Phasia truncata Herting, 1983

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320 : 153-155

3.5.14 Phasia truncata Herting, 1983

(Figures I­65, II­4.2)

Phasia (Hyalomyia) truncata Herting, 1983: 7, 1984: 170 (catalog) ­ Herting and Dely­Draskovits 1993: 413 ­ Ziegler 1994: 160 (review).

DESCRIPTION

Body length: 3­5 mm.

MALE: HEAD. Head spherical or nearly so. Eyes separated by a distance as wide as ocellar triangle. Fronto­orbital plate black with grey pruinosity. Frontal vitta black with grey pruinosity. Frontal vitta at base of antennae 1.8­2.0 times as wide as fronto­orbital plate anteriorly. Ocellar setae present but fine; outer vertical setae present; inner vertical setae absent. Face black with grey pruinosity. Parafacial black with grey pruinosity, bare, as wide as first flagellomere. Lower margin of face projecting, visible in profile, brown to black with grey pruinosity. Vibrissa well differentiated; intervibrissal distance 1.5 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 1/4. Gena black with grey pruinosity; hairs white, or black; height 0.1 times eye height. Lunule black and shining; sublunular bulla indistinct. Antenna black; first flagellomere 1.5­1.6 times as long as pedicel; arista thickened on basal 0.3. Length of oral opening 2.1­2.2 times its width. Occiput flattened, white pruinose; hairs black. Palpus black.

THORAX. Mesoscutum shining, without pruinosity, with fine black hairs. 0+1 acrostichal seta; 0(1)+1 dorsocentral setae; 1­2 postpronotal setae; presutural supra­alar seta present, but fine; 1 postsutural intra­alar seta; 2 notopleural setae; 1 supra­alar seta; 2 postalar setae. Pleuron thinly grey pruinose; hairs black; and without scale­like setae. Anepimeral setae medium size, black; 1 katepisternal seta; 7­9 meral setae. Scutellum black, shining, without pruinosity, with two pairs of marginal setae; apical setae present and distinct; discal setae randomly arranged, not in rows. Subscutellum not very prominent.

WING. Lower calypter hyaline white. Wing base without scale­like setae. Tegula black. Basicosta black. Wing hyaline, narrow; petiole of apical cell 0.45 times as long as preceding section of R 4+5; M meeting R 4+5 almost at right angle. Halter yellow. LEGS. Fore femur black; hairs black. Fore tibia black, without bristles, apically with 1 d. Fore tarus black. Fore claws black, 0.9­1 times as long as fifth tarsomere. Pulvilli black. Mid femur black; hairs black. Mid tibia black, with 1 v, apically with 1 a, 1 av, 1 pv, 1 v and 1 d. Hind femur black; hairs black. Hind tibia black, slightly arched, with 1 a, one row of ad and pd.

ABDOMEN. Abdominal tergites black; longitudinal vitta distinctly present. Relative length of abdominal tergites I+II:III:IV:V = 1.3:1:1:1; relative width I+II:III:IV:V = 0.4:1:1:0.7. Syntergite I+II shiny, not pruinose. Pruinosity of tergites III, IV and V silvery; hair spots distinct. TERMINALIA. Syncercus broad, U­notched posteriorly. surstylus flattened, longer than cercus; broadened on apical half, arched dorsally. Ejaculatory apodeme small, knob­like. Hypandrium as long as phallapodeme. Pregonite even, with two small teeth posterioventrally. Postgonite triangular, pointed, bent ventrally. Phallus as long as or shorter than hypandrium, not haired dorsally. Distiphallus broad, membranous.

FEMALE. Wing hyaline. Eyes almost touching. Femora swollen. Anterior spine­like setae of hind tibia absent. Sternite VII (sheath) shorter than sternite VI, broad apically, slightly bent, apex directed dorsally, rectangular in lateral view, sternite VII with linear wrinkles ventrally. Ovipositor bent upward.

TYPE MATERIAL

Phasia (Hyalomyia) truncata Herting, 1983 . Holotype ♀, SPAIN, Huelva, Las Marismas, El Rosio, 3m, 22.vii.1979, W. Schacht (SMNS, not examined); paratype 1♀, same as holotype (DEBU, Tschorsnig's per. comm., treated as paratype).

OTHER MATERIAL EXAMINED

PORTUGAL: Marinha Grande, Estremadura, vi.1966. N.L.H. Krauss (1♀, USNM). SPAIN: Estaotit, 16.vi.1966, C.N. Cokicr (1♀, BMNH). Huelva El Rocio, 10m, 13.vii.1975, W. Schacht (3♀, BMNH); Huelva, Mazagón, 30. Mal. 1983, Tschorsnig (1♂ 1♀, DEBU); Santiago, de Compostela, Coruna ix.1966. N.L.H. Krauss (1♀, USNM).

HOST

Unknown.

NOTES

Phasia truncata was originally described from female specimens only.