Rhinanisodes planicollis, Zimmerman, 1942

Zimmerman, Elwood C., 1942, Curculionidae of Guam, Insects of Guam I, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 73-146 : 130-131

35. Rhinanisodes planicollis , new species (pl. 5, G).

Male: derm black, moderately shiny, appendages diluted with red, setae pale, inconspicuous.

Head not quite as long as its basal breadth, distinctly constricted on sides behind eyes, constriction feebly impressed across dorsum and only slightly interrupting continuous and otherwise evenly convex longitudinal dorsal contour of crown and front, when measured from above, the constriction length of an eye behind eyes as measured from above and only half length of an eye behind eyes as measured from side; area behind constriction minutely punctate, area beyond constriction and interocular area densely punctate, punctures small, their interstices narrow, some tending to be longitudinally confluent; interocular area twice as broad as breadth of an eye measured from above, usually slightly depressed; eyes separated from prothorax by length of an eye. Rostrum slightly arcuate, as long as head, not quite half as long as prothorax, evenly expanded to antennae, thence slightly concavely expanded to apex, greatest apical breadth only about one sixth greater than narrowest post-antenna! breadth; puncturation similar to that on interocular area, but finer beyond antennae, punctures usually distinctly longitudinally confluent behind antennae; antennae inserted slightly behind middle, distance between insertion and eye three fourths or about as long as length of an eye; scrobes narrow, their upper margins touching lower front edges of eyes, but scrobe hardly continued past fore margin of eye. Antennae with scape reaching well past hind margin of eye to cephalic constriction; first funicular segment stouter than 2 and about as long as 2 plus 3, 2 about as long as 3 plus 4, 3 to 5 successively more transverse, 5 about one fourth broader than 3; club as long as four preceding segments. Prothorax pyriform, distinctly longer than broad (2.5:2.2), broadest at about basal third, base truncate, strongly rounded on sides, rapidly narrowed beyond middle of apex, subapical constriction not very deeply impressed, as viewed from above, apex only slightly more than half as broad as greatest breadth of pronotum, disk distinctly depressed, hardly arcuate longitudinally, subapical constriction shallowly, but usually rather distinctly impressed across dorsum; puncturation dense throughout, punctures moderate in size, their interstices narrower or about as broad as their diameters. Elytra somewhat more than twice as long as broad (5:2.25), twice as long as prothorax, subparallel-sided in basal two fifths, thence arcuate to broadly rounded apex; striae well defined, slightly narrower than intervals on disk, their punctures broader than grooves and crenulating sides of intervals, tenth stria approximated by ninth above metacoxa, but continued narrowly to apex; intervals slightly convex, each set with a row of minute punctures bearing minute, hardly discernible, flecklike setae, ninth interval costiform beyond second ventrite and there almost straight and not curved upward, joining third interval at less than breadth of interval from apex. Legs with tibiae laterally compressed and expanded from base to apex, unci strongly developed and with a well-developed tooth at inner apical angle; tarsi with third segment slightly broader than second, truncate distally below and not at all lobed, fourth segment slender and about as long as preceding segments together. Sternum with prosternum almost twice as long in front of coxae as behind coxae, intercoxal process about twice as broad as breadth of a coxa; densely punctate, punctures laterally confluent in front of coxae; mesosternum on same plane as metasternum, intercoxal process twice as broad as a coxa; metasternum densely punctate, interstices usually narrower than their diameter, about three times as long between mid and hind coxae as breadth of a mesocoxa; metacoxae separated by twice breadth of a mesocoxa. Venter with first two ventrites rather densely set with small punctures, first broadly impressed in male; ventrites 3 and 4 coarsely punctate in their basal halves; ventrite 5 densely minuteiy punctate, finely setose. Length, 1.7-1.8 mm.; breadth, 0.5 mm.

Holotype male and one male paratype taken at Yigo, from "dead small leaf Ficus ", Oct. 18, 1936, Swezey ; and one male paratype, Mt. Alifan, found under dead bark of breadfruit, June 21, Usinger.