This third paper in a series about the dwarf galaxy populations in groups within the Local Supercluster concerns the intermediate mass ( 2.1 \cdot 10 ^ { 13 } M _ { \odot } ) NGC 5353/4 Group with a core dominated by S0 systems and a periphery of mostly spiral systems .
Dwarf galaxies are strongly concentrated toward the core .
The mass to light ratio M / L _ { R } = 105 ~ { } M _ { \odot } / L _ { \odot } is a factor 3 lower than for the two groups studied earlier in the series .
The properties of the group suggest it is much less dynamically evolved than those two groups of early type galaxies .
By comparison , the NGC 5353/4 Group lacks superluminous systems but has a large fraction of intermediate luminosity galaxies ; or equivalently , a luminosity function with a flatter faint end slope .
The luminosity function for the NGC 5353/4 Group should steepen as the intermediate luminosity galaxies merge .
Evidence for the ongoing collapse of the group is provided by the unusually large incidence of star formation activity in small galaxies with early morphological types .
The pattern in the distribution of galaxies with activity suggests a succession of infall events .
Residual gas in dwarfs that enter the group is used up in sputtering events .
The resolution of midlife crises is exhaustion .