North American Rypobiinae: Gloeosomatini

Gloeosoma Wollaston, 1854: 480 .

Type species: Gloeosoma velox Wollaston, 1854 (by monotypy).

Moronillus Jacquelin du Val, 1854: 38 . Type species: Moronillus ruficollis Jacquelin du Val, 1854 (by monotypy). Synonymized by Jacquelin du Val 1859: 234.

Lewisium Matthews, 1899: 164 . Type species: Lewisium ceylonicum Matthews, 1899 (designated by Lucas 1920). Synonymized by Bowestead 1999: 129.

Gronevus Casey, 1900: 64 . Type species: Gronevus sticticus Casey, 1900 (here designated). New synonymy.

Sahlberginus Bruce, 1948: 33 . Type species: Sahlberginus inexpectatus Bruce, 1948 (by monotypy). Synonymized by Bowestead 1999: 129.

Notes. Casey (1900) described five species of Gronevus and we examined two species to confirm the synonymy above resulting in the following new combinations: Gloeosoma sticticum (Casey), G. fuscicornis (Casey), G. truncatum (Casey), G. hesperum (Casey), G. laevis (Casey) .

The tribe Gloeosomatini Bowestead contains the genera: Gloeosoma Wollaston, 1854 and Catoptyx Matthews, 1887 . Gloeosoma can be distinguished from Oriental genus Catoptyx by the procoxal cavities elongate and the presence of a prosternal process, which is effaced in Catoptyx and also has the anterior margin of the pronotum emarginate and thickened ventrally.

Material Examined (USNM). United States: Gronevus sticticus Casey; Lectotype (not sexed, present designation) labelled ‘‘Ia [= Iowa], Casey bequest 1925, Type USNM 48398, sticticus, det Gloeosoma sticticum (Casey) by S. Bowestead’’. Gronevus hesperum: labelled, ‘‘Ia [=Iowa], Casey bequest 1925, hesperus 3, Paratype USNM 48396, det Gloeosoma hesperum (Casey) by S. Bowestead’ ’.