Phasia nigrens ( Wulp, 1892 ), Sun & Marshall, 2003

Sun, Xuekui & Marshall, Stephen A., 2003, Systematics of Phasia Latreille (Diptera: Tachinidae), Zootaxa 276 (1), pp. 1-320: 91-92

publication ID 10.11646/zootaxa.276.1.1

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Phasia nigrens ( Wulp, 1892 )

comb. nov.

3.4.12 Phasia nigrens ( Wulp, 1892)   , comb. nov.

(Figures I­40, II­9.3)

Hyalomya nigrens Wulp, 1892: 185   .

Alophorella nigrens   : ­ Guimarães 1971: 11 (catalog).

Allophora polita Brooks, 1945: 669   (in part, misidentification).


Body length: 6­8 mm.

ALE: HEAD. Head spherical or nearly so. Eyes separated by a distance as wide as ocellar triangle. Fronto­orbital plate black with grey pruinosity; more than 3­4 rows of hairs laterally. Frontal vitta black. Frontal vitta at base of antennae 0.8­0.9 times as wide as fronto­orbital plate anteriorly. Ocellar setae present but fine; outer vertical setae present but fine; inner vertical setae absent. Face black with grey pruinosity. Parafacial black with grey pruinosity, bare, 1.1­1.2 times as wide as first flagellomere. Lower margin of face projecting, visible in profile; brown to black with grey pruinosity. Vibrissa well differentiated; intervibrissal distance 0.9­1.0 times distance between vibrissa and eye on same side; facial ridge with bristles on lower 1/3. Gena black with grey pruinosity; hairs white; height 0.15­0.18 times eye height. Lunule black and shining; sublunular bulla indistinct. Antenna black; first flagellomere 1.0­1.1 times as long as pedicel; arista thickened on basal 0.32­ 0.38. Length of oral opening 2.2­2.4 times its width. Occiput flattened, white pruinose; hairs black. Palpus yellow (black ventrally).

THORAX. Mesoscutum thinly pruinose; presutural area sometimes with 3­5 black slender spots posteriorly, with fine black hairs. 0+1 acrostichal seta; 0(1)+1 dorsocentral seta; 1­2 postpronotal setae; presutural supra­alar seta present, strong; 1 postsutural intraalar seta; 2 notopleural setae; 1 supra­alar seta; 2 postalar setae. Pleuron thinly grey pruinose; hairs black; scale­like hair absent. Anepimeral setae hair­like, black; 1 katepisternal seta; 8­11 meral setae. Scutellum black with grey pruinosity (thinly), with two pairs of marginal setae; apical setae present and distinct; discal setae arranged in 4­5 rows. Subscutellum not very prominent. WING. Lower calypter white with light brown infuscation. Wing base without scale­like setae. Tegula black. Basicosta black. Wing pictured; only limited on basal 1/2; broad; petiole of apical cell 0.28­0.30 times as long as preceding section of R 4+5; M meeting R 4+5 almost at right angle. Halter yellow or brown. LEGS. Fore femur black; ventrally and laterally with whitish yellow hairs, dorsally with black hairs. Fore tibia brown to black, without bristles, apically with 1 p and 1 d. Fore tarus black. Fore claws black; 1.0­1.1 times as long as fifth tarsomere. Pulvilli black. Mid femur black; ventrally and laterally with whitish yellow hairs, dorsally with black hairs. Mid tibia brown to black, 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 black; ventrally and laterally with whitish yellow hairs, dorsally with black hairs; scalelike setae absent. Hind tibia brown to black, with one row of ad and pd.

ABDOMEN. Abdominal tergites purple black, shiny; pruinosity absent; longitudinal vitta absent. Relative length of abdominal tergites I+II:III:IV: V = 1.3:1:1:1.2; relative width I+II:III:IV: V = 0.4:1:1:0.8. Syntergite I+II and tergites III, IV shining, not pruinose. Pruinosity of tergite V absent, or present (yellow); hair spots indistinct. TERMINALIA. Syncercus broad triangular, posterior notch absent or very small. Surstylus slender, downward, longer than cercus. Ejaculatory apodeme small, knob­like. Phallapodeme longer than hypandrium, but almost as long as phallus. Epiphallus well developed. Pregonite triangular, pointed. Postgonite pointed, as long as pregonite. Phallus short, densely haired dorsally. Distiphallus well sclerotized, distally expanded into short, broad bilobed sclerite, with a pointed apex.

FEMALE. Wing hyaline. Eyes separated by a distance as wide as ocellar triangle; not touching. Hind tibia with 1­2 rows of anterior spine­like setae. Syntergite I+II shiny, tergites III, IV, V grey or yellow pruinose. Sternite VII (sheath) longer than sternite VI, tubular like, broad apically, slightly bent, apex directed ventrally; sternite VII with linear wrinkles ventrally. Ovipositor straight, apex slightly downward.


Syntypes, 3♀, MEXICO, Guerrero, Xucumanatlan, 7,000ft, H.H. Smith (BMNH, 1♀ abdomen missing, examined).


USA. New Mexico: White Mts, 8.30, 8,200ft, Townsend (1♂, USNM, paratype of Allophora polita Brooks   ). Texas: Big Bend N.P., Green Gulch, Pine Can., Panther Junction and Boquillas, 5,000 ­6,000 ft, 1­23, v.1959, J.F. McAlpine and W.R.M. Mason (14♂ 6♀, CNCI); Kerrville, 2.iv.1959, J.F. McAlpine (1♂, CNCI). MEXICO. Chihuahua (30mi NW), 5,000ft, Majalca Road, 17.iv.1961, Howden and Martin (1♀, CNCI); El Salto (10­11mi W and 26mi E), Durango, 8,000 ­9,000 ft,­12.vii.1964, J.F. McAlpine and L.A. Kelton (2♂ 7♀, CNCI); Durango (11mi W), Durango, 7,000ft,, J.F. McAlpine (1♀, CNCI); Sinaloa, El Palmito (4.5mi W), 6,300ft, 20.vii.1964, J.F. McAlpine (1♀, CNCI).




Royal British Columbia Museum - Herbarium














Phasia nigrens ( Wulp, 1892 )

Sun, Xuekui & Marshall, Stephen A. 2003

Alophorella nigrens

Guimaraes, J. H. 1971: 11

Allophora polita

Brooks, A. R. 1945: 669

Hyalomya nigrens

Wulp, F. M. 1892: 185