  Conventional descriptions of higher-spin fermionic gauge fields appear in two
varieties: the Aragone-Deser-Vasiliev frame-like formulation and the
Fang-Fronsdal metric-like formulation. We review, clarify and elaborate on some
essential features of these two. For frame-like free fermions in Anti-de Sitter
space, one can present a gauge-invariant Lagrangian description such that the
constraints on the field and the gauge parameters mimic their flat-space
counterparts. This simplifies the explicit demonstration of the equivalence of
the two formulations at the free level. We comment on the subtleties that may
arise in an interacting theory.
