ABSTRACTTorrubiella ratticaudata sp. nov.is described from salticid spiders from the Solomon Islands. The anamorph of this fungus,Gibellula clavuliferavar.alba var. nov., produces ovoid conidia on phialides on penicilloid conidiophores and bacilliform conidia from polyblastic conidiogenous cells arising directly from the mycelium. Both teleo- and anamorphic states occur on spiders bearing a single, whip-like fungal stroma projecting from the tip of the host's abdomen.Gibellulais extended and emended to include species ofGranulomanus, which is regarded as a synonym ofGibellula.The different conditions under which morphologically distinct synanamorphs may reasonably be amalgamated in a single genus or should be retained in separate genera are discussed.Nomuraea atypicolaandGibellula pulchrawere also found on the spiders; no teleomorphic state for either of these species was present.