Maxill, deeply notched: caudal appendages, multi-articulated: filamentary appendages, none.
Maxill, with the edge square and straight: caudal appendages uniarticulate: filamentary appendages, none.
Maxill with two tufts of fine bristles, separated by larger spines: caudal appendages uniarticulate: filamentary appendages none.
At this early age, I may add, the filamentary appendages were not developed.
In all states, the filamentary appendages offer a good character.
