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46 ZOOLOGICAL GEOGRAPHY. [part in.
are proportionally less developed in cold and temperate
climates. Our further examination will show how far this is
the case.
Lucanidas.—Only four genera are known in the sub-region.
Two are peculiar, Chiasognathus and Streptocerus, the former
allied to Tropical American, the latter to Australian genera ; the
other two genera are exclusively South American.
Cetoniidse.—These seem very scarce, only a few species of the
Neotropical genus Gymnetis reaching Patagonia.
Buprestidse.—These are rather numerous, many very beautiful
species being found in Chili. Nineteen genera are represented
in South Temperate America, and 5 of these are peculiar to it
3 others are South American genera ; 2 are Australian, and the
remainder are wide-spread, but all are found also in Tropical
America. The only north-temperate genus is Dicerca, and
even this occurs also in the Antilles, Brazil, and Peru. Of the
peculiar genera, the largest, Dactylozodes (26 sp.), has one species
in South Brazil, and is closely allied to Hyperantha, a genus of
Tropical America ; Epistomcntis is allied to Nascis, an Austra-
lian genus ; Tyndaris is close to Acmceodera, a genus of wide
range and preferring desert or dry countries. The other
two are single species of cosmopolitan affinities. On the
whole, therefore, the Buprestidse are unmistakeably Neotropical
in character.
Longicorns.—Almost the whole of the South Temperate Longi-
corns inhabit Chili, which is very rich in this beautiful tribe.
About 75 genera and 160 species are known, and nearly half
of the genera are peculiar. Many of the species are large and
handsome, rivalling in beauty those of the most favoured tropical
lands. Of the 8 genera of Prionidse 6 are peculiar, but all
are allied to Tropical American forms except Microplophorus,
which belongs to a group of genera spread over Australia, Europe,
and Mexico. The Cerambycidse are much more abundant, and
their affinities more interesting. Two (Syllittis and Pseudoce-
phalus) are common to Australia and Chili. Twenty-three are
Neotropical; and among these /6ic?io7z, Compsocerus, Callideriphus,
Trachyderes, and Xylocharis, are best represented. Twenty are