Mitrapsylla hamata sp. nov.

(Figs 117, 147, 177, 235 ‾237, 297, 327, 357, 377)

LSID: urn:lsid:zoobank.org:act: 56BF1305-EF5C-43E9-B6C5-64DADBE78599

Material examined. Holotype ♁, Brazil: Piauí, Parque APA (área de preservação ambiental) Delta de Parnaíba, Ilha Grande, -2.8583, -41.8167, 0 m, 28.vi.2016, Machaerium amplum (D. Burckhardt & D.L. Queiroz), #208(2) (DZUP 215415, dry).

Paratypes. Piauí: 41 ♁, 66 ♀, 197 immatures, same data as holotype (D. Burckhardt & D.L. Queiroz), #208(2) (DZUP, NHMB, dry, slide mounted, 70% and 100% ethanol) .

Diagnosis. Genal process, in dorsal view, subconical; with rounded apex; GL/VL 0.4–0.5. AL/HW 2.9–3.1. Forewing with dark brown median spot in cell r 2 apically; vein M 1+2 sinuous. Paramere, in lateral view, clavate, strongly expanded apically; apex deeply indented in anterior half, forming prominent hook in posterior half. Aedeagus complex unipartite; in lateral view, dorsal lobe subglobular; ventral process with apical expansion subequal in size with dorsal lobe.

Description. Colouration. Body with white striped-pattern; variation: vertex with stripe along lateral margins fused to dot adjacent to lateral ocellus, and stripe along posterior margin weak when present; mesoscutum with an additional stripe laterally, commonly fused to the sublateral forming a thick stripe; older specimens with markings with dark outline. Head and thorax dark yellow, yellowish-brown to orange; genal process lighter than head. Eye red to dark red; ocelli colourless to orange. Antenna yellow, segments 1–2 concolorous with head. Clypeus concolorous with head, sometimes slightly darker along edges; rostrum yellow to orange. Thorax sometimes brownish laterally, usually with margins of sclerites darker. Forewing colourless to slightly yellowish, yellow around veins apically; with dark brown median spot in cell r 2 apically; veins light yellow; pterostigma concolorous or slightly lighter than veins. Hindwing colourless. Fore- and midleg usually dark yellow usually with femora brown, hindleg light yellow usually with femur dark brown. Abdomen light yellowish-brown, light brown to medium brown, usually darker ventrally; intersegmental membranes light straw-coloured; spiracular sclerites concolorous with sternites. Male proctiger irregularly brown, paramere and subgenital plate irregularly dark yellow. Female terminalia dark yellow, proctiger irregularly brown apically and around anus.

Structure. Body length ♁ 2.6–2.7 mm (2.62± 0.04 mm), ♀ 2.8 mm (2.8± 0.04 mm) (3 ♁, 3 ♀). Genal process (Fig. 147) subconical, evenly narrowing towards rounded apex, 0.4–0.5 times as long as vertex along midline. Antenna 2.9–3.1 times as long as head width; longest terminal seta about as long as segment 10. Apical labium segment 0.1–0.2 times longer than head width and 0.6–0.7 times longer than median segment. Forewing (Fig. 177) 2.7–2.9 times as long as head width, 2.2–2.3 times as long as wide, obovoid, oval or subrhomboidal narrowly rounded apically; vein M+Cu 1 0.4–0.5 times as long as Cu 1; ratio a/b 1.5, M 1+2 sinuous; ratio c/d 0.8–0.9; ratio e/f 0.6–0.8. Surface spinules covering cell r 1 apically and cell m 2 basally, most of cell cu 2, absent in rest of cells; leaving spinule-free spaces along veins (Fig. 42). Radular spinules present in cell r 2. Metatibia 0.7 times as long as head width.

Terminalia. Male. Proctiger, in lateral view, 0.4 times as long as head width; with long, strongly tapered, weakly down-curved posterior lobe. Paramere, in lateral view (Figs 235 ‾237) 1.0 times as long as proctiger; clavate, strongly expanded apically; anterior margin strongly directed anteriorly in apical third, somewhat straight in median third; posterior margin broadly rounded in apical third, weakly concave in basal two thirds; apex deeply indented in anterior half, forming prominent hook in posterior half; inner surface (Fig. 236) covered with long setae, longer and thicker along posterior margin, with row of thick setae along apical anterior margin, several thick setae below sclerotised ridge and on apical posterior margin, and group of stout setae on apical posterior margin; in dorsal view (Fig. 297), sclerotised ridge produced into massive inward directed median tooth. Aedeagus (Fig. 237) complex unipartite; in lateral view, dorsal lobe subglobular; ventral process weakly upturned, with apical expansion weak, subequal in size with dorsal lobe, subglobular, bearing short, conical tubercle.—Female (Fig. 327). Proctiger, in lateral view, 1.1 times as long as head width; dorsal outline moderately concave distal to circumanal ring, apical extension sinuous, apex moderately upturned, smoothly to strongly obliquely truncate; circumanal ring 0.2–0.3 times as long as proctiger. Subgenital plate, in lateral view, 0.6 times as long as proctiger; apex well-developed; ventral outline almost straight to slightly sinuous, sometimes slightly notched subapically and convex apically; covered with long setae in median third and ventrally throughout, short setae in apical third, long setae at apex, and medium length setae on dorsum subapically, without seta-free patch subapically; in ventral view (Fig. 357), lateral margins evenly, weakly narrowing towards narrow, rounded apex.

Measurements (in mm) (2 ♁, 2 ♀). HW ♁ 0.71, ♀ 0.71–0.72 (0.71±0.01); AL ♁ 2.08–2.20 (2.14±0.09), ♀ 2.10–2.17 (2.13±0.05); LAB2 ♁ 0.17, ♀ 0.16; LAB3 ♁ 0.10, ♀ 0.09–0.11 (0.10±0.01); FL ♁ 1.92, ♀ 2.03–2.09 (2.06±0.04); TL ♁ 0.52–0.53 (0.53±0.01), ♀ 0.51; MP 0.29–0.31 (0.30±0.01); PL 0.30; DL 0.28–0.34 (0.31±0.05); FP 0.74–0.77 (0.75±0.02).

Etymology. From Latin hamatus = hooked, referring to the hooked paramere.

Distribution. Brazil: Piauí.

Host-plant. Machaerium amplum Benth. (Leguminosae, Papilionoideae, Aeschynomeneae).

Habitat. Unknown.