Key to the Known Species of Beltia Jacoby

1. Profemur armed (Fig. 9, 10)..................................................... 2 — Profemur unarmed............................................................ 4

2(1). Profemur with a large quadrate tooth (Fig. 9)................ B. nicaraguensis Jacoby — Profemur with a small acute tooth (Fig. 10)........................................ 3

3(2). Known from Costa Rica and Panama ............. B. tisingalita Flowers, new species — Known from South America................................ B. weyrauchi (Bechynĕ)

4(1). Median lobe of aedeagus with strong lateral flanges, giving the en-face view an “arrowhead” shape (Fig. 13)............................................................. 5

— Median lobe of aedeagus with shape different from above............................ 9

5(4). Pronotum of male strongly transverse (Fig. 11), that of female trapezoidal; entire dorsum deep metallic purple................................ B. angustomarginata (Bechynĕ)

— Pronotum of both sexes trapezoidal (Fig. 12); purple color, if present, confined to elytra.... 6

6(5). Head, body, femora, and tibiae with various combinations of metallic colors; tarsi reddish brown; antennae tan, with only segments 10 and 11 darkened...... B. chiriquensis (Jacoby)

— Antennae with at least apical three segments darkened, or entire antenna yellow; if tarsi tan or brown, then at least apex of tibiae of similar color.............................. 7

7(6). Known from Peru east of the Andes; apical segment of female abdomen with a pair of small tubercles (Fig. 14)..................................... B. placidula (Bechynĕ)

— Known from west of the Pacific coastal areas of Colombia and Lower Central America; female abdomen lacking tubercles................................................... 8

8(7). Upper surface highly polished and shining, legs dark metallic blue or purple; known from western Colombia ............................. B. gorgona Flowers, new species

— Upper surface blue or olive green, not highly polished; pronotum densely punctate, with conspicuous punctulae between main punctures (as in Fig. 31); legs dark reddish brown; known from southeastern Costa Rica and western Panama B. osa Flowers, new species

9(4). Intercoxal process of prosternum distinctly emarginate, with lateral angles prominent (Fig. 15)...................................................................... 10

— Intercoxal process of prosternum truncate or at most shallowly emarginate............ 14

10(9). Endophallus of aedeagus with a large twisted subapical sclerotized bar and apical fields of spicules (Fig. 48b); known from Ecuador west of the Andes.. B. ledesmae Flowers, new species

— Endophallus lacking above combination of characters.............................. 11

11(10). Smaller (<6 mm)............................................................ 12 — Larger (≥ 6 mm)............................................................. 13

12(11). Antenna entirely testaceous. Aedeagus with basal hood and median lobe subequal in length; apex of median lobe tapering to a point (Fig. 45a); known from Amazonian Peru ......................................... B. confusa Flowers, new species

— Antenna testaceous, with the two apical segments black. Aedeagus with basal hood almost twice the length of median lobe; apex of median lobe sinuate, with a central projection (Fig. 55a); known from Amazonian Ecuador ............. B. talaga Flowers, new species

13(11). Anterior angles of pronotum directed forward, visible in dorsal view (Fig. 16); known from the Amazon Basin of Ecuador and northeastern Peru .. B. napoensis Flowers, new species

— Anterior angles of pronotum not directed forward nor visible when viewed from directly above the head; large body size (≥ 9 mm); size of punctures on pronotum subequal to those of elytra; known from the western slope of the Ecuadorian Andes... B. tsachila Flowers, new species

14(9). Elytra strongly and rugosely punctate (Fig. 33)......... B. rugosa Flowers, new species — Elytra smooth, or moderately or finely punctate................................... 15

15(14). Meso- and metathorax entirely yellowish brown beneath; dorsal color metallic green................................................... B. tilarana Flowers, new species

— Thorax beneath dark metallic, at least in part; dorsal color various................... 16

16(15). Head, body, legs, and apical half of antennae shining dark blue.................................................................... B. vacilona Flowers, new species

— Other colors present; if largely dark blue, at least tarsi and/or the majority of antennomeres brown or tan.............................................................. 17

17(16). Legs entirely reddish brown; male with transverse patch of dense short setae on abdominal sterna IV and V (Fig. 17)........................ B. herreri Flowers, new species

— Legs dark metallic, at least on femora; males with setae similar on abdominal sterna III–VI......................................................................... 18

18(17). Endophallus of aedeagus with a twisted subapical sclerotized bar and apical fields of spicules (Fig. 43b); sides of pronotum shallowly curved (Fig. 19); known from western Ecuador ..................................... B. awapita Flowers, new species

— Endophallus lacking subapical structures; sides of pronotum strongly curved (Fig. 34); known from Costa Rica ............................ B. sanchezae Flowers, new species