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One species of Glenoplectus Sawada and one species of Diaulota, both from Japan, have all the tarsi 4-segmented. They go to Diglottini in this key but are placed in Bolitocharini. They lack the basal narrowing of the pronotum which is so characteristic of Diglottini.

The condition of the outer lobe of the maxilla is not known in Polypea Fauvel, so it cannot be placed in this key. A single species has been described from a coral reef from Aru in the South Pacific.

Tribe Oligotini

Oligota Mannerheim. This is a fairly large genus of very small insects whose members prey on mites. One species, O. pusillima Gravenhorst, is reported by Fowler (1888) from England as being found in 'haystack refuse, decaying sea-weed, etc.'

Tribe Myllaenini

The inner and outer lobes of the maxilla are entirely corneous in members of this tribe, a character not shared with any other staphylinids. The outer lobe is without spines or setae, hooked and pointed at tip. The inner lobe is also hooked and pointed but is provided with a row of various spines and teeth on the inner edge. In other staphylinids both lobes usually have dense tufts of setae on the inner edge. It is often necessary to prepare slide mounts of the mouthparts to determine their condition.

KEY TO GENERA OF MYLLAENINI

I. Elytron with a fin-like projection at the side. ...........................................Brachypronomaea

Elytron without projection at the side................................................. ..............................2

2. Head produced in front in the form of a beak. .....................................................Myllaena

Head not produced in a beak ................................................. .......................................3

3. Ligula bifid. ................................................ ...................................................Actocharis

Ligula simple. ................................................. ............................................................4

4. Ligula very short, inconspicuous. ................................................ ..................Bryothinusa

Ligula more than half as long as first segment of labial palpus.............................Halorhadinus