Cyclocephala bicolor

Key for identification of the species of the Cyclocephala bicolor group of the genus Cyclocephala

1. Anterior tarsi enlarged (males) ..................................................................................................................................... 2

- Anterior tarsi slender (females) .................................................................................................................................... 6

2. Second ventrite with a triangular, flat projection on posterior half; basal tooth of protibiae ( Fig. 29 View FIGURE 24 – 33 ) distinctly directed forward, separated from middle tooth by a distance about 2.0 times longer than that separating middle from anterior tooth; clypeus on apical half slightly convex in lateral view ( Fig. 12 View FIGURES 3 – 23 ) ....................... C. dichroa Dechambre.

- Second ventrite without triangular projection; basal tooth of protibiae ( Figs. 24, 26, 28, 31 View FIGURE 24 – 33 ) with anterior border usually perpendicular to longitudinal axis of tibiae and separated from the middle tooth by a distance 1.5 times or less than that separating middle from anterior tooth; clypeus on apical half more or less flat to slightly concave in lateral

view ( Figs. 4, 8, 16 View FIGURES 3 – 23 ) .................................................................................................................................................... 3 3. Frontoclypeal suture ( Fig. 15 View FIGURES 3 – 23 ) posteriorly projecting angularly; punctation on scutellum very fine, much more so than on middle of base of pronotum; punctation on apical region of pygidium very fine, distinctly finer than that of basal region, which is moderately fine ............................................................................................... C. anibali , sp. n.

- Frontoclypeal suture ( Figs. 3, 7, 11 View FIGURES 3 – 23 ) posteriorly projecting arcuately or almost straight; punctation of scutellum fine, scarcely finer than that on center of pronotal base; punctation on apical region of pygidium fine, scarcely smaller than that of basal region, which is strong to moderately strong .................................................................................. 4

4. Punctures on base of clypeus not discrete, closely set, mostly confluent, appearing as irregular and fine, more or less transversely striate; frontoclypeal suture posteriorly projecting arcuately ( Fig. 3 View FIGURES 3 – 23 ); surface of pygidium smooth ( 50X) ...................................................................................................................................................................................... 5

- Punctures on base of clypeus moderately strong, discrete, somewhat transverse, the distance between most punctures smaller than the diameter of puncture; frontoclypeal suture very slightly arcuately projecting posteriorly ( Fig. 7 View FIGURES 3 – 23 ); surface of pygidium finely alutaceous ( 50X) ........................................................................ C. bicolorata Endrödi

5. Labium ( Fig. 5 View FIGURES 3 – 23 ) with strong, dense piliferous punctures on basal two-thirds; metatibiae ( Figs. 49–50 View FIGURES 49 – 57 ) with piliferous punctures almost restricted to those of normal longitudinal series close to posterior border; distances between most punctures on apex of pygidium usually smaller than 2.0 times the diameter of punctures; apex of pygidium (in posterior view) feebly convex-truncate..................................................................................................... C . bicolor Laporte

- Labium with one longitudinal series of long bristles on each side, converging towards base; mesotibia and especially metatibiae with numerous piliferous punctures over all surface, in addition to those of normal longitudinal series; distances between most punctures on apex of pygidium usually 2.0 times or more larger than the diameter of punctures; apex of pygidium (in posterior view) rounded..................................................................... C. sarahae Ratcliffe

6. Basal tooth of protibiae distinctly anteriorly projected, separated from the middle tooth by a distance about 2.0 times larger than that separating the middle from the anterior ( Fig. 30 View FIGURE 24 – 33 ); clypeus convex in lateral view ( Fig. 12 View FIGURES 3 – 23 ) .................................................................................................................................................................... C . dichroa Dechambre

- Basal tooth of protibiae more diagonal and/or its anterior border more or less perpendicular to longitudinal axis of tibiae, separated from the middle tooth by a distance 1.5 or less than that separating the middle from the anterior ( Figs. 25, 27, 29, 32 View FIGURE 24 – 33 ); clypeus more or less flat in lateral view ( Figs. 4, 8, 16 View FIGURES 3 – 23 ) .......................................................... 7

7. Punctures on apical region of pygidium distinctly smaller than those of basal region. ...................... C. anibali sp. n.

- Punctures on apical region of pygidium scarcely smaller than those of basal region, which are strong to moderately strong ........................................................................................................................................................................... 8

8. Pygidium feebly convex in lateral view, surface smooth, punctures more or less strong almost to apex, on apical region somewhat smaller, usually dense, sometimes scattered ....................................................... C. bicolor Laporte

- Pygidium strongly convex in lateral view, surface finely alutaceous ( 50X), punctures more or less strong at base, smaller on apex, most distances between punctures 2.0 or more times larger than diameter of puncture. .................... .................................................................................................................................................... C. bicolorata Endrödi