Beltia placidula Bechynĕ, Bechyne, 2018

Flowers, R. Wills, 2018, A review of the genus Beltia Jacoby (Chrysomelidae: Eumolpinae: Eumolpini), with descriptions of fourteen new species from Costa Rica, Panama, and northwestern South America, Insecta Mundi 672, pp. 1-43: 18-19

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Beltia placidula Bechynĕ

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Beltia placidula Bechynĕ   , new combination

Figures 14 View Figures 9–17 , 32 View Figures 27–35 , 52 View Figures 50–56 , 68 View Figures 67–74 , 78 View Figures 78–79

Colaspoides placidula Bechynĕ 1950b: 226   , original description; Bechynĕ 1953: 279. Holotype male at USNM, seen, labeled: TINGO MARIA, ( Río Huallaga ) 700m, X. 1947, leg Weyrauch //WKW 3851// Type // HOLOTYPE Colaspoides placidula   m. det. J. Bechynĕ 1950// HOLOTYPE USNM 66979 View Materials //USNMENT 00911436   .

Redescription. Male. Body ovate, dorsally convex; length 5.0– 5.8 mm. Head metallic golden green, pronotum and elytra greenish gold with reddish coppery reflexion, scutellum metallic green; antennae testaceous with apical two or three antennomeres darker, legs testaceous. Underside metallic bluish green.

Head. Clypeus densely punctate, punctures separated by distance slightly greater than their diameters. Frontoclypeal suture distinct. Frons strongly punctate, surface between punctures smooth to weakly alutaceous, punctures separated by distance subequal to their diameters; vertex with a distinct median impressed line, punctures aciculate, surface between punctures smooth.

Thorax. Prothorax distinctly wider than long, L/W = 0.6; disc regularly, finely punctate, with punctures separated by distance greater than their diameters; surface between punctures glossy, with numerous punctulae. Prosternum wrinkled, sparsely punctate, with short whitish setae, posterior margin of intercoxal process slightly concave, width of intercoxal process equal to diameter of procoxa. Metasternum smooth, metepisternum finely alutaceous.

Elytra. Evenly punctate, punctures separated by distance greater than their diameters, surface between punctures with small punctulae; width across humeri 1.02× width across pronotum. Basal calli moderately developed, postbasal depression shallow.

Abdomen. Sterna with numerous short setae and long setae along middle third at rear margin of segments III–VI, surface of segments alutaceous. Tergites II and III with a basal row of spicules, tergite IV with spicules laterally; surface of tergites V and VII shagreened.

Genitalia. Median lobe in lateral view strongly curved and bent downward, a blunt projection at middle of lateral margin ( Fig. 52a View Figures 50–56 ); in en-face view with “arrowhead” consisting of well-sclerotized converging lateral margins broadly curved to a sharp asymmetrical projection ( Fig. 52c View Figures 50–56 ). Apex of endophallus ( Fig. 52b View Figures 50–56 ) with field of small spicules and a small apical sclerite.

Female. Length 5.4–6.2 mm; color of head, pronotum, and elytra golden green with strong coppery reflexion; underside dark blue; antennae testaceous with apical three antennomeres piceous; legs vary- ing from dark testaceous to dark metallic blue.

Head. Punctation as in male.

Thorax. Pronotum with proportions and punctation as in male. Surface of prosternum more rugose than in male, posterior margin less concave. Metasternum and metepisternum as in male.

Elytra. As in male.

Abdomen. With scattered whitish setae, apex of sternum VII weakly crenulate with apical, shallow, V-shaped emargination, a subapical transverse costa with two small median projections present ( Fig. 14 View Figures 9–17 ).

Genitalia. Abdominal segments VIII–X forming elongate ovipositor (L/W = 6.67); sternum VIII elongate, needle-shaped ( Fig. 68a View Figures 67–74 ); spermatheca with elongate, bulbous receptacle ( Fig. 68b View Figures 67–74 ).

Specimens examined. (4♂, 4♀) PERU: Huánuco Region. (1♂, SEMC) Peru S.A., 6.7. 1939, Felix Woytkowski // Vic. Tingo Maria // Jungle, 670m a. s. l.;   (1♂, SEMC) Peru S.A., 6.7. 1939, F. Woytkowski No. 398, Loc, Shapahilla 630 m. a. s. l. 11 km. N. E. Tingo Moria [sic].   San Martín Region. (1♂, SEMC) Peru, S.A., Oct. 15 1936, F. Woytkowski, No. 3758; Seritor, 21 Km W. of Rioja;   (1♀, SEMC) same locality and collector, Sept. 30, 1936, No. 3757;   (1♀, FSCA) Moyabamba, vic., Ecológico Rumipata ”, 13–18-X-2012 J.E. Eger; S06°04′32.0″; W076°58′07.5″, 970m elev. GoogleMaps   Loreto Region. (1♀, FSCA) nr. jct. Río Marañon & Ucayali. 73.5°W 4.8°S, 6–20-VIII-1994, P.E. Skelley; GoogleMaps   (1♂, 1♀, FSCA) same locality, date, and collector, day catch.  

Diagnosis. This species can be distinguished from B. angustomarginata   by the small pair of tubercles on sternite VII in the female. This character is shared with B. chiriquensis   , but the characteristic lightcolored tarsi of B. chiriquensis   will distinguish that species.

Remarks. The male can be distinguished from other species with “arrowhead”-shaped median lobes by the relatively weak patches of spicules at the tip of the endophallus. Beltia placidula   is distributed through the Amazonian region of northern Peru ( Fig. 78 View Figures 78–79 ).


USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]


USA, Kansas, Lawrence, University of Kansas, Snow Entomological Museum


USA, Florida, Gainesville, Division of Plant Industry, Florida State Collection of Arthropods


Smithsonian Institution, National Museum of Natural History














Beltia placidula Bechynĕ

Flowers, R. Wills 2018

Colaspoides placidula Bechynĕ 1950b: 226

Bechyne, J. 1953: 279
Bechyne, J. 1950: 226