Narvesus minor Barber 1930

Coscarón, María Del Carmen, 2014, Revision of the genus Narvesus Stål, 1859 (Hemiptera: Heteroptera: Reduviidae: Stenopodainae) and a new record for Argentina, Zootaxa 3811 (2), pp. 289-296 : 294

Narvesus minor Barber 1930

( Figs. 2 A–H)

1930 Narvesus minor Barber , 10:224.

Distribution. Argentina: Buenos Aires Province: Parque Costera del Sur; Misiones Province: Bocceti, Montecarlo, Zaimán; Río Negro Province: Lamarque; Bolivia; Brazil; Guyana; Honduras; Paraguay; Puerto Rico; Surinam.

Material studied. Argentina: Santa Fé Province: Colonia Macías (1♂, MACN). Neuquén Province (unspecified locality) (1♂, MLP) (Posterior legs missing).

Overall color, head, corium, and membrane light brown. Head in lateral and dorsal view with setigerous tubercles. Forefemora brownish yellow, mottled with many small, irregular, and dark brown markings, distally dark brown, Middle and posterior femora brownish yellow, distally dark brown. Fore and middle tibiae not curved, unarmed, yellowish in the base, apex and a sub median ring fuscous. Scutellum and clavus with whitish pilosity. Scutellum dark brown laterally and light brown at center. Membrane not homogeneously pigmented. Hemelytra light brown. Membrane mottled with many small, irregular, and dark brown markings on membrane. Discal cell of corium and external apical cell of membrane with small rounded spot at base and triangular one near apex, internal apical cell with small dark spot. Abdomen dorsally pale brown, connexival segments with one dark brown spot near intersegmental sutures. Pronotum covered with small setigerous tubercles. Pronotum with two longitudinal carinae. Abdomen beneath yellowish brown, medially in each abdominal sternal from sternum 2 to 6 with dark brown spot forming a longitudinal band. Postocular region 1.34-1.40 times as width as anteocular region width, anteocular region, from anterior margin of eyes to apex of antenniferous tubercles, less than twice as long as postocular. Eyes close together in ventral view. Eyes surpassing lateral margin of head in dorsal view, setae absent. One setigerous tubercle with two setae on the antenniferous tubercles. Ratio of antennomeres lengths (1: 1.80: -: -). Genae not produced. Jugae triangular, apex bifurcate and without setigerous or pilose tubercles. head divided in two lobes by a deep furrow just beyond the eyes. Ocelli at top of globular posterior lobe of head and this lobe divided medially. Ratio of labial segment lengths (1: 0.90: 0.57), first labial segment wider than interocular ventral space. Posterior lobe of pronotum width, at humeral angles, 1.74-1.81 times as width as anterior lobe of pronotum, at collar angles. Collar angle spiniform, rounded apically and divergent laterally, humeral angle triangular, not prominent, with rounded apex. Posterior lobe of pronotum width, at humeral angles, 1.78 times as width as collar lobe of pronotum, at posterior angles. Posterior lobe of pronotum twice wider than length. Scutellum with setigerous tubercles at base of each lateral margin, posterior process of scutellum elevated with tip rounded. Fore femora covered with small setigerous tubercles and a row of spiniferous tubercles ventrally. Forefemora thicker than mid and hind femora, 1.32-1.53 times as wide as middle femora width and 1.10-1.25 times as wide as posterior femora width. Posterior femora longer than fore and middle femora, 2.36-2.58 times as long as forefemora long and 2.32-2.46 times as long as middle femora long. Hind tibiae very long (more than 2 times longer than others). Ratio of tarsi (1: 1: 1.4). Abdomen beneath carinate along segment II to VI. Hemelytra not reaching apex of abdomen.

Male genital as in seen in Figs. 2 C–G.

Parameres of both species apically expanded, lobe-shaped, widened in second one-third of their length. Curved inwardly medially. Presence of hairs from middle to apex. The parameres of N. carolinensis are more robust than those of N. minor and the constriction, located before apical lobe, is fainter ( Figs. 1 G, 2G).

Figures

FIGURE 1. Narvesus carolinensis. A dorsal view, B lateral view, C – E genital capsule: C ventral view, D dorsal view, E lateral view, F aedeagus lateral view, G paramere dorsal view, H fore leg. Ae: aedagus, Pa: paramere, Pac: constriction of paramere.

FIGURE 2. Narvesus minor. A dorsal view, B lateral view, C – E genital capsule: C ventral view, D dorsal view, E lateral view, F aedeagus lateral view, G paramere dorsal view, H fore leg. Ae: aedagus, Pa: paramere, Pac: constriction of paramere, Spt: spiniferous tubercles.