Description. Male holotype. Length 1.6 mm, width 1.2 mm; body oval, elytron with side rounded, wider than pronotal base, widest at middle of elytra. Dorsal surface entirely shiny, lacking microsculpture. Color black with greenish tint (Fig. 201); head metallic green; pronotum and elytra with reflexed lateral margin reddish brown; antenna, epipleuron, legs yellow; mouthparts yellow except apical 1/4 of ultimate maxillary palpomere brown; ventral surface dark brown except abdomen yellowish brown. Head punctures large, separated by a diameter or less; pronotal punctures as large as on head, separated by a diameter or less; elytral punctures slightly larger than on pronotum, separated by less than twice a diameter; prosternal, mesosternal punctures large, separated by less than a diameter; metasternum with large punctures along anterior and lateral borders, punctures on remaining surface small, separated by a diameter or less; punctures on abdominal ventrites 1, 2 large, separated by less than twice a diameter, punctures on remaining ventrites small, separated by about a diameter. Head densely pubescent, frons widened from vertex to clypeus, slightly wider than width of eye measured at vertex (Fig. 202); eye canthus short; apical maxillary palpomere long, narrowed to apex in apical 1/3. Pronotum widest at middle, reflexed lateral margin widened, equal in width from base to apex. Epipleuron flat, wide in basal ½, as wide as pronotal hypomeron. Prosternum as wide as long, about as long as mesosternum, apical margin arcuate, slightly emarginate medially, without anterolateral projection. Postcoxal line on ventrite 1 short, angulate, extended slightly more than ½ distance to apical margin of ventrite. Apex of ventrite 5 truncate medially. Genitalia with basal lobe as long as paramere, slender, parallel sided from base nearly to apex, apex broadly emarginate; paramere slender, widest in basal 2/3, apical 1/ 3 narrower, slightly curved downward, dorsal margin with trace of blunt serrations medially (Fig. 203, 204); sipho robust, nearly equal in width throughout (Fig. 205).

Female. Similar to male except head not densely pubescent.

Variation. Length 1.5 to 1.6 mm, width 1.0 to 1.2 mm. See remarks below.

Type material. Holotype male; BELIZE: Cayo; Las Cuevas Research Station; 550m, 16 o 44.00N, 88 o 58.24W, V/3/2000 M. Caterino, BMNH(E), 2000–124, M. Caterino. (BMNH). Paratypes; 10, 7, COSTA RICA: Heredia Pr: La Selva Biol. Sta., 3 km S Pto. Viejo, 10 o 26'N 84 o 01'W, 8.vii.1993, H. A. Hespenheide, additional dates 9, 10, 12. vii.1993, Cecropia trunk; 1, 18.4, Cacao, Trece Aguas, Alta V.Paz, Guatemala, Schwarz Barber Coll; 1, San Juan Pubelo, Honduras, W M Mann Collector. (USNM).

Other specimens. 13. 6, COSTA RICA: Prov. Heredia, La Selva, 3 km S Pto. Viejo, 10 o 26'N 84 o 01'W, H. A. Hespenheide; 7, MEXICO: Veracruz, Est. Biol. de Los Tuxtlas, 18 o 35'N 95 o 05'W, H. A. Hespenheide. (USNM).

Remarks. Neaporia dianne is one of several species with a green tinted dorsal surface that is distinguished from similar species only by the structure of male genitalia. Of the specimens not considered types, those from Costa Rica are blue dorsally, rather than green, and specimens from Mexico, although green in dorsal color, have male genitalia with a paramere slightly different from those of the Costa Rican types.