Dryotribodes obscurus, Zimmerman., 1942

Zimmerman, Elwood C., 1942, Curculionidae of Guam, Insects of Guam I, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 73-146 : 134-135

37. Dryotribodes obscurus , new species (pl. 5, A).

Female: derm coarsely reticulate, dull black, antennae and tarsi diluted with reel; setae pale; with a thin greasy incrustation.

Head as broad across eyes as length from pronotum to fore margins of eyes; shallowly constricted at about half the length of an eye behind eyes as measured from above, constriction only shallowly impressed across dorsum; almost impunctate behind constriction, but with a few microscopic punctures, coarsely, densely, subconfluently punctate beyond constriction, puncturation continuous with that of rostrum; eyes prominent, projecting for about half their breadths beyond lateral margins of head, subhemispherical; interocular area twice as broad as an eye as measured from above. Rostrum with longitudinal dorsal contour continuously and evenly arcuate with interocular area, five sevenths as long from fore margins of eyes to apex as prothorax and twice as long as basal breadth, subparallel-sided, but just perceptibly narrowed from base to antennae, thence expanded to apex, greatest apical breadth bearing the ratio 1.4 to 1.2 to the narrowest post antenna! breadth; very densely and coarsely punctate throughout, punctures tending to be in part subconfluent, their interstices much narrower than their breadths and making surface rough; antennae inserted at about middle at twice the length of an eye from fore edge of an eye. Antennae with scape stout, reaching to, but not past cephalic constriction; first funicular segment about one third longer than broad, as long as 2 plus 3, 2 longer than 3, 3 to 7 transverse, successively very slightly broader; club as long as the five preceding segments. Prothora.r longer than broad (2.0: 1.8), base truncate, apex slightly concave, slightly constricted on sides at base, thence evenly arcuate to well-marked subapical constriction; constriction not distinctly interrupting evenly arcuate longitudinal dorsal outline, broadest at about middle; puncturation coarse and dense, interstices coarsely reticulate, about half as broad as punctures on disk, discal punctures as broad as second funicular segment; setae decumbent, hardly discernible from above, but distinct when viewed from sides. Elytra coarsely reticulate, about twice as long as broad, two and one fourth times as long as prothorax, broadest behind middle, slightly arcuate near base, thence subparallel-sided, but evidently slightly expanded to apical third, thence constricted at apical fourth; striae coarse and deep, broader than intervals, their punctures large, coarse, subquadrate, not distinctly setose; intervals regular on disk, convex, more so behind, each bearing a row of distinct, decurved setae, sixth interval giving rise to three intervals above metacoxa, seventh interval, as counted at base, ninth as counted behind middle, prominently costiform behind third ventrite, joining third and reaching second at apex, but not interrupting lateral elytral outline. Legs with femora coarsely and densely punctured; tibial unci and tooth at inner apical angle well developed; third tarsal segment one fourth broader than second, deeply bilobed. Sternu.,111,with prosternum coarsely, deeply and densely punctured, about two and one half times as long before coxal cavities as behind, intercoxal process slightly narrower than breadth of a coxa; mesosternum coarsely punctate and slightly broader between mesocoxae than breadth of a coxa, intercoxal process on same plane as metasternum; metasternum coarsely, deeply, closely punctured, not quite twice as long between mid and hind coxae as breadth of a mesocoxa, metacoxae separated for about length of metasternum between mid and hind coxae. Venter with first two ventrites tumid, but slightly depressed medially, puncturation coarse, deep, dense, and similar to that of metasternum; ventrites 3 and 4 each with a complete row of coarse, closely set punctures; ventrite 5 densely set with coarse punctures similar in size to those on first two ventrites. Length, 3'.0 mm.; breadth, 1.1 111111

Holotype female taken by Swezey from a rotten stem of Barleria at Piti , Sept. 26, 1936.