Review of the Nearctic genus Wilcoxia James (Diptera: Asilidae: Stenopogoninae) with descriptions of three new species Author Pollock, Darren A. Author Reichert, Lisa A. text Zootaxa 2019 2019-11-12 4695 5 401 437 journal article 24897 10.11646/zootaxa.4695.5.1 34f39440-da4f-4f5e-b9bf-258a7445ce73 1175-5326 3542536 A6844BF7-1B08-40D8-AB38-37F1E93B434C Key to species of Wilcoxia 1 Anterior dorsocentral setae of scutum long and erect (≥ length of scape + pedicel) ( Figs 9–16 ); scutellum with 6–14 long, marginal setae, longer than antenna; mystax composed of long hairs of fairly uniform length and stoutness from oral margin to base of antennae ( Figs 21–25 ); abdominal tergites (except male of W . forbesi , with uniformly pollinose tergites) with alternating pollinose and bare areas, vaguely in “checkerboard” pattern ( Figs 30–33, 35–37 ); legs piceous to black with no contrasting, yellowish areas ( Figs 9–16 )............................................................ martinorum group…2 - Anterior dorsocentral setae of scutum short and appressed (about length of scape) ( Figs 1–8 ); scutellum with 2–6 marginal setae, shorter than antenna; mystax with long hairs or setae confined to lower half or less of face ( Figs 17–20 ); abdominal tergites with pollinose areas covering virtually entire tergite ( W . pollinosa only, Fig. 29 ), or present as bands along lateral and/or anterior and/or posterior margins only, not in a “checkerboard” pattern ( Figs 26–28 ); legs with at least tibiae largely yellow ( Figs 1–8 ).............................................................................. cinerea group…5 2 Sexes similar: abdomen grey pollinose; dorsum of tergite 1 with medial bare patch, and tergites 2–6 with bare patches on medial posterior margin, and anterior lateral bare patches ( Figs 30–33, 36–37 )........................................... 3 - Sexes different: male with abdominal tergite 1 bare medially, remainder densely grey pollinose ( Fig. 34 ); mystax of very dense, long white hairs ( Fig. 23 ); female with abdominal tergites 1–5 with lateral pollinosity, expanded toward midline posteriorly; tergites 2–5 with narrow anterior band of pollinosity ( Fig. 35 )................................ W . forbesi , new species 3 Outer lateral surface of all femora not pollinose (in some specimens, extreme distal end only pollinose); usually 2 postalar setae present; in most specimens, pair of short, linear non-pollinose patches present on scutum, between central stripe of scutum and postalar callosities ( Fig. 41 ); knob of halter distinctly pinkish, contrasting yellow stem............ W . apache , new species - Outer lateral surface of fore femur (in most specimens mid and hind femora also) pollinose; usually 1 postalar seta present; scutum without distinct, non-pollinose areas, or if slightly suggested, then not posterior of scutum midlength; knob of halter yellow, in some specimens with very slight pink tinge, not contrasting yellow stem................................. 4 4 Outer lateral surface of all femora largely pollinose; first abdominal tergite non-pollinose medially, with anterior edge of bare area wider than posterior margin; second abdominal tergite with medial bare area in most specimens isolated from lateral nonpollinose bare areas ( Figs 36–37 ); wings hyaline, without yellow cast........................... W . martinorum Wilcox - Pollinosity of mid and hind femora confined to distal 1/4 or less (fore femur with more extensive coverage in some specimens); first abdominal tergite as above, but with posterior edge of bare patch wider than anterior edge; second abdominal tergite medial bare area (usually) contiguous with lateral bare areas ( Figs 32–33 ); wings hyaline, with slightly yellow cast........................................................................................... .. W . flavipennis , new species 5 Scutellum uniformly pollinose (e.g., Fig. 41 ); scutum with 2–3 pairs of small, semicircular non-pollinose patches or contrasting pollinose patches; scutellum with 2–3 posterior marginal setae................................................. 6 - Posterior margin of scutellum non-pollinose (e.g., Fig. 42 ); scutum uniformly pollinose, without 2–3 pairs of small, semicircular non-pollinose or contrasting pollinose patches; scutellum with 4–6 posterior marginal setae........................ 7 6 Abdominal segments 1–6 in female, 1–7 in male, with dense yellowish-grey pollinosity; several tergites with thinly pollinose or bare elliptical spots laterally and medially ( Figs 7–8 , 29 ); abdomen long and narrow (especially in male), segment 2 longer than wide; TL 9–11 mm ................................................................. W . pollinosa Wilcox - Abdominal segments 1–6 in female, 1–7 in male, mostly non-pollinose with narrow lateral margin of grey pollinosity, expanded toward center posteriorly, and grey pollinosity on anterior margins of tergites 2–5 ( Figs 5–6 , 28 ); abdomen relatively shorter and wider, segment 2 wider than long; TL 4–8 mm ............................................. W . painteri Wilcox 7 Ratio of width of face: width of eye ≤ 0.7; femur with extensive piceous area, in females occupying> 1/2 length of femur, in males almost entire femur dark; tibiae with slight distal infuscation in female, in male distal 1/3 to 1/2 of tibiae infuscate, especially so on fore and middle legs ( Figs 1–2 ); wings light brown, almost hyaline in female............... W . cinerea James - Ratio of width of face: width of eye ≥ 0.8; femur with base and distal ~1/3 yellow-orange, with piceous region between; tibiae entirely yellow-orange, in some specimens slightly infuscated distally, especially on front legs ( Figs 3–4 ); wings medium brown, lighter in female................................................................... W . monae Wilcox