Ripiphorus aurantus Rivnay 1929

Rhipiphorus aurantus new species
Rh. aurantus differs from Rh. mutchleri and Rh. simplex in having no markings along the abdominal segments; from the other species that have a reddish-yellow abdomen, it may be separated by the form of the hind tarsus and the antennae.
Very robust. Head and prothorax black, abdomen red-yellow, first tergite brown, pygidium red-yellow with the apex and an arched line projecting toward dorsum brownish, legs brown, tarsi yellowish-brown, wings smoky. Vertex broadly rounded, slightly carinate, closely punctate; frons concave, coarsely punctate above, convex and finer punctate below. Clypeus broadly rounded, with slight emargination. Antennae short, 10 segmented, rami long, 1.5 subequal, from 5 to 8 reducing in length. Pronotum finely and uniformly punctate, median line distinct and more depressed and broad on middle disc, no distinct glabrous areas on the sides of it. Scutellum bi-lobed, a median carina dividing it into
two distinctly concave and finely punctate areas. Elytra broad at base, narrowly rounded at apex, sutural margin emarginate. Sides of metascutum sparsely punctate, abdomen broad, sides parallel, first tergite finely punctate. Second tergite smooth and glabrous, others coarsely punctate with a small smooth glabrous area on each side and in the middle. Under surface of thorax and abdomen punctate and pubescent. Pygidium coarsely punctate with two concave smooth glabrous areas in the middle. Legs comparatively short and strong, hind tibia slightly curved and distinctly longer than tarsus. First segment of hind tarsus about as long as all others together, very little thicker, but distinctly truncate and emarginate at tip.
Length, 10 mm.
Monotype. — Female; Tarrant Co., Texas, Aug. 17, 1902 (Hooker). [U. S. National Museum, No. 41864.]
The hind tarsi of this species are of a form which may be considered as an intermediate stage between those which have the first segment broad, short, and obliquely truncate; and those which have the first segment as long as all others combined. In this case the first segment of the hind tarsus is broad and obliquely truncate at apex, but is as long as all the others combined.