Ten new species in three subgenera ofDicyrtomaare described from the Hawaiian Islands. Specimens were received from collections made on Hawaii, Maui, Kauai and Oahu. Species definitions are based on chaetotaxy of head, legs and the circumanal region. In addition, presence or absence of lateral spines (neosminthurid setae) on the parafurcular lobes may assist in grouping species within subgenera. Previous records of dicyrtomids from Hawaii include only one species,Ptenothrix(Papaairioides)daubia(Folsom). The following new species are described:Ptenothrix(Ptenothrix) hawaiicnaeis sp.n.,Ptenothrix(Papirioides)kauaiensissp.n.,P.(Papirioides)serratasp.n.,Dicyrtoma(Calvatomina)sylvestratilissp.n.,D.(Calvatomina)brevifibrasp.n.,D.(Calvatomina)tesselatasp.n., D. (Calvatomina)longidigitasp.n.,D.(Calvatomina)bellingerisp.n.,D.(Calvatomina)madestrissp.n., andD.(Calvatomina)microdentatasp.n.