Usingerius maculatus, Zimmerman, 1942

Zimmerman, Elwood C., 1942, Curculionidae of Guam, Insects of Guam I, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 73-146 : 94-95

11. Usingerius maculatus , new species (pl. 6, A, B).

Derm pale to dark reddish brown,,appendages usually mostly yellowish but often suffused with black; rather densely clothed with squamules, cephalic vestiture golden; pronotum either with entirely golden and pale yellow vestiture or variably suffused with dark-colored squamules; elytra subject to great variation in color pattern of vestiture, variably marked with areas of golden, pale yellow, whitish and dark brown squamules; scutellum with dense squamules and paler than its surrounding area; vestiture of legs and underside white to yellowish.

Head with crown coarsely reticulate, finely and densely punctate; interocular area about one fourth as broad as an eye measured from front, derm concealed by vestiture; eyes quite prominently protuberant. Rostrum gradually and slightly widened from base to apex, apex only slightly broader than base, one third longer then pronotum in male, one and three fifths as long in female, gently arcuate from base to apex; antennae inserted slightly beyond middle in female, slightly in front of apical third in male; with two finely punctate striae on either side above scrobe from base to antennae in female, otherwise shiny and impunctate dorsally; these striae much more coarsely punctate in male, their intervals appearing as carinae, and with prostrate setae to antennae, otherwise finely punctate. Antennae with club of scape subequal in size and shape to first funicular segment; funicle with first segment as long as 2 plus 3, half as broad as long at rounded apex, 2 almost as long as 3 plus 4, 3 to 6 subsequal; club as long as preceding five funicular segments, constrictions and sutures between the three basal segments quite distinct. Prothora.,; much broader than long (8:5 to 7:4), broadest just in front of base, base with a distinct prescutellar lobe, sides broadly rounded to apical fourth, thence conspicuously constricted, constriction not distinctly impressed across dorsum; densely set with small, coarse punctures; squamules prostrate, directed anteriorly. Elytra five eighths as broad as long, three times as long as prothorax; dorsal contour slightly impressed at basal third, base subtruncate between scutellar emargination and rounded humeri, subparallel on sides to about middle thence broadly rounded to apices; striae well marked throughout, the punctures slightly broader than their striae; intervals slightly convex, more strongly so laterad and caudad, squamules prostrate, those along median lines directed straight back, those on sides directed obliquely inward and backward. Legs rather loosely clothed with rather shaggy hair, with femoral tooth large, triangular, as high along outer edge as breadth of apex of a tibia; tarsi with inner process of each claw reaching to about apical fourth of claw. Sternmn densely clothed with hair; with mesosternal process slightly protuberant; metasternum only slightly impressed in female, deeply canaliculately impressed down middle in male. Venter with first ventrite but slightly depressed in female, but with canaliculation very conspicuously continued from metasternum through second ventrite in male, canaliculate area almost free from hair, but with long, erect, curved hair along sides, more or less arched across canal; hair suberect or erect down middle of all ventrites in male, but mostly decumbent or slightly inclined in female; ventrites minutely punctate throughout. Pygidium hidden in female, usually broadly exposed in male and in that sex coarsely and densely punctate and with a slightly raised apical area. Length, 2-2.5 mm.; breadth, 1.2-1.3 mm.

Holotype male, Inarajan, May 7, 1936, Swezey ; allotype female, same place and time, Usinger; and following five paratypes: two, same data as allotype; two, Piti, from Pithecolobium , May 2, Usinger ; and one, at Sumay Road, from mangrove swamp, June 23, Usinger .

No two of the specimens have identical color patterns, but the species has a distinct, easily recognized facies.