Labicerus Erichson, 1838

Genus Labicerus Erichson View in CoL in Schomburgk, 1848

Type species. Labicerus elegans Erichson in Schomburgk, 1848 by monotypy.

Diagnosis. Head in lateral view semicircularly rounded, projected in front of eye for less than width of eye (longest axis). Antennae elongate, longer than frons, and bearing an elongated projection; pedicle flattened. Wings with MP branching from ScP+R in proximal third of wing; ScP forked from RA near wing midlength.

Remarks. Labicerus ( Figs. 1 View Fig , 2 View Fig ) appears to be superficially most similar to Platonax ( Fig. 3 View Fig ), including the general shape of the head ( Figs. 5D, F View Fig ) and the general coloration of the body and wings, but that genus lacks the appendage on the antennae. Platonax also appears to have distinctly broader antennae than Labicerus . Among genera with an antennal appendage Apache , Otiocerus , and Shellenius ( Figs. 5B, E, H View Fig ) all have a much more strongly projected head, and Kubilaya has the leading margin of the wing scalloped and a pair of large tubercles on the thorax (Fennah 1945, 1952 as Iquitosa Fennah ).

Etymology. The genusnameis derived from the Greek terms “ laví ” (λαβή, handle), combined with “ kéras” (κέρας, horn, antenna), and is masculine in gender (Dmitriev, 2002).