Sarcophaga (Bulbostyla) yorkii Parker

Giroux, Marjolaine & Wheeler, Terry A., 2010, Systematics of Bulbostyla, a new subgenus of Sarcophaga Meigen, and change of status for Robackina Lopes (Diptera: Sarcophagidae), Zootaxa 2553, pp. 35-59 : 49-51

Sarcophaga (Bulbostyla) yorkii Parker

( Figs. 52–58 )

Sarcophaga yorkii Parker 1919: 265 .

Sarcophaga (Neobellieria) yorkii: Pape (1996: 367) .

Type material: holotype ɗ labelled ‘Niagara Falls / June 25 NY’; ‘PARKER COLL. / SARCOPHAGIDAE / purchased Dec. 1937 / David G. Hall.’; ‘ Sarcophaga / yorkii R. PKc. / Holotype’ ( USNM). Paratype: same data as holotype (1ɗ, USNM).

Other material examined: Canada: Québec: summit of Mt. Rigaud, Vaudreuil Co., 23.vi.93 (2ɗ, DEBU); same data except 19.v.2004 (1ɗ, CNC); same data except 8.vi.2004 (1ɗ, CNC); same data except 9.v.2006 (1ɗ, CNC); USA: Georgia: Blood Mt., 20.vi.52 (1ɗ, FSCA); North Carolina: Burke Co., Pisgah Nat. Forest, summit of Hawksbill Mt., 27.v. 1999, 4020 ft (9ɗ, GD).

Description (male): body length 9.5–13.0 mm.

Head: 11–17 pairs of medioclinate frontal setae. Frontal vitta usually matt black. Genal setae black, postgena mostly black-haired, white setae restricted to posterior part of postgena.

Thorax: proanepisternum setose.

Wing: dark hairs on lateral margin of alula as long as those on anterior margin of anal lobe. Hairs fringing calypters dark brown or black.

Legs: hind tibia without long, wavy posteroventral hairs.

Abdomen: tergite 5 with orange-yellow margin on apical half or third, sometimes entirely yellow, row of strong setae forming half circle spreading on apical third.

Terminalia: cerci and syntergosternite 7+8 darker than epandrium. Surstylus with a small posteroventral projection ( Figs. 55–56 ). Window on sternite 5 almost even with rest of base. Pregonite with or without pointed lateral extension. Vesica and juxta as in Figs. 52–53 . Juxta in posterior view as in Fig. 54 .

Female: body length 10.0 mm.

Terminalia: tergite 6 with moderately strong setae on each side evenly spaced and about equal in size, with long hairs interspersed. Tergite 7 and 8 absent. Sternite 6 and 7 covered with short to moderately long setae and hairs on posterior margin. Posterior margin of sternite 7 curved and slightly concave in the middle ( Fig. 58 ).

Remarks: The genitalia are missing from the paratype specimen but sternite 5 is still present.

Figures

FIGURES 52 – 58. Sarcophaga (Bulbostyla) yorkii. 52. Phallus and hypandrial complex, left lateral. 53. Acrophallus, anterior. 54. Acrophallus, posterior. 55. Epandrium, surstylus and cerci, lateral. 56. Epandrium, surstylus and cerci, posterior. 57. Male sternite 5, ventral. 58. Female terminalia, posteroventral. Scale bar = 0.2 mm (Figs. 52 – 54), 0.5 mm (Figs. 55 – 58).