane hyaline with gray brown to dark brown spot at rm, fork of Rs and R4+5, across apical margin of cells br, bm, and dc with a small area of gray in cells r 2+3, r 4+5, dc, m 1, m 2 (gray area absent MEI 0 90051, 147399); venation pale brown; length 4.0–6.0, 4.9 mm, length/width 2.7–3.4, 3.0; pterostigma dark brown; m3 closed, petiolate. Halter knob pale yellow. Legs. Coxa pruinescence white, dense; setae white, elongate; apical macrosetae dark reddish brown. Femora dark reddish brown, pruinescence white; ventral setae white on fore– and midfemora; ad 1–2:0:0, av 1–3:1–5:2–6, pv 0–2:0–5:0–6. Tibiae dark yellowish brown, apex dark reddish brown. Tarsi dark brown.

Abdomen. Cuticle orange brown, pruinescence white, dense; dorsal and lateral setae white, elongate. Terminalia (MEI 147402). Reddish brown, pruinescence white. Tergite 8 ( Fig. 23 ) setae pale yellow. Sternite 8 ( Fig. 24 ) quadrate, anterior margin truncate, sides rounded; posterior margin slightly emarginate; setae pale yellow, absent medially on posterior margin. Epandrium ( Fig. 23 ) setae dark yellow. Cercus ( Fig. 23 ) ending above apex of hypoproct. Hypoproct ( Fig. 23 ) posterior margin slightly emarginate, ending below apex of cercus. Gonocoxite ( Figs. 24–25 ) globular, rounded laterally, posterior margin rounded, setae dark yellow, macrosetae dark reddish brown, setae on inner gonocoxal process yellow. Aedeagus with dorsal apodeme ( Fig. 26 ) anteromedial projection pointed; ventral apodeme ( Fig. 27 ) short, tapered anteriorly, not extending to anterior margin of dorsal apodeme; distiphallus ( Fig. 26 ) broad basally, tapered posteriorly, basiphallus lacking median carina; lateral view ( Fig. 28 ) broadly curved ventrally; ejaculatory apodeme ( Fig. 26 ) anterior half expanded, anterior margin rounded.

Redescription of female.

Similar to male except for following.

Morphometric variation (n=10).

Body length 6.7–9.4, 8.0 mm.

Head. Length 0.86–1.28, 1.05 mm. Frons pruinescence brownish gray, dense with whitish gray pruinescence ventrally; frontal calli dark reddish brown, glossy (absent on MEI 0 90061, 0 90059, present as dark brown circle MEI 090058); setae dark reddish brown, short, over entire frons except callus, not extending lateral to antennal base (extending lateral to antennal base MEI 090059). Antenna yellowish brown, pruinescence white on scape and pedicel with second and third flagellomeres dark brown; antenna/head length 0.57–0.69, 0.63; scape length 0.16–0.24, 0.20 mm, width 0.12–0.16, 0.14 mm, length/width 1.3–2.0, 1.5, scape/pedicel length 1.8–3.0, 2.3, scape/flagellum width 0.6–1.0, 0.8, setae dark reddish brown, elongate; pedicel length 0.07–0.12, 0.09 mm, length/width 0.5–0.8, 0.7, setae dark reddish brown, short; flagellum length 0.30–0.44, 0.37 mm, width 0.14–0.20, 0.17 mm, length/width 1.9–3.1, 2.2, flagellum/scape length 1.7–2.4, 1.8. Maxillary palpus yellow, pruinescence white; length 0.22–0.58, 0.48 mm, length/width 3.1–7.3, 5.5 times longer than wide. Occipital macrosetae dark brown, scattered.

Thorax. Macrosetae 2–3 np, 1–2 sa, 1 pa, 1–2 dc, 2 sc. Mesonotum variegated with lines of gray pruinescence and small areas of brown pruinescence; vittae indistinct; setae dark brown short, suberect intermixed with appressed, white setae laterally. Pleuron with setae whitish yellow. Wing. Brown markings darker and larger with gray area present in cells m 3 and cua 1 (venation with faint brown margin MEI 090059); length 5.2–7.5, 6.3 mm, length/width 2.8–3.3, 3.1; pterostigma brown; cell m 3 open. Legs. Anterodorsal macrosetae 1–3:0–2:0, av 1–3:1–5:5–10, pv 0–9:1–11:0–7.

Abdomen. Cuticle dark reddish brown, pruinescence whitish gray, tergites 1–5 with posterior margin orange brown becoming broader on posterior tergites; dorsal setae dark brown, appressed on dark reddish brown areas of tergites with white, elongate, appressed setae across posterior margin of tergites 1–5; lateral setae dark reddish brown intermixed with white, appressed setae. Terminalia (MEI 090059). Furca ( Fig. 29 ) quadrate, sides parallel; length 0.60 mm, width 0.36 mm; anterolateral projection short.

Immature stages. Larvae have been reared to adults but not described.

Distribution. Notiothereva bezzii is known from Peru ( Fig. 44).

Habitats and Temporal Phenology. Notiothereva bezzii has been hand­netted on coastal dunes in February, March, April, June, July, and November.

Specimens Examined. Type specimen. The lectotype male of Psilocephala bezzii Kröber is labelled " Peru Saman 21.XI " (USNM). Other specimens. PERU. Cartavio, 20.VI.1929, Jaynes, H. A., 1 female MEI 0 90060 (USNM); Chosca, 915 m, 20.II.1928, R. C. Shannon, 1 female MEI 0 90058 (USNM). ANCASH. 40 km S Casma at km 331, 1.III.1981, MEI, 1 male MEI 157828, 1 female 147407 (MEI), coastal desert; 30 km S. Casma at km 31, San Miguel, 1.IV.1981 (larva, adult emerged 23.V.1981, MEI, 1 female MEI 0 90057 (MEI). LAMBAYEQUE. 18.VII.1970, Asmat, R., 1 female MEI 0 90063 (ME I); Chiclago, 12.III.1979, Chicama, F., 2 males MEI 147399, 147403, 1 female 147405 (INHS); sand dunes W. of Lambayeque, 1.VI.1975, MEI, 2 males MEI 090055–6 (MEI); Bodegones dunes near coast, 2.IV.1975, MEI, 4 males MEI 0 90049, 090052–4 (MEI); Lamabayeque [­6.7, ­79.91], 5.III.1981, MEI, 1 female MEI 147408 (MEI); 24.IV.1969, Korytkowski, C., 1 female MEI 0 90062 (EELM); Bodegones [­6.72, ­79.99], 2.IV.1975, MEI, 1 male MEI 0 90052 (USNM), dunes near coast; 2–XI–1979, 1 male MEI 157829, 1 female 147401 (BMNH), coastal dunes; Olmos [­5.979, ­79.748], 6.III.1979, MEI, Chicama, F., 2 males MEI 147402, 157830, 2 females 147404, 147406 (MEI). LIMA. Lurin, 19.I.1966, MEI, 1 female MEI 0 90065 (MEI), coastal dunes; Verrugas Canyon [Quebrada Verrugas] [­11.886, ­76.49], 7.IV.1928, Shannon, R. C., 1 female MEI 0 90059 (USNM).

Figures

FIGURES 16 – 29. Figures 16 – 22. Notiothereva aurea. 16. Tergite 8, epandrium, cerci, hypoproct, dorsal view. 17. Sternite 8, hypandrium, gonocoxite, ventral view. 18. Gonocoxite, hypandrium, dorsal view. 19. Aedeagus, dorsal view. 20. Aedeagus, ventral view. 21. Aedeagus, left lateral view. 22. Female internal reproductive organs. Figures 23 – 29. N. bezzii. 23. Tergite 8, epandrium, cerci, hypoproct, dorsal view. 24. Sternite 8, hypandrium, gonocoxite, ventral view. 25. Gonocoxite, hypandrium, dorsal view. 26. Aedeagus, dorsal view. 27. Aedeagus, ventral view. 28. Aedeagus, left lateral view. 29. Female internal reproductive