Legs have heretofore been inseparable in the public mind from LYDIA
THOMPSON. Her successes have varied inversely as the length of her
trunk-hose. She has built up her reputation by "break-downs," and has
clutched the burlesque diadem with, innumerable bounds of her elastic
legs. Now, however, she has grown weary of offering up her fatted calves
at the shrine of a prodigal New-York audience, and desires to hide the
lightness of her legs under a bustle and crinoline. Wherefore she
exchanges her PIPPIN for a MOSQUITO, and appears in serious instead of
comic burlesque.

_Mosquito_ is a play written expressly for Miss THOMPSON, by DUMAS
_pere_. There is the more reason to believe this assertion, inasmuch as
DUMAS, or somebody else, has already written it expressly for a variety
of other people. It was written for MENKEN, under the title of "_The
Pirates of the Savannah_," some six years since, and was written for
somebody else and played at the Porte St. Martin about seventeen years
ago. We should not be surprised if the "Veteran Observer" of the _Times_
were prepared to prove that it was written expressly for him about the
year 1775. In view of these facts, no one will regard it as improbable
that it was also written for Miss THOMPSON. Be that as it may, however,
there is no doubt that Miss THOMPSON appeared in it on Monday evening
last, and that the following synopsis is much more accurate than even
the play itself.

After an overture, performed principally on an exasperating drum, the
curtain rises on a scene in a seaport town in South America, or, to be
exact, in Bolivia. Various disreputable pirates, whose appearance is a
libel on a profession adorned by such men as Captain EYRE and the
managers of cheap American republishing houses, conspire together in