Colaspis suilla, Fabricius, 1801

Riley, Edward G., 2020, A review of the Colaspis suilla species group, with description of three new species from Florida (Coleoptera: Chrysomelidae: Eumolpinae), Insecta Mundi 2020 (830), pp. 1-21 : 4-5

Key to species of the Colaspis suilla species group

1. Pronotum dark red without strong metallic reflection, contrasting with dark metallic elytra ( Fig. 9–10); primary intervals of elytral disc flat, only interval VIII and those at extreme elytral apex costate................................................................ C. thomasi Riley , n. sp.

— Pronotum metallic green or blackish-green, ranging to brownish with weak aeneous reflection ( Fig. 1–8); primary intervals of elytral disc with partially or completely developed costae............ 2

2(1). Dorsum unicolorous, entirely blackish-green, pronotal color not contrasting with color of elytra costae ( Fig. 5–6).......................................................... C. ansa Riley , n. sp.

— Dorsum multicolored, pronotal color contrasting with pale color of elytral costate ( Fig. 1–4, 7–8)... 3

3(2). Primary elytral costae well developed and pale throughout, nearly as wide as intervening strial areas ( Fig. 3–4); body of male more elongate (as in Fig. 3)......................... C. costipennis Crotch

— Primary elytral costae well developed or some unequally developed or incomplete, if all are well developed, then much narrower than intervening strial areas ( Fig. 1–2, 7–8); body of male shorter (as in Fig. 1, 7)............................................................................ 4

4(3). Costae of primary elytral intervals equally developed; elytral color generally pale or (rarely) suffuse with dark aeneous reflections; costae uniform in color, pale, not strongly contrasting with color of strial areas (most specimens) ( Fig. 1–2); apex of median lobe of male genitalia drawn-out, post-orificial length long ( Fig. 39); spermatheca bulbous distally, gradually tapering to duct connection (Fig. 47–48)............................................................... C. suilla Fabricius

— Costae on primary intervals unevenly developed; elytral color generally dark greenish with costae on intervals II and VIII (and rarely IV) pale, sharply contrasting in color with strial areas ( Fig. 7–8); apex of median lobe of male genitalia broadly rounded with distinct nodule, post-orificial length short ( Fig. 35); spermatheca uniformly narrow, cylindric, with abrupt duct connection (Fig. 52).................................................................... C. skelleyi Riley , n. sp.