A revision of the genera Acrosathe Irwin and Lyneborg, Arenigena Irwin and Lyneborg, and Litolinga Irwin and Lyneborg (Diptera: Therevidae: Therevinae) from the Nearctic Region Author Webb, Donald W. text Zootaxa 2009 2009-05-04 2091 1 1 67 https://biotaxa.org/Zootaxa/article/view/zootaxa.2091.1.1 journal article 10.11646/zootaxa.2091.1.1 1175­5334 5318356 Arenigena floridensis Webb spec. nov. ( Figs. 50 , 72–79 ) Etymology. Ensis (Latin) = a suffix denoting place, locality, or country. This name refers to the State of Florida , USA . Diagnosis . Arenigena floridensis is similar to A. albiseta and A. semitaria in the male having the inner gonocoxal process bilobed ( Fig. 74 ). It differs from A. albiseta in having the gonocoxite ventral view ( Fig. 73 ) lacking a posteromedial aggregation of dense setae; the ventral lobe ( Fig.73 ) with apical setae; the dorsal apodeme ( Fig. 76 ) moderately expanded laterally with the anterior margin emarginate; and the furca ( Fig. 79 ) quadrate with the posterior margin truncate. It differs from A. semitaria in having wing veins and cross-veins yellow, lacking a brown margin; the proepimeron setose across the dorsal margin; the male sternite 8 with setae continuous across posterior margin ( Fig. 73 ); the ventral lobe ( Fig.73 ) with apical setae; the dorsal apodeme ( Fig. 76 ) broadly rounded laterally with the anterior margin emarginate; and the furca ( Fig. 79 ) quadrate with the posterior margin truncate. Description of MALE. Variation (n=9). Body length 7.0–8.4, 8.0 mm. Head . Length 0.94–1.20, 1.08 mm . Ocellar tubercle dark reddish brown, pubescence gray, dense; setae pale white, short. Frons pubescence whitish gray, dense; setae absent. Antenna with scape yellowish brown, pedicel and flagellum dark brown, base and apical third of first flagellomere yellowish brown; antenna/head length 0.57–0.67, 0.63; scape length 0.16–0.22, 0.20 mm , width 0.14–0.20, 0.16 mm , length/width 1.0–1.4, 1.2, scape/pedicel length 2.0–2.8, 2.4, scape/flagellum width 0.8–1.1, 1.0, setae white, short; pedicel length 0.08–0.09, 0.08 mm , width 0.14–0.18, 0.16 mm , length/width 0.4–0.6, 0.5; flagellum (narrow apical portion of first flagellomere short), length 0.34–0.48, 0.41 mm , width 0.16–0.18, 0.18 mm , length/width 1.9–3.0, 2.3, flagellum/scape length 1.6–2.4, 2.1. Parafacial pubescence white. Gena rounded ventrally; setae white, elongate. Maxillary palpus yellow; length 0.34–0.42, 0.38 mm , width 0.06–0.08, 0.06 mm , length/width 5.3–7.3, 6.2; setae white to pale yellow, elongate. Occipital setae white, elongate white, abundant dorsally. Thorax . Macrosetae 2–3 np, 1–2 sa, 1–2 dc. Mesonotum dull brownish gray, pubescence gray, dense; setae white, elongate. Pleuron pubescence gray, dense; setae white, elongate on propleuron, proepimeron (along dorsal margin), anepisternum, katepisternum (setae abundant along anterior margin), laterotergite, metanepisternum, and scutellum. Wing. Membrane pale whitish, veins yellow; length 5.7–7.4, 6.4 mm , width 2.0–2.4, 2.2 mm , length/width 2.6–3.0, 2.9; pterostigma brown. Legs. Coxae pubescence white, dense; setae white, elongate. Femora dark reddish brown, pubescence white; ventral setae white, elongate, dorsal setae white, appressed. Tibiae dark yellowish brown to brown. Tarsi 1 yellowish brown, apex dark brown; 2–5 dark brown. Abdomen. Pubescence white, dense; dorsal setae white, elongate, erect, abundant; lateral setae white, elongate. Terminalia (MEI 128599) brown. Tergite 8 ( Fig. 72 ), setae pale yellow. Sternite 8 ( Fig. 73 ), rectangular, sides rounded, posterior margin truncate; setae pale yellow, continuous across posterior margin. Epandrium ( Fig. 72 ) quadrate; posterolateral margin short, broadly pointed; setae yellow. Cerci ( Fig. 72 ), ending basal to apex of hypoproct. Hypoproct ( Fig. 72 ), posterior margin deeply emarginate. Gonocoxite ventral view ( Fig. 73 ), quadrate, median margin tapering posteriorly to blunt point, setae yellow; lateral view ( Fig. 74 ), oval, tapering posteriorly to blunt point, inner gonocoxal process bilobed, dorsal projection broadly pointed with dark yellow apical setae, ventral projection narrow; ventral lobe ( Fig. 73 ) with short setae apically. Gonostylus lateral view ( Fig. 75 ) thick, cylindrical, broadly curved posterodorsally; setae yellow. Aedeagus with dorsal apodeme ( Fig. 76 ) broad, expanded posterolaterally, anterior margin emarginate; ventral apodeme ( Fig. 77 ), broad, sides parallel, anterior margin truncate; distiphallus dorsal view ( Fig.76 ) broad basally, tapered posteriorly; lateral view ( Fig. 78 ) thick basally, sinuate; aedeagal apodeme ( Figs. 76–77 ) extending beyond anterior margin of dorsal apodeme. FEMALE. Similar to male except for following. Variation (n=3). Body length 8.2–10.2, 9.1 mm . Head . Length 1.00–1.12, 1.04 mm . Frons pubescence whitish gray, dense; setae white, short, appressed, scattered. Antenna/head length 0.70–0.73, 0.71; scape length 0.20–0.24, 0.22 mm , width 0.16–0.20, 0.18 mm , length/width 1.1–1.3, 1.2, scape/pedicel length 2.4–2.5, 2.4, scape/flagellum width 0.9–1.1, 1.0; pedicel length 0.08–0.10, 0.09 mm , width 0.16–0.18, 0.17 mm , length/width 0.5–0.6, 0.5; flagellum length 0.42–0.45, 0.43 mm , width 0.16–0.20, 0.18 mm , length/width 2.3–2.6, 2.4, flagellum/scape length 1.9–2.1, 2.0. Maxillary palpus length 0.38–0.41, 0.40 mm , width 0.06 mm , length/width 6.3–6.8, 6.6. Thorax. Macrosetae 3 np, 1–2 sa, 1–2 dc. Wing. Length 5.8–7.7, 6.6 mm , width 2.2–2.7, 2.4 mm , length/ width 2.6–2.9, 2.7. Abdomen. Dark brown, pubescence whitish gray, dense; dorsal setae white, appressed over entire abdomen. Terminalia (MEI 109201). Furca ( Fig. 79 ), rectangular, anterior and posterior margins truncate; length 0.50 mm , width 0.34 mm ; anterolateral projections short. Immature stages. Eleven males (MEI 128566, 128568, 128574, 128580, 128588, 128597, 128599, 128601–4) and 2 females (MEI 128584–5) have been reared from larvae sieved from gopher tortoise burrows. Distribution. Arenigena floridensis is known from Florida ( Fig. 50 ). Habitats and Phenology. Arenigena floridensis has been reared from larvae sieved from gopher tortoise burrows in Florida . Specimens examined. Type specimens. The holotype male of Arenigena floridensis Webb (MEI 128566) is labeled " FLORIDA : Putnam County, Hollister-Roberts ranch, 12-XII-1984 (larva), Eric G. Milstrey, E.G., gopher tortoise burrow" and is deposited in FSCA. PARATYPES . UNITED STATES . Florida . Putnam County. [Hollister], Hollister-Roberts Ranch [ 29.623 , -81.814 ], 26.III.1985 , Milstrey, E.G., 1♂ MEI 128601 ( FSCA ), sieved gopher tortoise burrow ; 3.IV.1985 , 1♀ MEI 128585 ( INHS ), sieved gopher tortoise burrow ; 18.V.1985 , 1♂ MEI 128604 ( FSCA ), sieved gopher tortoise burrow ; 24.VI.1985 , 1♂ MEI 128580 ( MEIC ), sieved gopher tortoise burrow ; 27.VI.1985 1♂ MEI 128574 ( FSCA ), sieved gopher tortoise burrow ; 26.VIII.1985 , 1♂ MEI 128602 ( FSCA ), sieved gopher tortoise burrow ; 7.XI.1985 1♂ MEI 128571 ( CSCA ), 1♀ 128588 ( USNM ), sieved gopher tortoise burrow ; 16–18.I.1986 , 1♀ MEI 128584 ( FSCA ), sieved gopher tortoise burrow ; 19.I.1986 , 1♂ MEI 128597 ( FSCA ), sieved gopher tortoise burrow ; 23.I.1986 , 1♂ MEI 128568 ( USNM ), sieved gopher tortoise burrow ; 26.I.1986 , 1♂ MEI 128599 ( INHS ), sieved gopher tortoise burrow ; 7.I.1988 1♂ MEI 128603 ( FSCA ), sieved gopher tortoise burrow