Rideriana amazonica sp. nov.

Figs 1-8

Male (Fig. 1). Body length 15.42 (15.20-15.70); head length 2.37 (2.32-2.48), head width 3.09 (3.04-3.12); length before eyes 1.46 (1.44-1.52); width between eyes 1.81 (1.76- 1.84); pronotal length 3.57 (3.44-3.68), pronotal width 8.56 (8.40-8.80); scutellar length 6.68 (6.64-6.72), scutellar width 5.44; corium length 8.93 (8.48-9.20); length of antennal segments: I 1.20 (1.12-1.28); II 0.42 (0.40-0.48); III 3.76 (3.68- 3.84); IV 3.84; V 4.04 (3.92-4.16).

Dorsal surface of body castaneous to yellowish-castaneous, densely punctured; punctures dark-castaneous. Ventral surface yellowish with scattered ferrugineous to black punctures, bigger than dorsal punctures of thorax. Lateral margins of jugae finely black bordered. Antennal segments II, III and IV reddish-castaneous; segment I mate, densely punctured; segment V yellowish, punctures faded.

Pronotum cicatrices inconspicuous. Mesosternal carina yellowish; metasternal carina reddish, black punctured. Evaporatory areas yellowish. Legs mate, with castaneous maculae; tarsi reddish, immaculate. Spiracles black sided entad by yellowish callus.

Genitalia. Hypandrium (hy) strongly developed, longer than the pygophore, along mid line bifurcated, each ramus laterally flat, apex digitiform (Figs 2-4). Parameres geniculate, apex turned to the bottom of genital cup (Fig. 5). Phallus. Vesica well-developed; apical half turned ventrad, with a pair of processes, one basal – processus vesicae 1 (prv1) more sclerotized, longer, ventrally directed, and one apical – processus vesicae 2 (prv2) membranous, shorter, posteroventrally directed. Ductus seminis distalis very long, almost twice the length of vesica, emerging from its base, projecting ventrad and folding dorsad, the apical fifth directed posteriorly (Figs 6-8).

Female unknown.

Type material. Holotype male: PERU, Cuzco: Prov. Paucartambo, Hacienda Maria, Shores of River Cosnipata, 15.III.1952, F. Woytkowski leg., J.C. Lutz Collection 1961 (USNM ). Paratypes: BRAZIL, Acre: 11 Km Ne do Rio Branco, 06.V.1981, Jorge Arias leg., 1 male (INPA). BOLIVIA, La Paz: Mapiri (N. La Paz), 10-16.VIII.1989, L.E. Peña leg., Coll. Drake, 1 male (USNM).