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-10- Brachypronomaea
Sawada. Four species in this genus have been described, one from Japan and
three from Madagascar. They are small, pale insects which can be
distinguished most easily by the unusual elytra with lateral fin-like
projections the outer edge of which is coarsely serrate. Myllaena
Erichson. This is a fairly large genus (over 50 species) of small dark
insects whose abdomen is pointed and the anterior margin of the head is
produced forward in the form of a beak. The senior author has collected a
large number of specimens of an unidentified species from a marine mud flat
at La Salina, Baja California Norte, Mexico. Actocharis
Fauvel. This genus is represented by a single species, A. marina Fauvel, from
Europe. It is said to be very rare under seaweed below high water mark
(Fowler, 1888). It is reddish testaceous and about 1.5 mm long. Its
systematic position has been much disputed, some students placing it in the Oxytelinae. Bryothinusa
Casey. Nine species have been described in this genus. They are all small,
slender, pale, parallel sided insects which live below high tide mark. One
species from California moves much more rapidly when exposed to daylight than
other reef dwelling staphylinids which are usually sluggish. The other eight
species are known from Japan and Hong Kong. The genus was reviewed by Moore
et al. (1973). Halorhadinus
Sawada. The two described species of this genus, from Japan, are very similar
to members of Bryothinusa but differ mainly in the longer ligula. Tribe
Diglottini
Diglotta Chapion. This is the only genus in the tribe. Nine species are known
from Europe, California, the Red Sea, Singapore and Celebes, all confined to
the seabeach. The maxillary palpi and labial palpi are exceptionally
elongate. The head is large, the pronotum is rapidly narrowed to the base and
the elytra are quite small, each wider than long, giving the insect its
characteristic appearance. Tribe
Bolitocharini
This is
a large tribe characterized by the tarsal formula, 4-4-5, with some of the
marine species variable in this regard. There are 13 marine genera but only
11 have been included in the following key. KEY TO GENERA OF MARINE BOLITOCHARINI I. Middle coxae separate .................................................
.................................................2 Middle coxae contiguous
.................................................
..............................................3 2. Body sparsely pubescent. .............................................................................Halmaeusa Body densely
pubescent.................................................
.................................... Corallis 3. Anterior and middle tibiae spinose. .................................................
...............................4 Anterior and
middle tibiae not spinose.
............................................................................5 4. Fifth tergite impressed at base; ligula simple.................
.....................................Phytosus Fifth tergite not impressed; ligula bifid. .................
...............................................Thinusa 5. Tergites not impressed at base. .................
............................... ................. .................6 At least three tergites impressed at base. .................
....................................................7 6. Mandibles without or with one internal tooth. .................
.......................... Liparocephalus Mandibles with numerous internal teeth.
................. ..................................... Baeostethus 7. Fifth tergite impressed at base .................
....................................................Amblopusa Fifth tergite not impressed.................
............................... .......... ............................... 8 8. Fourth tergite impressed at base .................
................................. ...............................9
Fourth tergite not impressed
at base................. ...............................
................. .........10 9. Head longitudinally impressed. .................
............................... ................. .....Bryobiota Head not longitudinally impressed. .................
............................... ................. ..Heterota 10. Metasternum long, hind and middle coxae distant; ligula
bifid........................Cameronium Metasternum short, hind and middle
coxae approximate; ligula simple...................Diaulota |