The Microascaceae are briefly discussed and a key to the accepted genera is given. The new species described are Pithoascus langeronii with an arthric anamorph Arthrographis langeronii) and Petriellidium fimeti with a Graphium-like anamorph. Pure culture descriptions are given of the psychrophilic Leuconeurospora pulcherrima and also of Faurelina elongata which has an arthric anamorph with 2-celled conidia.