Chairperson, Graduate Committee: Michael A. IvieSpiessberger, Erich LaraMichael A. Ivie was a co-author of the article, 'Revision of the West Indian Cyrtosoma perty (Coleoptera: Tenebrionidae: Cnodalonini), with descriptions of three new species' in the journal 'The coleopterists bulletin' which is contained within this thesis.Michael A. Ivie was a co-author of the article, 'A new genus and thirteen new species of Anopidiina (Tenebrionidae: Diaperinae: Gnathidiini) from the West Indies' submitted to the journal 'The coleopterists bulletin' which is contained within this thesis.2021-03-302021-03-302019https://scholarworks.montana.edu/handle/1/16205The West Indian Cyrtosoma are revised. Three species are described: Cyrtosoma dominicae Spiessberger and Ivie, new species from Dominica, Cyrtosoma luciae Spiessberger and Ivie, new species from Saint Lucia and Cyrtosoma vincenti Spiessberger and Ivie, new species from Saint Vincent. A key to the West Indian species is provided. Authorship of Cyrtosoma lherminierii (Guerin-Meneville) is clarified. Platydema picea Laporte and Brulle, 1831, is placed in Hesiodus Champion as Hesiodus piceus (Laporte and Brulle) new combination, a senior synonym of Hesiodus caraibus Fleutiaux and Salle new synonymy. A new genus of Anopidiina and thirteen new species are described from the West Indies. Prototyrtaeus Spiessberger and Ivie, new genus (type species Prototyrtaeus darlingtoni Spiessberger and Ivie, new species) is described from the Greater Antilles islands of Cuba, Jamaica, Hispaniola, and Puerto Rico, with 13 new species: Prototyrtaeus duartei Spiessberger and Ivie, new species; Prototyrtaeus neiba Spiessberger and Ivie, new species; Prototyrtaeus obrieni Spiessberger and Ivie, new species; Prototyrtaeus pecki Spiessberger and Ivie, new species; Prototyrtaeus gracilicornis Spiessberger and Ivie, new species; Prototyrtaeus howdeni Spiessberger and Ivie, new species; Prototyrtaeus sandersoni Spiessberger and Ivie, new species; Prototyrtaeus beckeri Spiessberger and Ivie, new species; Prototyrtaeus darlingtoni new species; Prototyrtaeus maestrensis Spiessberger and Ivie, new species; Prototyrtaeus felis Spiessberger and Ivie, new species; Prototyrtaeus turquinensis Spiessberger and Ivie, new species; Prototyrtaeus aureocornis Spiessberger and Ivie, new species. Wolcott's enigmatic single record of Byrrhidae for the West Indies hitherto is resolved as a misidentification of P. obrieni.enBeetlesBiologyGeneticsClassificationThesisCopyright 2019 by Erich Lara Spiessberger