Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 73. (Budapest 1981)

Hołyński, R.: Buprestidae (Coleoptera) from Vietnam

pattern of whitish pubescence is seen, including vertex, anterior angles of pronotum and lanceolate spot on basal half of its median line, as well as common "owl face" contour at middle, two very irregular and indistinct oblique postmedian fasciae and the extreme apex of elytra. Underside sparsely covered with short, whitish pubescence. — Epistome trapezoidal, ca. 2.5 times as wide as long, with sharply prolonged anterior angles, broadly emarginate at apex, separated from frons by distinct, slightly arcuate ridge; surface finely, transversely strigose. Frons inversely trapezo­idal (length: upper width: epistomal width = 1:3.3:2.4—length being measured from clypeofrontal suture to line connecting uppermost points of eyes), broadly concave in dorsal aspect, with deep fovea on median line and sharp oculofrontal ridges, strongly produced before anterior angles of pronotum; surface sparsely, shallowly punctured anteriorly and marked with distinct circles towards vertex. — Pronotum short (3.6 times wider than long), widest just before base, roundedly narrowed basally to 0.99, apically to 0.54 its maximal width. Anterior margin slightly bisinuate with protruding, acute angles ; sides obliquely arcuate (more strongly so near base) to posterior angles, which are decidedly acute; base arcuately emarginate laterally, more deeply so to both sides of broadly triangular prescutellar lobe, which is truncate before scutellum. Sides of pronotum flattened, becoming very broadly so towards base, with distinct foveae near anterior and posterior angles; transversal depression along base deeper at middle, delimiting broadly triangular elevation on ante­romedian part. Pronotal sculpture consists of dense and strong (except on anterior elevation, where they are sparse and indistinct) circles. — Scutellum almost equilaterally triangular, convex, smooth. — Elytra as wide as pronotum at base, rectilinearly narrowed to near middle, then a little more strongly so to apices, which are broadly, conjointly rounded. Denticulation of lateropos­terior margin extremely fine, hardly appreciable at x 20 magnification. Humeri not prominent; lateral carina fine but distinct, reaching from humeral protuberance to near apex. Posthumeral depression between carina and lateral margin oblique, rather strong; a pair of shallow depressions runs along base between scutellum and humeri; another pair extends on both sides of apical half of suture. In lateral aspect, elytra rather deeply sinuate just behind metacoxae and less markedly so before apex; epipleura distinct, reaching to near apex. Elytral surface covered with fine, rather sparse punctulation. — Prosternai process a little shorter than wide, slightly convex, reaching its maximum width near middle and arcuately narrowed towards base and apex (Fig. 2). Sides distinctly marginate; surface rather sparsely sculptured with fine circles enclosing coarse punctures. The rest of undersurface convex, with similar (more dense laterally) sculpture. Latero­posterior angle of metacoxae rather blunt. Measurements — Total length : 3.45 mm (measured from line connecting most advanced points of oculofrontal ridges to apical angles of elytra). — Length of pronotum: 0.58 mm (measured along median line). — Length of elytra: 2.81 mm (measured from line connecting most advanced points of anterior lobes to apical angles). — Maximum width of head: 1.03 mm. — Maximum width of pronotum: 2.12 mm. — Maximum width of elytra: 2.12 mm. T. topali sp. n. runs to the couplet 97(96) in OBENBERGER'S (1929) key, but this turns out a cul-de-sac, since the new species shows neither "anterior margin of the pronotum simply emarginate, without any trace of median lobe" as in 98(113), nor "elytral carina indistinct or hardly distinct" as in 113(98). In the key of DESCARPENTRIES & VILLIERS (1966b) it runs to Habroloma paviei D.V. (if one accepts the epistome as being three times wider than long), or, if "twice as wide as long" is considered closer to the truth, one must decide between the prosternai process "distinctly transversal" (H. longipilis D.V.) and "almost as long as wide at apex" (H. perroti D.V.). All the three are much smaller (2.25-2.3 mm) and have rather regular fasciae of white hair on the background of apparently uniform "blond" —in T. longipilis (D.V.) —or "dark" pubescence; besides, T. longipilis (D.V.) is "bronzed golden" above, while in T. paviei (D.V.) the first postmedian elytral fascia runs perpendicularly to the suture in­stead of being oblique. I name this species in honour of its collector, DR. G. TOPÁL. Trachys (Habroloma) tecmessa kaszabi ssp. n. (Figs. 3-4) "Vietnam. Yu do, 4. XII. 1971", 1 ex., holotype. Cuneiform, convex, elongated. Dorsal side brownish black with distinct brassy tinge, ventral side (including antennae, palpi and tarsi) black. Pubescence moderately dense, tricoloured: white hair covers greater part of pronotal surface forming complicated, anastomosing system of elytral 9 Természettudományi Múzeum Évkönyve 1981

Next

/
Oldalképek
Tartalom