Anthrax austrinus Marston, 1970

(Figs. 1–6)

Anthrax austrinus Marston, 1970: 41, 42, 80–81; Painter, Painter & Hall, 1978: 30; Evenhuis & Greathead, 1999: 293.

Female: Length: 16.3­17.9 mm. Head width: 2.5–2.6 mm. Thorax width: 3.2–3.4 mm. Abdominal width 3.9–4.4 tapering to 1.0– 1.8 mm on anal segment. Coloration: light brown; cephalic and anal tubercles and abdominal chitinous rods dark brown, darker apically; setae yellowish.

Head. Cephalic tubercles armed with three pairs of spines fused basally. First pair same length as second pair, directed downwards; third pair 2/3 length of others, and placed laterally (Figs. 2 and 3). Central pair of spines with two pairs of setae, first pair on dorsal surface, near its base, second placed laterally on the basal half of the spine (Fig. 3). In ventral view, anterior facial tubercle half length of central pair, with a pair of setae placed laterally, additional pair on posterior margin; posterior facial tubercle missing (Fig. 4).

Thorax. With four pairs of setae, two pairs on dorsal surface placed close together, two pairs on lateral surface; prothoracic spiracle heavily sclerotized, dark brown, raised above surface and located immediately behind head (Fig. 1).

Abdomen. Segment I with transverse row of long setae interrupted in center; segments II–V with transverse row of chitinous rods, gradually shorter beyond lateral margins, intercalated with long, thin setae, row of setae interrupted medially; segments VI–VII with reduced chitinous rods, resembling small spines, intercalated with thin setae; segment VIII only with row of reduced chitinous rods; pleura and sternites with row of strong and long setae, sternites with a complete transverse row located in middle of the segments (Fig. 1); anal tubercle with three pairs of spines, central pair completely fused, except at apex; the second and third pairs tiny and located on the base of the first pair, on dorsal and ventral surfaces respectively; additional single spine on dorsal base of the tubercle (Figs. 5 and 6); abdominal spiracles slightly darker and more sclerotized than surrounding area, raised above surface and placed laterally on segments I–VII.

Male: unknown.

Hosts: Hymenoptera (Sphecidae) .

Distribution: Neotropical: Brazil (Rio Grande do Sul, Santa Catarina).

Examined material: BRAZIL, Rio Grande do Sul: Montenegro (Arroio Bom Jardim), 23,30­ X­1979, 2 females (Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ. Brazil ­ MNRJ).