Megaselia luteicauda (Borgmeier 1925)

Megaselia (Aphiochaeta) luteicauda (Borgmeier)

Aphiochaeta luteicauda Borgmeier, 1925b, p. 145 [♀; Petrópolis].

Megaselia (Aphiochaeta) luteicauda (Borgmeier).—Borgmeier, 1962b, p. 301 [in key].

Lectotype female (CTB) and one paratype female (CTB), from Petrópolis, R. J.; Borgmeier and Ronchi, collectors.

MALE (undescribed) .—Length 1.6–2.0 mm. Frons about as broad as long medially, black to blackish brown, subshining, scarcely pubescent, with a fine median line. Su subequal, the lower somewhat shorter (5:4 or 6:5), the upper about one-third of frontal width apart, the lower one-sixth. Antials on level of lower su, near anterior corner of frons, a little removed from eye-margin; anterolaterals slightly above level of upper su, near eye-margin. Second row slightly convex, the bristles equidistant. One strong lower postocular bristle; jowls-cheeks with an ascending row of 8 moderate bristles. Third antennal joint globose, brown; arista long, distinctly pubescent. Palpi flattened, yellowish, with 5 long bristles. Proboscis short, disk-shaped, circular when seen from below.

Thorax dark castaneous, subshining, Pubescence short. Mesopleura with a few fine hairs above and 1–3 bristly hairs behind. Scutellum with 4 long bristles.

Abdomen opaque, black, grayish pollinose; 2nd tergite elongated, 3–6 subequal, sparsely pubescent, some bristly hairs laterally and on hind margin of 6th. Hypopygium (Figure 20) small, black brown, at left with a row of 5 bristly hairs near lower margin. Anal segment long (0.2 mm), yellow, with short hairs, apical hairs not differentiated.

Lews yellowish brown to castaneous. Foretibia with a dorsal row of black spinuli. Foretarsus slender, metatarsus about as long as 2–4. Midtibial setulae biseriate on basal half, hair-seam reaching apical sixth. Hind femur broad, ventral hairs on basal half short, delicate, Posterodorsal setulae on hind tibiae strong below middle, weaker above.

Wing (Figure 19, ♂ from Dominica) yellowish brown, veins brown. Costa 0.56 of wing length, ratio of segments 14: 14:3. Cilia long (0.13 mm), there are 6 pairs between r1 and r3. Mediastinalis obsolete. Third vein with a bristle at base. Fork not large, acute; 4th vein starting at fork with a very faint hook (sometimes missing), curved near base, nearly straight at middle; veins 5–6 sinuous. Axillary margin with 3 hairs. Halteres yellow, peduncle reddish brown.

FEMALE.—Length 2.0–3.5 mm. Upper su sometimes more than one-third of frontal width apart, antials sometimes nearly vertically below anterolaterals. Third antennal joint small. Proboscis short, narrow. Abdomen (Figure 18) opaque, black on segments 1–3, venter enclosed, the rest yellow or orange, 1st tergite short; 2nd and 3rd large trapezoid, form a little variable, with short sparse pubescence, marginal hairs on 2nd (sometimes also on 3rd) stiff, bristle-like. Segments 3–10 membranous, retractile, often nearly entirely withdrawn under 3rd tergite; 3–6 indistinctly segmented, practically bare, 5th very short, 7–10 abbreviated. Cerci indistinct. Costa 0.55–0.57 of wing length, segments 1 and 2 subequal, 1st sometimes a little longer (23:20), there are 7–8 pairs of cilia between r1 and r3.

MATERIAL EXAMINED.—Besides the types from Petrópolis, Rio de Janeiro, I have seen both sexes from Nova Teutonia, Brazil (Plaumann) and Costa Rica (Higuito, San Mateo; Suiza de Turrialba; P. Schild leg.); numerous females from Curitiba, (Wiltuschnig, XII. 1925); one female from Loreto, Misiones, Argentina (Ogloblin 11.X36), on dead opilionid. From Dominica I have seen 12 males and 8 females from the following localities (Wirth I.–III, 1965): d’Leau Gommier, Manets Gutter, Sylvania, Layou R. mouth, Pont Casse, Fond Figures R. and Clarke Hall.

Megaselia luteicauda adolah lalek dari famili Phoridae. Spesies ko juo marupokan bagian dari ordo Diptera, kelas Insecta, filum Arthropoda, dan kingdom Animalia.

Lalek ko biasonyo panjangnyo sekitar 0,5–6 mm (1⁄64–1⁄4 in).