Exophthalmus quadrivittatus

Male. Length 1.52–3.54 mm. Body oval to elongate, length/width ratio 2.52–2.67. Scales with multiple colours variously interspersed, forming distinct patterns; typically darker (brownish) dorsally on head, pronotum, and elytra, lighter (white to reddish brown) laterally, ventrally, and on legs. Rostrum rectangular in dorsal outline, dorsolateral margins subparallel, slightly widened at antennal insertion, anteriorly carinate, posteriorly convex; dorsal surface subplane, rugulose, with two obscure, anteriorly diverging carinae, median sulcus extending from antennal insertion to midpoint between eyes. Scrobe arcuate, extending to anterior margin of eye, glabrous. Antennae with scape extending to posterior margin of eye, covered exclusively with setae; funicular antennomeres progressing from elongate to equilateral, from clavate to cylindrical; club similar in length to funicular antennomeres IV–VII, nearly three times longer than width, dark brown. Eyes separated from anterolateral margin of pronotum by distance similar to horizontal diameter of eye, interocular distance similar to maximum width of eye. Pronotum equilateral to transverse, length/width ratio 0.79–0.89; in lateral view subquadrate to conical; scales evenly appressed, with two subparallel, slightly irregular stripes of white scales on each side along posterior two-thirds, slightly interrupted near midpoint. Elytra with greatest width at humeri or near central region; punctures narrowly separated; intervals subplane, intervals III/IV and VIII/IX covered with white scales interspersed with erect, longitudinally plicate, yellow scales forming characteristic yellow stripes, stripes merging at declivity, stripe of interval III/IV partially or entirely interrupted near anterior third. Wings with wing/body length ratio 1.14–1.22. Legs with protibial apex mucro shorter than tarsal claw, surpassed by 2–3 groups of reddish brown setae.

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