Reduvius

Weirauch, Christiane, Russell, Kaleigh & Hwang, Wei Song, 2015, Reduvius frommeri, a new species of Reduviidae from the Western United States (Hemiptera: Reduviidae), with a synopsis of the Nearctic species of Reduvius Fabricius, Zootaxa 3972 (2), pp. 267-279 : 269

Key to the species of Reduvius in the Western Nearctic

(modified from Wygodzinsky and Usinger 1964). Morphological features are illustrated in Figs. 1–6 (habitus images and morphological details).

1 Total length in both sexes about 17 mm, coloration dark brown ( Fig. 3); medial process of pygophore square and truncate ( Fig. 5); aedeagus without projections on the basal plate extension ( Fig. 6)........................... R. personatus (Linné)

- Total length in both sexes 14 mm or less, coloration mostly light brown to pale yellowish, with brown or dark markings ( Figs. 1, 3); medial process of pygophore either with broad base and divergent, lateral rami or with narrow base and apical triangular rami ( Fig. 5); aedeagus with more ( R. frommeri , n. sp., R. senilis , and R. vanduzeei ) or less ( R. sonoraensis ) distinct projections on the basal plate extensions ( Fig. 6).................................................................. 2

2 Body uniformly pale yellowish, with head, scape, and labium dark brown to sometimes almost black, contrasting with pale coloration of pronotum ( Fig. 1); medial process of pygophore with narrow base and apical triangular rami ( Fig. 5).............................................................................................. R. frommeri , n. sp.

- Body light brown, with darker markings on hemelytra, head and pronotum of the same color, not contrasting ( Fig. 3); medial process of pygophore with broad, low base and divergent, lateral rami ( Fig. 5)..................................... 3

3 Eye barely reaching ventral margin of head (seen in lateral view) and dorsally not reaching the level of the ocellus ( Fig. 4; R. sonoraensis , grey arrow); scutellar process short ( Fig. 3; R. sonoraensis )....................... R. sonoraensis Usinger

- Eye surpassing the ventral margin of the head (seen in lateral view) and dorsally reaching to about the level of the ocellus ( Fig. 4; R. senilis and R. vanduzeei , black arrow); scutellar process long ( Fig. 3)........................................ 4

4 Total length in both sexes 13–14mm ( Fig. 3; R. vanduzeei ); aedeagus with basal plate projections tapering apically ( Fig. 6; R. vanduzeei )............................................................. R. vanduzeei Wygodzinsky and Usinger

- Total length in both sexes about 10–11mm ( Fig. 3; R. senilis ); aedeagus with basal plate projections broadly rounded ( Fig. 6; R. senilis )............................................................................... R. senilis Van Duzee