Bolarga nigriloba Linnavuori 1959

Bolarga nigriloba Linnavuori, 1959, combination reinstated Fig. 13 Bolarga nigriloba Linnavuori, 1956: 10. (nomen nudum: no description) Bolarga nigriloba Linnavuori, 1956 (unavailable or invalid, linked to Bolarga nigriloba Linnavuori, 1959) in Linnavuori, 1956: 10. Bolarga nigriloba Linnavuori, 1959: 92. Daltonia nigriloba (Linnavuori, 1959) in DeLong, 1982: 616. Material examined. 1♂: Cabañas, PARAGUAY [new country record], Dist. Caacupe, Epto. Cordillera, 9 XII 1980 / RD Cave colr / Bolarga nigriloba Linnavuori, Det. J.N. Zahniser 2025 / USNMENT01513513 [USNM]. 1♂: PARAGUAY: Central Dept., San Lorenzo, 5 December 1986, J. Kochalka / Det. J.N. Zahniser 2021 / USNMENT01513072. 2♀, same data, USNMENT01513033 and USNMENT01513469 [USNM]. Female. Abdominal sternites largely brown; with diffuse yellow markings laterally; with or without longitudinal narrow medial white band; posterior margins with narrow transverse band of white. Sternite VII mostly yellow, with some brown coloration anteriorly and with irregular brown macula medially at posterior margin. Posterior margin broadly excavated, medially with small tab-like production. Pygofer yellow with numerous brown markings; with numerous macrosetae on posterior half, some concentrated at apex but groups of setae not as well-defined as in B. boliviana. Notes. Linnavuori (1959) described this species and originally placed it in Bolarga. DeLong (1982) transferred it to Daltonia Oman, 1949, a North American genus containing three species. However DeLong’s placement was based only on superficial similarity, stating only that B. nigriloba is “…similar in color, form, and appearance…” to Daltonia estacadus (Ball). The more convincing placement is Bolarga, a South American genus of Deltocephalini. In contrast to Daltonia, B. nigriloba shares with the type species of Bolarga, B. boliviana, a more elongate and slender shape of the body, the unique produced ventral lobe of the pygofer (Figs. 12D–E, 13C) and aedeagus with a ventral unpaired, spinelike process (Figs. 12E, 13F). B. nigriloba therefore is here reinstated in its original genus.