Muiralyricen Metcalf, 1946, new genus

Head small, consisting almost entirely of the large compound eyes and the strongly elevated contiguous carinae; vertex small, deeply incised posteriorly; lateral carinae strongly elevated, contiguous. Frontal carinae contiguous to the level of the base of the antennae, then flaring to the wide clypeal border. Subantennal process large. Shoulder keels large, auriculate. Antennae with the basal segment minute, second segment flattened, ovate. Tegmina broad, costal cell broad with a recurved cross vein near the middle; a heavy straight cross vein extending from media across subcostal and radial cells to the costal margin; cubital vein ending in the extended claval vein.

Orthotype, Muiralyricen ruber, new species.

This genus would fall in Muir's key (18, p. 238) next to Paralyricen Muir, but differs in essential details of head structure and wing venation. It agrees with Paralyricen in having the frontal carinae contiguous and in having both shoulder keels and subantennal processes with the antennae short. The first segment is minute.