Phasia triangulata Sun, 2003

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320 : 201-203

3.7.7 Phasia triangulata Sun , sp. nov.

(Figures I­64, II­3.1)

TYPE MATERIAL

Holotype ♀, SRI LANKA, Amp. Dist., Ekgal Aru Tank, 100m, 19­23.ii.1977, K. V. Krombein, P.B. Karunaratne, P. Fernando and D.W. Balasooriya (USNM); allotype ♂, INDIA, Saharanpur, 114. vii.1989, ex: Leptocokis augus (?), CIEA 21003 (BMNH); paratype, 1♀, same as allotype (BMNH).

DESCRIPTION

Body length: 6­7.5 mm.

MALE: HEAD. Head spherical or nearly so. Vertex 0.15 times as wide as head width; eyes separated by a distance slightly wider than ocellar triangle. Fronto­orbital plate black with grey pruinosity, 2­3 rows of hairs laterally. Frontal vitta brown to black, almost parallel. Frontal vitta at base of antennae 4.2 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, 0.6 times as wide as first flagellomere. Lower margin of face projecting, visible in profile, brown, grey pruinose. Vibrissa well differentiated; intervibrissal distance 1.6 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 1/4. Gena black with grey pruinosity; hairs black; height 0.12 times eye height. Lunule brown to black, shining; sublunular bulla indistinct. Antenna yellow (dorsal of flagellomere black); first flagellomere 1.8 times as long as pedicel. Length of oral opening 1.3­1.5 times its width. Occiput slightly convex; white pruinose; hairs white. Palpus brown.

THORAX. Mesoscutum black, thinly pruinose, even, with fine black hairs. 0+1 Acrostichal seta; 1+2 dorsocentral setae; 2­3 postpronotal setae; presutural supra­alar seta absent; 1 postsutural intra­alar seta; 2 notopleural setae; 1 supra­alar seta; 2 postalar setae. Pleuron brown, thinly grey pruinose; hairs black. Anepimeral setae medium size, black; 2 katepisternal setae; 8­10 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 (or yellow). Wing base without scale­like setae. Tegula brown. Basicosta yellow. Wing hyaline, narrow; petiole of apical cell 0.3 times as long as preceding section of R 4+5; M meeting R 4+5 almost at right angle. Halter brown. LEGS. Fore femur yellow; one row of d and pv, hairs black. Fore tibia yellow, without bristles, apically with 1 p and 1 d. Fore tarus normal; brown. Fore claws brown, apex black, 0.9 times as long as fifth tarsomere. Pulvilli brown. Mid femur yellow; hairs black. Mid tibia brown, with 1 ad, 1 p and 1 v, apically with 1 ad, 1 a, 1 av, 1 pv, 1 p, 1 v and 1 d. Hind femur yellow; one row of av, pv and ad, hairs black. Hind tibia yellow to brown, with 4 pd and 3 ad.

ABDOMEN. Abdominal tergites yellow or with yellow area; pruinosity absent; longitudinal vitta absent. Relative length of abdominal tergites I+II:III:IV:V = 1.1:1.1:1:1.1; relative width I+II:III:IV:V = 0.5:1:1:0.8. Hair spots indistinct. TERMINALIA. Syncercus without distinct notch posteriorly; apex bent ventrally. Surstylus straight, longer than cercus. Hypandrium shorter than phallapodeme. Ejaculatory apodeme small, knob­like. Pregonite reduced. Postgonite triangular, long, pointed. Phallus long, 1.6 times as long as hypandrium, haired dorsally on basal 1/2. distiphallus swollen, membranous.

FEMALE. Usually smaller than male. Wing hyaline. Anterior spine­like setae of hind tibia absent. Sternite VII (sheath) triangular, narrow apically, not bent, apex straight, smooth ventrally. Ovipositor bent upward.

HOST

Leptocoris augur (Fabricius) ( Hemiptera , Rhopalidae ): New record. India.

ETYMOLOGY

This name is from the Latin " triangulus ", and refers to the triangular sternite VII of female.