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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 |