Corynellus lutescens, sp. nov.

Figure 3

DESCRIPTION: Holotype female. Length 8.8 mm; width: 3.2 mm. Integument shining, with head, pronotum and elytra brownish orange, antennal insertions, basal segments of antennae, one longitudinal and elongate macula on each side of pronotum and small spot medially, adjacent to base of pronotum black, apical segments of antennae, venter and legs light brown. Head: Front subquadrate, almost glabrous, with small contiguous-confluent punctuation; clypeus inclined and slightly depressed transversally on union with front; middle suture extending from clypeus to interantennal area; vertex with erect, scattered setae, not obscuring integument; eyes with lower lobes 1.5× longer than genae, upper lobes 0.5× width of scape base and separated by 0.7× length of scape; antennal tubercles internally prominent, obtuse; antennae 0.7× length of body; antennal formula (proportion) based on third antennomere: scape = 1.1, II = 0.13, IV = 0.77, V = 0.88, VI = 0.66, VII = 0.63, VIII = 0.5, IX = 0.5, X = 0.44, XI = 0.44; first six antennomeres cylindrical, slightly thicker toward apex, antennomeres VII–XI slightly expanded and flattened laterally, with external apex extending posteriorly, antennomere XI with apex rounded, antennomeres I–V clothed with black, erect setae, longer and more abundant on internal margin, remaining antennomeres with short, semi-prostrate grey setae, not obscuring integument. Thorax: Pronotum 1.4× wider than long, sides broadly rounded, slightly wider basally; base 1.3× wider than apex; basal and apical margin straight; disc flat, with small, longitudinal, oblong protuberances on each side and another small, feeble protuberance adjacent to base on midline, with small, distinct punctures, separated from each other by one or two times their diameter, with short, dense, bright gold pubescence at sides of base and apex. Prosternum transversally depressed, superficially striate, with scattered elongate punctures and short, sparse pubescence; procoxal process narrow, apex rounded; procoxae widely open behind and strongly angulate laterally; mesosternum short, sparsely pubescent, mesocoxal process narrow, 0.25× width of mesocoxae, apex rounded, with median notch; metasternum glabrous except scant pubescence on sides. Scutellum apex rounded, longitudinally depressed, with erect, dense pubescence, obscuring integument. Elytra: 2.5× longer than wide; sides gradually expanded toward apex from behind humeri to apical fifth, then curved inward; feebly bicostate, with one costa medially extending distally from near base to last quarter and another closer to suture and extending from base to distal third; with small punctures, basally deep but apically becoming more superficial, separated by one or two times their diameter; clothed by short, fine pubescence and erect, sparse, scattered setae. Legs: Short, femora clavate with intermediate and posterior femora pedunculate; meso- and metafemora 1.5× longer than profemora, with clavate portion almost half as long as femora, in profemora, clavate portion two thirds length of femora; protibiae and metatibiae curved, mesotibiae straight; femora with erect, sparse golden setae, tibiae with setae darker and more abundant, apical half of protibiae thickly covered by setae; tarsi with pad. Abdomen: tapering distally, glabrous except for erect, long, scattered golden setae; last sternite with apex widely truncate, fimbriate apical margin.

TYPE MATERIAL: Holotype female (CNIN): MEXICO: Veracruz: Municipio de San Andrés Tuxtla, Estación de Biología de Los Tuxtlas, 160 m, 30.IV.1985, A. Ibarra. Paratype female (LGBC): MEXICO: Veracruz: Municipio de San Andrés Tuxtla, UNAM Field Station Los Tuxtlas, 35 km NE Catemaco, 23–24.IV.1991, F. T. Hovore.

DIAGNOSIS: This species resembles C. mimulus, from which it may be separated by the sides of the pronotum being broadly rounded and the elytra superficially bi-costate and punctate. In C. mimulus, the sides of the pronotum in apical half are almost straight and abruptly rounded in the basal half, the elytra lack costae but are deeply punctate. This species is distinguished from C. cinnabarinus Chemsak and Linsley, 1979, another species with reddish-orange integument, by the pronotum with sides less rounded and the apical third of disc without a depression. In addition, both the pronotum and elytra are sparsely pubescent; in C. cinnabarinus, the sides of the pronotum are strongly rounded and the disc has a single depression in apical third extending from the sides to the midline and the pubescence of the pronotum and elytra is dense.

ETYMOLOGY: This species name refers to the brownish-orange color of its body.