Systematics of Phasia Latreille (Diptera: Tachinidae) Author Sun, Xuekui Author Marshall, Stephen A. text Zootaxa 2003 2003-08-29 276 1 1 320 https://biotaxa.org/Zootaxa/article/view/zootaxa.276.1.1 journal article 10.11646/zootaxa.276.1.1 1175­5334 5019510 4177F6E7-B276-438E-8E49-EE5ECD84D351 3.3.2 Phasia bifurca Sun , sp. nov. (Figures I­11, II­6.3) TYPE MATERIAL Holotype ♂ , CHINA , Yunnan , Zhongdian, Daixueshan, Yakou, 4,000m , 15.viii.1981 , X. Zhang (IZAS); allotype ♀ , CHINA , Sichuan , Wolong, 2,200m , 7.ix.1986 , Y. Wang (IZAS); paratypes , 3♂ , same as allotype (IZAS); 1♀ , same as holotype (IZAS). DESCRIPTION Body length: 5­7 mm . MALE: HEAD. Head compressed anteriorly. Eyes separated by a distance larger than or as wide as ocellar triangle. Fronto­orbital plate swollen, black, shining, or grey pruinose (thinly), several rows of hairs laterally (densely, reaching to eyes). Frontal vitta parallel, narrow, black. Frontal vitta at base of antennae 0.25­0.3 times as wide as fronto­orbital plate anteriorly. Ocellar setae present but fine; outer vertical setae present; inner vertical setae present. Face brown to black with grey pruinosity. Parafacial brown to black, without distinct pruinosity; haired; 1.9­2.1 times as wide as first flagellomere. Lower margin of face projecting, visible in profile; orange yellow; shining, without pruinose. Vibrissa not differentiated; intervibrissal distance 1­1.1 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 2/5. Gena black with grey pruinosity; hairs black; height 0.18­0.2 times eye height. Lunule normal; sublunular bulla indistinct. Antenna black, reaching to over half facial height; first flagellomere 1.5­1.6 times as long as pedicel; arista thickened on basal 0.4. Length of oral opening 1.5­1.7 times its width. Occiput flattened, without distinctly pruinose; hairs black. Palpus black. THORAX . Mesoscutum shining, without pruinosity, with fine black hairs. 0+1 acrostichal seta; 0+1(2) dorsocentral setae; 1­3 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; scale­like hair absent. Anepimeral setae medium size; black; 1 katepisternal seta; 4­8 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 white with light brown infuscation. Wing base without scale­like setae. Tegula black. Basicosta black. Wing pictured; white with light brown infuscation, narrow; petiole of apical cell 0.15­0.18 times as long as preceding section of R 4+5 ; M meeting R 4+5 at acute angle. Halter yellow, or brown. LEGS . Fore femur black; hairs black. Fore tibia black, with 1 ad and 2 p , apically with 1 ad , 1 a , 1 v , 1 pv , 1 p , 0­1 pd and 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 ad, 1 v and 2 p , apically with 1 ad , 1 v , 1 pv , 1 p , 1 pd and 1 d . Hind femur black; hairs black; scale­like setae absent. Hind tibia black, with 4­6 ad and 4 pd . ABDOMEN . Abdominal tergites black; pruinosity present, but thin (shining); longitudinal vitta distinctly present (grey). Relative length of abdominal tergites I+II:III:IV:V = 1.1:1:1:1; relative width I+II:III:IV:V = 0.4:1:1:0.6. Hair spots indistinct. TERMINALIA . Syncercus long, deeply V­notched posteriorly. Surstylus spoon­like, slightly longer than cercus. Ejaculatory apodeme small, knob­like. Hypandrium strong, with two strong thorns ventrally; longer than phallus and phallapodeme. Pregonite reduced, apex with sparse hairs. Postgonite well developed, bent ventrally. Phallus short, with fine hairs dorsally. Ventrolateral process short, well sclerotized; dorsolateral process membranous, but slightly arched. FEMALE . Wing hyaline. Eyes separated by a distance as wide as ocellar triangle; not touching. Anterior spine­like setae of hind tibia absent. Sternite VII (sheath) longer than sternite VI; tapered; pointed; bent, apex directed dorsally; sternite VII with linear wrinkles ventrally. Ovipositor bent upward. HOST Unknown. ETYMOLOGY Latin " bifurca " refers to the cerci, which are separated by a deep V­notch posteriorly.