Trigonops vulgaris, Zimmerman., 1942

Zimmerman, Elwood C., 1942, Curculionidae of Guam, Insects of Guam I, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 73-146 : 92-93

9. Trigonops vulgaris , new species (pl. 1, G; fig. 1 , b).

Derm dark reddish brown to black; scaling variable, basically brownish gray to grayish brown, often with some dark brown scaling, prothorax usually with lateral scaling paler and often with a pale median vitta, with at least a patch of dark scales in front of elytral intervals 2 and 3; elytra usually with a broad V-shaped fascia of paler scales.

Head with the small punctures almost all concealed by dense scaling, usually with a small bare spot, or short bare vitta adjacent to apex of interocular suture; eyes quite strongly protuberant, subhemispherical, abruptly interrupting lateral cephalic outline, obviously shorter than distance between them. Rostrum with area between transrostral carina and basal suture normally flat or but slightly longitudinally convex and slightly or distinctly depressed below level of transrostral carina, distance between carina and basal suture obviously shorter than narrowest interocular breadth, with or without a trace of a median carina; apical declivitous part finely to coarsely punctate, squamae scattered except for usual condensation at base. Antennae with scape longer than seven funicular segments, setae usually, but not always, conspicuously slanting away from derm; funicular segments as follows in length: (1, 1.3) (2, 1.2) (3, 0.9) (4, 5, 6, and 7, 0.8); TODO club as long as three preceding funicular segments, its first segment a third or a fourth longer than second. Prothora.1: slightly broader than long, broadest at about middle and rather evenly arcuate on sides; disk closely set with moderately large punctures, interstices narrower or broader than punctures and densely squamose, setae inserted at outer edges of punctures, transversely placed, usually quite closely appressed and extending across their punctures. Elytra about three fourths as broad as long, twice as long as prothorax, broadest somewhat before middle, broadly arcuate on sides to about apical third thence strongly narrowed to apex; striae well defined throughout, discal punctures often preceded by small tubercles near base; intervals flat to slightly convex on disk, densely squamose, scales finely to rather coarsely reticulate, rounded or angular, flat, closely appressed to derm, discal setae usually quite conspicuous and slanting steeply away from derm, but in some individuals much shorter, decumbent and not conspicuous, normally longer and more erect on declivity, often with a fe~ble sutural fascicle on declivity. Legs with hind femora reaching to about middle of fifth ventrite in female and about to apex in male, setae usually slanting away from derm, especially along lower edge of shaft, but often rather closely appressed dorsally; hind tibial setae bristling. Sternum with prosternum one half as long between fore margin and coxal cavity as between cavity and hind margin, intercoxal process one fourth to one third as broad as a fore coxa, coarsely punctate, densely squamose; mesosternum with side pieces, excluding bare space adjacent to coxae, densely squamose; metasternum more than three fourths to about as long between mid and hind coxae as breadth of a mesocoxa, densely, moderately coarsely punctate, setae slanting steeply. Venter with first ventrite mostly or entirely free from scales down middle in both sexes, punctate as metasternum, tumid in female, depressed or impressed in male; second ventrite free from scales at middle of base only; ventrites 3 and 4 punctate, setose and sometimes squamose from side to side; ventrite 5 densely punctate and setose, usually with scattered squamae. Length, 4-5.5 mm.; breadth, 2-3 mm.

Holotype male, Machanao, Nov. 25, 1936, Swezey ; allotype female, same locality, from Piper guahamense , June 4, Swezey ; and the following paratypes: 10 specimens with the same data as the allotype, three with same data but from "spiny amaranth", five with same data but from Ipomoea pes-caprae , two with same data but one labeled " ex Ipomoea sp. ", the other "on Amaranthus spinosus ", one taken at same locality in miscellaneous sweeping, June 2, Swezey ; four specimens, Dededo, from Ficus sp. (hodda), Aug. 7, Swezey , one from banana, the other from Ipomoea pes-caprae , one at same place, May 11, Usinger ; five, Yigo, from Terminalia , Nov. 13, Swezey ; two, Barrigada, from Piper , July 22, Swezey ; two, Upi Trail, May 5, one by Swezey from fence, one by Bryan; one, Talofofo, Nov. 18, Swezey ; four from " Island Guam ", Fullaway. The following specimens are from the National Museum : six, from Piper guahamense, Aug. 15, 1937, Oakley , no. 134, 37-26120; seven, from Vigna sinensis, Sept. 30, 1937, Oakley no. 155, 37-26126; one specimen taken by Fullaway .

The strongly convex, protuberant eyes will serve to distinguish this species fromitsally, T. convexa .

Figures

FIGURE 1.-0utlines of structures of Curculionidae: a, b, outlines of heads of (a) Trigonops convexa and (b) T. vulgaris, showing convexity of eyes; c, d, lateral outlines of aedeagus of (c) Microcryptorhynchus guamae and (d) M. premnae; e, f, dorsal outline of aedeagus of (e) M. premnae and (f) M. guamae; g, h, apices of mesotibiae of (g) Choerorrhi1wides flavisetosus and (h) C. marshalli.