Mycterus, OF

KEY TO THE SPECIES OF MYCTERUS OF View in CoL View at ENA NORTH

AMERICA (ADULTS) (revised from Pollock (1993); includes only first three couplets)

1. Specimens from eastern North America, east of 100 th meridian..........................................2

1′. Specimens from western North America, west of 100 th meridian..........................................4

2. Dorsal body surface grey-black; male antennomeres 4–10 markedly produced laterally [ Fig. 5 View Figs ]; parameres [Fig. 11] acute apically; male sex patch conspicuously setose; Atlantic states and eastern Canada.................................. ....................................... M. scaber Haldeman

2′. Dorsal surface brown, with or without contrasting silver patches; male antennomeres 4–10 only slightly produced laterally ( Fig. 3 View Figs ); parameres rounded apically ( Fig. 5 View Figs ); male sex patch lacking setae ( Fig. 4 View Figs ); Wisconsin and Florida..................................................3

3. Dorsal surface uniformly brown, elytral vestiture without contrasting patches of silver setae; lateral pronotal margins only slightly sinuate, width across hind angles distinctly greater than width at midlength ( Fig. 1 View Figs ); known only from Wisconsin ( Iowa and Wood Counties) .............. ....................... M. youngi Pollock , new species

3′. Dorsal surface brown, with contrasting patches of silver setae; lateral pronotal margins distinctly sinuate, width across hind angles only slightly greater than width at midlength ( Fig. 2 View Figs ); known only from Florida ( Highlands County) ............................... M. marmoratus Pollock