Maypa Blanchard, 1850: 115

Smith, Andrew B. T., 2008, South American Melolonthinae (Coleoptera: Scarabaeidae) classification and nomenclature: some problems and solutions, Insecta Mundi 2008 (60), pp. 1-28 : 6

Synonym. Maypa Blanchard, 1850: 115 . Type species Maypa chlorosticta Blanchard , by monotypy.

Synonym. Haplodema Harold, 1869a: 1136 (new synonym, unjustified emendation of Aplodema Blanchard ). Type species Brachyphylla magellanica Blanchard , subsequent designation ( Evans 2003: 58).

Synonym. Apterodema Fairmaire, 1884: 490 . Type species Apterodema acuticollis Fairmaire , by monotypy.

Synonym. Paralistronyx Brenske, 1906: 30 . Type species Listronyx livida Germain , by original designation.

Synonym. Paramaypa Brenske, 1906: 30 . Type species Macrosoma osornoana Brenske , by original designation.

Diagnosis. Sericoides is distinguished from other Melolonthinae using the following combination of characters: Labrum protruding well beyond clypeus in dorsal view, labrum oriented roughly parallel to clypeus, clypeal margin reflexed; antenna with 9 antennomeres (including 3-5 antennomere club); mesosternal / metasternal process absent; abdomen with 6 ventral sternites (basal sternite partially hidden by metacoxae), sternites approximately equal in length and evenly convex; males and females with protarsomeres 1-4 not modified into cup-like pads; metatibiae with 2 apical spurs, spurs set below and above the tarsal articulation (tarsus moves between tibial spurs); all claws symmetrical, apically toothed.

Remark. Sericoides magellanica , the type species of the genus-group names Aplodema and Haplodema , is here transferred to the genus Sericoides . This places these generic names in synonymy with Sericoides being the senior synonym. Although the genus Sericoides was divided into subgenera, these groupings are paraphyletic assemblages and therefore have little value. I consider all of the genus-group names above to be junior synonyms of Sericoides pending the completion of a monographic revision of this group that I currently have under way. The only species discussed below is Sericoides magellanica , because of the generic ramifications.