Cydistomyia alternata (Ferguson & Hill)

Mackerras, I. M., Spratt, D. M. & Yeates, D. K., 2008, Revision of the horse fly genera Lissimas and Cydistomyia (Diptera: Tabanidae: Diachlorini) of Australia, Zootaxa 1886 (1), pp. 1-80 : 53-54

publication ID	https://doi.org/ 10.11646/zootaxa.1886.1.1
persistent identifier	https://treatment.plazi.org/id/D95287EC-2406-FF93-FF73-F95A95D8FBA0
treatment provided by	Felipe
scientific name	Cydistomyia alternata (Ferguson & Hill)
status

Treatment

Cydistomyia alternata (Ferguson & Hill) View in CoL

( Figs. 6 View FIGURES 1–8 , 38 View FIGURES 37–39. 37 )

Tabanus limbatinevris Macquart, 1850: 29 View in CoL [Preoccupied by Macquart, 1847], Nearctic; Froggatt 1911: 15, 1915: 15; Surcouf 1921: 73; Mackerras 1959: 167 (syn. of alternatus Ferguson & Hill ). Holotype female, from east coast of New Holland, stated to be in MNHN.

Tabanus macquarti Ricardo, 1915 a: 277 View in CoL (replacement name for limbatinevris Macquart, 1850 View in CoL ) [Preoccupied by Schiner, 1868, Neotropical]; Froggatt 1915: 17; Ricardo 1917: 219; Taylor 1918: 65, 1919: 57; Ferguson & Henry 1920: 842;

Ferguson 1920: 132, 1921a: 373; Surcouf 1921: 73 (notes nom. preocc.).

Tabanus alternatus Ferguson & Hill, 1922: 258 (replacement name for macquarti View in CoL ) Ricardo, 1915); Hardy 1939: 42, 1944: 83.

Cydistomyia alternata View in CoL ; Mackerras 1959: 167; Daniels, 1989: 286; Bickel & Elliot, 1998 -2005: 2.

Other material examined. 191 ♀, 7 ♂ ..

Diagnosis. A medium to large dark blackish species similar to C. doddi and C. magnetica . Distinguished from former by wider frons and callus (particularly at their bases), more brown colouration of abdomen and only slight forward projection of dorsal tooth on basal plate of antennal flagellum. To be distinguished from C magnetica by less uniform brown clouding on wings which is restricted essentially to brown suffusion along wing veins, less oblong callus with broader more tapering extension and slight forward projection of dorsal tooth on basal plate. Length 13–17 mm.

Female. Head. Eyes (relaxed) blackish, bare (short sparse hairs visible at 35X magnification). Frons narrow, parallel or slightly divergent, index 4.5–5.7, with dull fawn-brown tomentum and short black hairs; vertex not hollow; vertical triangle greyish, with long black hairs; ocellar tubercle well defined, raised, brown, slightly shiny, ocelli not visible; callus raised, elongate, tapering, shiny, black, less than width of frons at base, extension reaching upper third of frons. Subcallus smooth, with yellowish fawn tomentum, without hairs; parafacials and face with fawnish grey tomentum, short dull yellowish hairs mixed with black and white ones; beard dull yellowish. Antennal scape with greyish tomentum, long black hairs, moderately developed dorsal prolongation; pedicel blackish brown, with black hairs and well-developed dorsal prolongation; basal plate brownish black, with conspicuous dorsal angle forming short tooth which tends to project forward slightly; style slender, black, about same length as basal plate. Palpi with ashy tomentum and greyish white hairs on basal half of segment 2, grey speckled tomentum and short predominantly dull yellowish and black hairs on distal half, mixed black and greyish white hairs on palpal segment 1. Labella with inconspicuous lateral chitinised bar, much less definite than in C. doddi .

Thorax. Scutum and scutellum greyish brown, with traces of darker median and dorsocentral lines, lighter brownish grey on lateral margins, with short black and scanty appressed yellowish hairs; marginal hairs black in front of wing root, mixed black and white to yellowish behind it. Pleura pale grey, with yellowish hairs.

Legs. Femora and tarsi black, with black hairs; tibiae brown on basal half, with predominantly black hairs, some yellow hairs on basal half of hind tibiae.

Wings. Distinctly suffused with light greyish brown, costal cell entirely brown; irregular dark brown suffusion along radial and median veins from three quarters the length of R 2+3, around the discal cell, and along CuA l and sometimes CuA 2. (The wing markings are closer to those of doddi than to magnetica ).

Abdomen. Blackish brown, darkening in median third on 2nd and 3rd tergites and extensively on remain- der; narrow pale apical margins on tergites, broadening to form pale median triangles on tergites 1–4, yellowgolden hairs on median and lateral triangles and on 1–5 (not as conspicuous as in magnetica ) and forming pale lateral triangles and on pale apical band on fourth tergite, elsewhere hairs black. Venter brown with conspicuous pale apical margins on sternites 2–7, yellow-golden hairs over pale bands on sternites 2–4, mixed yellowgolden and black elsewhere.

Male. Similar to female but with more yellow-golden hairs on face, parafacials, beard, pleura and femora, and with much paler abdominal venter. Eyes bare (scattered short hairs visible at 35X magnification), (relaxed) green, meeting in mid line, upper facets not appreciably enlarged nor differentiated from lower ones. Ocellar tubercle well developed, oval, blackish brown, without hairs, projecting only slightly above level of eyes. Palpi fawn-brown, elongate, conical, with bluntly rounded tip, with long white hairs basally and shorter black hairs mixed with white ones apically.

Distribution. Central coastal QLD to S of Port Macquarie NSW. QLD: Bowen, Nov., S. Misko; Broken R., 80 km W of Mackay, Nov., E Britton and S. Misko; Eungella W of Mackay, Jan., M.S. & B.J. Moulds; Byfield, Jan., I.F.B. Common, Apr., T.G. Campbell; Blackall Ra., Jan., C. Borch; Eidsvold, Jan., M.J. Mackerras; Tin Can Bay, Jan., H.A. Standfast, July; Cooran, May, Davis; Brown's Ck, Eumundi, Jan.; Boreen Point, Apr., E.N. Marks; Upper Noosa R., Nov., A.L. Dyce; Wappa Falls, Yandina, Mar., H.A. Standfast; Didillibah, nr Nambour, Mar., T.G. Campbell; Woombye, Oct., Dec., D.H. Colless; Montville, Mar.; Mountain Ck, Buderim, biting, Oct., E.N. Marks; Mooloolabah, Dec, K.R. Norris, Apr., biting, E.N. Marks; Glass House Mountains, Dec., I.M. Mackerras; Woodford, Nov.; Caloundra, Oct., Wild; Landsborough, Jan., E.N. Marks, Mar.– Apr., H.A. Standfast; Peachester, Dec., M. Colbo; Bribie Is., Apr., I.M. Mackerras; Woorim, Bribie Is., biting, Feb., E.N. marks; Saltwater Ck, Brisbane, Mar., H.A. Standfast; Sunnybank, Dec., L. Pottinger; Pimpama, Dec.–Jan., K.R. Norris; Jumpin Pin, Mar., B. Kay; Southport, Feb., D.M. Spratt; Mt Tamborine, Nov., J.W. Davidson; Canungra, May, Sharp, biting, H.A. Standfast; “Glen Witheren”, nr Canungra, Dec., Jan., G.B. Monteith; Surprise Rock, Binna Burra, Nov., biting, Nov., I.M. and M.J. Mackerras; Bruce Highway, Oct., C.F. Ashby; Springbrook, Dec., D.C. Lack; Lamington Nat. Pk., Nov., F.A. Perkins, Feb., I.C. Yeo, H.G. Greening. NSW: Tweed Heads, Nov., Rohigras; Brunswick Heads, Jan., K.R. Norris, Feb., D.E. Havenstein; Richmond R., Feb., Dec., D.K. Yeates; Byron Bay, Dec., Marr; Byron Bay lighthouse, Feb., R. Sheridan; Bangalow, Nov., Marr; Tregeagle, 10 km SE of Lismore, Dec., D.K. Yeates; North Ballina, Nov.–Jan.; East Ballina, Feb., C.E. Chadwick; Coraki, Nov., I.F.B. Common; Kilgin, Richmond R., Dec.; Bundjalung Nat. Pk. nr Evans Head, Jan., C.L. Lambkin; Summit Mountain, Gibraltar Ra. Nat. Pk., Nov., D.K. Yeates; Grafton, Apr., M.E. Fuller; Kangaroo River SF, Dec., S. Evans and J. Wright; Wild Cattle Creek SF, Dec., S. Evans and J. Wright; Bellbird SF, nr Mt Lindsay, Nov., G. Daniels and Schneider; Coffs Harbour, Oct., Feb., T.G. Campbell; Boambee, Feb., T.G. Campbell; Ebor, Jan., M.E. Fuller; 15 km SW of Ebor; Broadwater, Nov., Baber, Mar.; Nambucca Heads, Dec.-Jan., H. Grey, Jan., J.B. Cleland; Scott's Head, nr Worrell Ck, Feb., D.H. Colless; Macleay R., Jan.; Yarrahapinnie, nr Kempsey, Mar., T.G. Campbell; Port Macquarie, Jan., M.F. Day, Feb.; Kendall, Jan.–Feb., Harrington, Mar., T.G. Campbell; The Pinnacle, Wiangaree SF, Dec., C. Hagan; Kundibakh, C. Dennes.

Kingdom	Animalia
Phylum	Arthropoda
Class	Insecta
Order	Diptera
Family	Tabanidae
Genus	Cydistomyia