New species and records of Macrodactylus Dejean (Coleoptera: Scarabaeidae: Melolonthinae: Macrodactylini) from Bolivia Author Arce-Pérez, Roberto Red Sistemática y Biodiversidad, Instituto de Ecología, A. C. Apdo. Postal 63, Xalapa, Veracruz 91000, Mexico. roberto.arce@inecol.mx Author Morón, Miguel Ángel Red Sistemática y Biodiversidad, Instituto de Ecología, A. C. Apdo. Postal 63, Xalapa, Veracruz 91000, Mexico. miguel.moron@inecol.mx text Zootaxa 2014 2014-08-28 3857 2 292 300 journal article http://dx.doi.org/10.11646/zootaxa.3857.2.8 09b8963f-3aa7-4914-9242-09d5968cfe35 1175-5326 229717 6D902CD0-7A28-485F-A91E-E23EE74C8907 Macrodactylus gracilis Moser, 1918 ( Figs. 20 –21 , 26– 29 ) Diagnosis . Body integument dark red; frons and antennal club black; clypeus, funicle, mouthparts, and legs reddish yellow. Body completely covered with scale-like, yellow, short setae; tarsi with rings of white setae; parameres glabrous. Redescription . Male: Body length 8.2 mm ; humeral width 2.30 mm . Color: Body dark red; clypeus intensely red; frons and antennal club black; funicle, mouthparts, and legs reddish yellow. Surface: Completely covered with scale-like, yellow, short setae that obscure the surface. Head: Form elongate.Clypeus trapezoidal, anterior border nearly straight.Antenna with funicle reddish yellow and club black. Labial palpi short. Mentum elongate and oval, longitudinally with wide furrow, with sparse setae on surface. Thorax: Pronotum hexagonal, dark red, convex; completely covered with yellow short setae that obscure the surface; wider than long ( 1.95 : 1.90 mm ). Prosternal process long, robust, curved, more robust at apex. Scutellum subtriangular, long, apex acute. Elytra yellowish red; completely covered with scale-like, yellow, short setae that obscure the surface. Metasternum wide, with dense and abundant rows of long, slender, clear yellow setae between mesocoxae and metacoxae. Abdomen: Sternites 2–5 concave, with dense rows of long, stout, clear yellow setae; length of sternite 5 twice length of sternite 4 ; sternite 6 ovate with sparse stout, long setae. Pygidium elongate, ovate, with setae evenly distributed. Legs: Profemur with subrectangular projection near base scarcely developed. Mesotibia widened toward apex; with 2 straight, acute spurs and long, stout setae around apex; largest spur with rounded apex and smaller spur with acute apex. Tarsi enlarge; apex black, with rings of white setae and long spine-like setae. All tarsal claws long and cleft. Genitalia: Total length 2.05 mm . Parameres long and slender, oval, glabrous; narrow and fused dorsobasally; enlarged and widened toward the apex; apex lanceolate; length 0.95 mm , width 0.60 mm ( Figs. 26–28 ). Female : Body length 8.4 mm ; humeral width 2.70 mm . Similar to males except as follows: Pronotum length 1.75 mm , width 2.15 mm , with elevated “X” pattern. Abdominal sternites convex without distinct setae; pygidium short, width, subtriangular. Genital plates long, oval, with apex asymmetric; length 0.90 mm , width 0.42 mm ( Fig. 29 ). Material examined : Bolivia , Yungas , Coroico . Fassl, 1908 , ( 1 male , 1 female MHNW ). Natural history . No precise details on the habits of this species are available. It was described from “ Bolivia (Tonampayo)” but this location was not found in any other reference. Remarks. Externally, M. gracilis is very similar to other South American species of Macrodactylus , but the sculpture of the female pronotum and shape of male and female genitalia help to distinguish this species.