On the heading of this blog:
Larvae are creatures in a process of becoming or development that have not yet actualized themselves in a specific form. This space is a space for the incubation of philosophical larvae that are yet without determinate positions or commitments but which are in a process of unfolding.
Presumably this means a larval subject is a subject where emphasis is placed on a subject becoming something determinate - the subject proper.
Is this a Deleuzian term? It does seem rather like the language he would use.