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-9- 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 OligotiniOligota 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 MyllaeniniThe 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 |