(Figs. 291 and 292)

Picobia locustella Skoracki et al., 2004: 164, figs. 23–27.

Type host: Locustella naevia (Boddaert) (Passeriformes: Sylviidae). Type locality: Poland.

NON-PHYSOGASTRIC FEMALE (holotype and 1 paratype). Total body length 540–570. Gnathosoma. Hypostomal apex tapering. Infracapitulum apunctate. Each medial branch of peritremes with 3–4 chambers, each lateral branch short with poorly visible chambers. Movable cheliceral digit edentate in posterior part. Stylophore 110–115 long. Idiosoma. Propodonotal shield punctate, divided onto 2 lateral and unpaired median sclerites. Lateral shields bearing bases of setae si and se, median shield bearing bases of setae vi, ve and c1. Setae vi situated anterior to level of setae ve. All propodonotal setae lightly beaded. Length ratio of setae vi: ve: si 1:2.2–2.3:3. Setae c1 located anterior to level of setae se. Two small and punctate hysteronotal shields, bearing bases of setae d1 and e2. Setae d1 situated closer to setae e2 than to d2. Pygidial shield strongly sclerotized, punctate. Setae f2 2.3 times longer than f1. Setae f1 twice as long as h1. Setae h2 11.5 times longer than h1. Genital plate present, punctate and strongly sclerotized. Aggenital setae ag1 situated anterior to level of setae ag2. Length ratio of setae ag1: ag2: ag3 2:1:2. Setae ps1 and ps2 subequal in length. Setae ps2 hair-like, situated on genital plate. Coxal fields I–IV well developed, apunctate. Setae tc”III–IV slightly (1.1–1.2 times) longer than tc’ III–IV. Legs. Most of dorsal setae of legs I and II, beaded. Antaxial and paraxial members of claws III and IV subequal in size. Setae 3c 2.3–3 times longer than 3b. Lengths of setae: vi 25–30, ve 55–70, si 75–90, se 120–140, c1 130–140, c2 120–130, d1 115–130, d2 115, e2 125– 140, f1 40–45, f2 70–90, h1 20–30, h2 230, ps1 10–15, g1 15, 1a 45–50, 3a 40, ag1 90–100, ag2 55, ag3 115, l’RIII 20, l’RIV 20, tc’III–IV 40, tc”III–IV 45–50, 3b 20–30, 3c 60–70.

MALE. Unknown.

Type material examined. Locustella naevia (Boddaert) (Passeriformes: Sylviidae): female holotype (nonphysogastric form), 1 female paratype (non-physogastric form), (AMU –SYR.67) (bod.); POLAND, near Swinoujscie, October 2000, coll. G. Kiljan.

Type material deposition. All material deposited in the AMU.

Non-type material examined. Locustella luscinioides (Savi) (Sylviidae): 4 females (non-physogastric) (AMU –SYR.126) (bod.); POLAND, Zachodniopomorskie, near Swinoujscie, October 2000, coll. G. Kiljan. Material deposited in the AMU.

Host range and habitat. Oligoxenous species inhabiting quills of body feathers of Locustella naevia and L. luscinioides.

Distribution. Poland.