Hormathus albisetosus Lingafelter, 2024

Hormathus albisetosus Lingafelter , new species

( Fig. 10, 12 View Figures 9–12 )

Diagnosis. The size, proportions, red head and prothorax, and dark purplish-black elytra with rows of white setae are very reminiscent of the Jamaican Trichrous lineolatus (White) . However, H. albisetosus is easily distinguished by the pronotum which is cylindrical and much longer than wide (rounded and only slightly longer than wide in T. lineolatus ) and the much smaller, circular eyes without an upper eye lobe (the upper eye lobe is pronounced and surrounds the antennal tubercle in T. lineolatus ). Among Hormathus species, H. albisetosus is most similar to Hormathus bicolor (Zayas) and some forms of H. cinctellus (Gahan) that share a red head and pronotum and dark purplish-black elytra. However, it is easily distinguished from all Hormathus species by the presence of two rows of white setae extending from near the base to near the apex of each elytron.

Description. Holotype female. 9 mm long; 2 mm wide at humeri. Color: Head and prothorax red; elytra dark purplish-black; legs, antennae, venter of meso- and metathorax and abdomen dark reddish-brown to piceous.

Head. Slightly raised antennal tubercles, rounded at apices. Sparsely, shallowly punctate, mostly on frons and vertex, with a few scattered punctures on antennal tubercles. Mostly glabrous except for a few long, translucent setae around lower eye lobe and margins of gula and frontoclypeus. Eyes small, approximately the width of antennal tubercle at base, round, unlobed, with fine ommatidia. Antennae filiform, unspined, not carinate, not attaining elytral apices. Third antennomere longest; approximately 1.3 × longer than scape; fourth antennomere shortest; 5–8 each successively, slightly longer; 9–10 slightly shorter and subequal to each other; 11 slightly longer and rounded at apex. Antennomeres with vestiture of very short, inconspicuous setae and sparse, scattered, longer translucent setae along ventral and apical margins.

Thorax. Pronotum glossy, cylindrical, impunctate, glabrous; without lateral tubercles, with 2 slightly raised anterodorsal tubercles (visible in lateral view); 1.45 × longer than wide. Prothorax strongly elevated at anterior half when viewed laterally. Prosternal process narrow between procoxae with apex strongly expanded about to width of procoxa, closing procoxal cavities posteriorly. Mesosternum and metasternum with fine, appressed, short, white pubescence laterally; mostly glabrous at middle. Mesosternal process over twice width of prosternal process between coxae. Elytra shiny and mostly glabrous and impunctate except for two longitudinal rows of punctures from near base to near apex, each bearing a suberect, white seta. Other white setae present near base, between two rows and at outer margin at apical half. Elytral apices truncate, lacking spines. Scutellum rounded, with short, appressed, translucent setae. Femora clavate with apices rounded. Metafemora attaining apical fourth of elytral apices.

Abdomen. Shiny and mostly glabrous and impunctate except for a few long, pale white setae. Apex of last ventrite broadly rounded.

Type material. Holotype (male): DOMINICAN REPUBLIC: San Juan Province, Las Matas de Farfán , La Jagüita Los Jobos, 24 May 1981, Marcano ( USNM) . Paratypes: DOMINICAN REPUBLIC: Pedernales Province, west of Oviedo, Parque Nacional Jaragua, 17.79186°N, - 71.46302°W, 2 May 2024, Jiri Pirkl and Jiri Hodecek (2 females, 1 male, JPPC).

Etymology. This species name is derived from the pattern of white setae in two rows on each elytron.

DICHOPHYIINI Gistel, 1848 Trichrous Chevrolat, 1858