KEY TO THE SPECIES OF PROTOTYRTAEUS

1. Antenna with 7 antennomeres (Figs. 15g –i), club composed of 3 fused antennomeres; Jamaica ............................................ 2

1ʹ. Antenna with 9 antennomeres (Figs. 15a–f, j–n), club composed of 3 distinctly divided antennomeres; Cuba, Hispaniola, and Puerto Rico ................................................. 4

2. Elytron with a weak longitudinal elevation along elytral suture (Fig. 9), only 1 long seta above lateral groove of elytra on basal fourth (if missing, distinct puncture present) (Fig. 16c); lateral pronotal margin above lateral bead, in dorsal view, sinuate on posterior third (Fig. 9) ........................................ ........... P. beckeri Spiessberger and Ivie, new species

2ʹ. Elytron lacking elevation along elytral suture (Figs. 7, 8), more than 1 long seta above lateral groove of elytra (if missing, distinct punctures are present) (Figs. 16a, b); lateral pronotal margins above lateral bead in posterior third nearly straight (Figs. 7, 8) ........................ 3

3. Body size small, length 1.3–2.0 mm (Fig. 8); strongly convex, rounded, posteriorly more declivous in lateral view (Fig. 16b); frons sparsely punctate, clypeus with few setae, mostly apico-laterally; antenna as in Fig. 15h; aedeagus as in Fig. 17g .......................... ...... P. sandersoni Spiessberger and Ivie, new species

3ʹ. Body size large, length 2.4–3.3 mm (Fig. 7); convex, more attenuate posteriorly, less declivous in lateral view (Fig. 16a); frons moderately punctate, clypeus with complete row of setae across apex; antenna as in Fig. 15g; aedeagus as in Fig. 17f ................... .......... P. howdeni Spiessberger and Ivie, new species

4. Dorsal surface usually metallic green, blue to purple; elytron usually punctato-striate; pronotum widest at middle, anterior margin without bead (Figs. 10–14); Cuba .......... 5

4ʹ. Dorsal surface not or occasionally weakly metallic; elytron impunctate or with punctures confusedly distributed; pronotum widest at base, anterior margin beaded or not (Figs. 1–6); Hispaniola and Puerto Rico .... ....................................................... 9

5. Large species, 3.5–4.0 mm long (Fig. 10); protibia sometimes ventrally glabrous between raised weak carinae on apical half; mesotarsomere 1 weakly to distinctly larger than 2 (Fig. 16d); antenna as in Fig. 15j; aedeagus as in Fig. 17i .......................... ...... P. darlingtoni Spiessberger and Ivie, new species

5ʹ. Smaller species, 2.3–2.8 mm long; protibia cylindrical, ventrally setose on apical half; mesotarsomere 1 only slightly larger than 2 (Fig. 16e) .......................................... 6

6. Antenna unicolored (Figs. 12, 14); antennomere 4 wider than long (Figs. 15l, n); head with punctures variable in size .............. 7

6ʹ. Antenna weakly bicolored, antennomeres 1–8 dark, apex of 9 pale (Figs. 11, 13); antennomere 4 subquadrate or longer than wide (Figs. 15k, m); head with punctures subequal in size to eye facet ................. 8

7. Metanepisternum impunctate; head finely punctate, frons with punctures becoming sparser posteriorly; antenna as in Fig. 15l; habitus as in Fig. 12 .............................. ............... P. felis Spiessberger and Ivie, new species

7ʹ. Metanepisternum with line of strong punctures; head coarsely punctate, frons with punctures evenly distributed; antenna as in Fig. 15n; habitus as in Fig. 14 ................. ... P. auranticornis Spiessberger and Ivie, new species

8. Antennomeres 1–8 black, 9 with yellow apex; antennomere 3 distinctly longer than 2, 4 longer than wide (Fig. 15k); frons glabrous, punctures evenly distributed; pronotum coarsely punctate; aedeagus as in Fig. 17j; habitus as in Fig. 11 .............................. ..... P. maestrensis Spiessberger and Ivie, new species

8ʹ. Antennomeres 1–8 dark yellow or brown, 9 yellowish at apex; antennomere 3 slightly longer than 2, 4 subquadrate (Fig. 15m); frons bearing long setae, punctures becoming sparser posteriorly; pronotum finely to moderately punctate; aedeagus unknown; habitus as in Fig. 13 ................................ .. P. turquinensis Spiessberger and Ivie, new species

9. Antenna bicolored from antennomere 5; intercoxal process of ventrite 1 broadly rounded between metacoxae (Fig. 16g); pronotum moderately transverse (Fig. 1); antenna as in Fig. 15a; aedeagus as in Fig. 17a; habitus as in Fig. 1; Hispaniola ......... ........... P. duartei Spiessberger and Ivie, new species

9ʹ. Antenna unicolored, sometimes paler apically; intercoxal process of ventrite 1 between metacoxae acute (Figs. 16i, j), narrowly (Fig. 16h) or moderately rounded (Fig. 16k); pronotum strongly transverse (Figs. 2–6); Hispaniola and Puerto Rico ....................... 10

10. Anterior pronotal angles weakly projecting, somewhat acute; frons with confluent punctures, forming strigulae (more evident under LED white light); intercoxal process of ventrite 1 moderately rounded (Fig. 16k); antennomere 3 distinctly longer than 2 (Fig. 15f); integument always shiny; aedeagus with basale twice as long as apicale (Fig. 17e); habitus as in Fig. 6; Luquillo Forest, Puerto Rico .................... P. gracilicornis Spiessberger and Ivie, new species

10ʹ. Anterior pronotal angles rounded; frons without confluent punctures; intercoxal process of ventrite 1 acute (Figs. 16i, j) or narrowly rounded (Fig. 16h); antennomere 3 subequal to 2 (Figs. 15b–e); integument shiny or matte; aedeagus with basale subequal to apicale (Figs. 17b–d; unknown in P. unomas); Hispaniola and Puerto Rico .................................. 11

11. Anterior pronotal margin lacking bead or bead incomplete medially; antenna dark brown, sometimes paler towards apex; head width usually subequal to anterior margin of pronotum (Figs. 2, 3); Hispaniola .............. 12

11ʹ. Anterior pronotal marginal bead complete; antenna red, yellow, or light brown; head narrower than anterior pronotal margin (Figs. 4, 5); Puerto Rico ............................. 13

12. Metanepisternum not distinctly separated from metaventrite; metaventrite weakly punctate to impunctate; antenna dark brown, sometimes lighter towards apex; body less convex in lateral view, more elongate, somewhat acute behind in dorsal view (Fig. 2); aedeagus with median lobe projecting ventrally from apicale (Fig. 17b); antenna as in Fig. 15b; Sierra de Neiba, Hispaniola .... .............. P. neiba Spiessberger and Ivie, new species

12ʹ. Metanepisternum distinctly separated from metaventrite; metaventrite strongly punctate; antenna dark brown; body more convex in lateral view, rounded behind in dorsal view (Fig. 3); antenna as in Fig. 15c; Cordillera Central, Hispaniola ................................ .......... P. unomas Spiessberger and Ivie, new species

13. Lateral area of metaventrite smooth or weakly punctate; aedeagus elongate and narrow, apicale converging at apical third and narrowed at apex (Fig. 17c); integument matte or shiny, microsculpture present on dorsal part (more nitid on matte forms); antenna red or yellow; habitus as in Fig. 4; Puerto Rico, widespread ......................... ........... P. obrieni Spiessberger and Ivie, new species

13ʹ. Lateral area of metaventrite strongly punctate; aedeagus short and wide, apex rounded, converging at apical fourth (Fig. 17d); integument shiny, weakly microsculptured dorsally; antenna yellow; habitus as in Fig. 5; Aguas Buenas, Puerto Rico ..................... .............. P. pecki Spiessberger and Ivie, new species