Description. Male holotype. Length 1.2 mm, width 0.9 mm; body short, oval, elytron with side rounded, wider than pronotal base, widest at middle of elytra. Dorsal surface entirely shiny, lacking microsculpture. Color brown (Fig. 139); head black; pronotum dark brown with lateral 1/3 slightly paler brown; mouthparts and antenna yellow; legs yellow except anterior 1/3 of profemur, basal 1/4 of protibia brownish yellow; apical 2 abdominal ventrites yellow. Head punctures large, separated by less than a diameter; pronotal punctures about as large as on head, separated by a diameter or less; elytral punctures larger than on pronotum, separated by a diameter or less; prosternal, mesosternal punctures large, shallow, separated by less than a diameter; metasternum with few weakly impressed, large punctures along anterior and lateral borders, punctures on remaining surface small, nearly invisible; punctures on abdominal ventrites 1–2 large, separated by 1 to 3 times a diameter, punctures on remaining ventrites small, separated by about a diameter. Head not densely pubescent, frons narrow, about ½ width of eye measured at vertex (Fig. 141); eye canthus short; apical maxillary palpomere long, narrowed to apex in apical 1/3. Pronotum widest at middle, reflexed lateral margin narrow, equal in width from base to apex. Epipleuron flat, wide in basal ½, as wide as pronotal hypomeron. Prosternum longer than wide, longer than mesosternum, with apical margin arcuate, male without anterolateral projection. Postcoxal line on ventrite 1 long, abruptly angulate, extended to apical margin of ventrite (Fig. 140). Apex of ventrite 5 truncate. Genitalia with basal lobe longer than paramere, slender, evenly narrowed from base to blunt, emarginate apex; paramere slender, evenly narrowed in apical half to narrowly rounded apex in lateral view, dorsal margin without blunt serrations (Fig. 142, 143); sipho slender throughout, not apically narrowed (Fig.144).

Female. Unknown.

Variation. Unknown.

Type material. Holotype male; N.E. BOLIVIA: Xylopa sericea, Fogging, 3.vii.97, Tree 10B, Tray 5, Oquriquia forest, Tierra Prometida, J.G. Davies, BMNH(E), 1998–69. (BMNH).

Remarks. This tiny species is not easily distinguished from other brown or black species of Neaporia, but a lack of distinct, large prosternal and mesosternal punctures, abdominal ventrite 1 with long, angulate postcoxal line, and a narrow frons about ½ width of an eye serve to characterize N. margie.