Apocephalus bilineatus, Brown, Brian V., 2014

Brown, Brian V., 2014, Revision of the Apocephalus analis group of ant-decapitating flies (Diptera: Phoridae), Zootaxa 3857 (4), pp. 551-570 : 556

Apocephalus bilineatus new species

( Figs. 4 , 5, 7, 10 )

Diagnosis. Hind tibia with two longitudinal setal palisades ( Fig. 4 ).

Description. Body length 1.2–1.8 mm. Frons 0.50 head width. Flagellomere 1 round or rounded oval, yellow or light brown. Pleuron whitish yellow. Hind tibia with two longitudinal setal palisades. Costa 0.51 wing length. Halter brown. Abdominal tergites yellow anteriomedially and brown posterolaterally, normal sized. Tergite 6 light brown, about as broad as tergite 5, entire, apical margin straight, with large thick setae posterolaterally. Venter of abdomen whitish yellow, venter of segments 3–5 with scattered thin setae, venter of intersegment 6–7 with rounded, thinly sclerotized plate producing vertical surface in posterior view, with posterior dense comblike row of setae. Venter of segment 6 with large brown sclerite extending to dorsal margin, with dense, short setae. Oviscape elongate oval, anterior process short, broadly rounded, large lateral setae absent. Dorsum of oviscape with long thin setae dorsolaterally to laterally from midlength to near apex. Apex broadly truncate, downturned, lacking dorsoapical setae. Venter of oviscape with large ventrolateral seta on each side. Intersegment 7–8 without sclerotization. Anterior arms of stylet broad, similar to A. analis ( Fig. 50 ).

Distribution. Nicaragua south to Colombia.

Derivation of specific epithet. Named for the two longitudinal setal palisades on the hind tibia.

Holotype. ♀, COLOMBIA: Magdalena: PNN Tayrona, Zaino , 11.33°N, 74.03°W, 50m, 28.vi–17.vii.2000 ,, R.Henriquez, CAP-301, Malaise trap (IAVH) [LACM ENT 073247].

Paratypes. COLOMBIA: Magdalena: PNN Tayrona, 11.27°N, 74.22°W, 30m, 1♀ 13–30.v.2000, R.Henriquez, CAP-134 Malaise trap #1 (LACM), PNN Tayrona, Cañaveral , 11.33°N, 74.03°W, 50m, 1♀ 15.xii–2.i.2001, R.Henriques, CAP-963, Malaise trap (LACM), 1♀ 2–22.i.2001, R.Henriques, CAP-1207, Malaise trap (LACM), 2♀ 26.iv–12.v.2000, R.Henriques, CAP-131, Malaise trap (LACM), PNN Tayrona, Pueblito , 11.33°N, 74.03°W, 225m, 2♀ 14–29.vii.2000, R.Henriquez, CAP-298, Malaise trap (LACM). COSTA RICA: Limon: Pacuarito, 10.11°N, 83.46°W, 300m, 1♀ 24–26.viii.1996, Gustafsson et al., Malaise trap (LACM). NICARAGUA: Rio San Juan: Refugio Bartola, 16km ESE El Castillo, 10.98°N, 84.34°W, 1♀ 22.iv–10.v.1999, L.LaPierre, Malaise trap (LACM). PANAMA: Canal Zone: Gamboa, Pipeline Road, 1♀ vii.1967, W.W.Wirth, Malaise trap (USNM).

Figures

FIGURES 1 – 4. Apocephalus analis group. 1 – 2. Lateral habitus. 3. Frons, anterior, image digitally manipulated to enhance symmetry. 4. Hind leg, anterior. Abbreviations: dsa—dorsal supra-antennal setae; flg 1 — flagellomere 1; plp—palpus; vif—ventral interfrontal setae; vsa—ventral supra-antennal setae.

FIGURES 9 – 16. Female abdomens. 9 – 12. Ventral. 13 – 16. Posterior.

FIGURES 43 – 51. Stylets, dorsal.