Megalographa, Lafontaine and Poole, 1991

Lafontaine, J. Donald & Sullivan, J. Bolling, 2009, A review of the genus Megalographa Lafontaine and Poole (Lepidoptera: Noctuidae: Plusiinae) with the description of a new species from Costa Rica, Insecta Mundi 2009 (77), pp. 1-10 : 2

Key to the species of Megalographa

1. Forewing with reniform spot partially outlined or partially filled with silvery white ................. 2

— Forewing with reniform spot partially outlined in pale ground color (pale gray or pale coppery brown) ........................................................................................................................................ 4

2(1). Forewing with central part of subterminal area and fringe unmarked; reniform spot represented by silvery-white oval with dark dot in basal third of oval; male vesica with apical cornutus ... .............................................................................................................. M. bonaerensis (Berg)

— Forewing with central part of subterminal area and fringe with contrasting dark patch; reniform spot partially outlined with silvery-white line; male vesica without apical cornutus .............. 3

3(2). Postmedial line of forewing slightly and evenly curved; male genitalia with clavus about 0.25- 0.50X as long as clasper; endemic to Talamanca Mountain Range of southern Costa Rica....... .............................................................................. M. talamanca Lafontaine and Sullivan

— Postmedial line of forewing often slightly S-curved, usually with a notch above silver stigma (between veins M3 and CuA1); male genitalia with clavus as long as clasper; widely distributed in New World from Canada to Argentina and in Hawaii (occasional in Great Britain) ............ ................................................................................................................ M. biloba (Stephens)