46 
ZOOLOGICAL GEOGRAPHY. 
[part III, 
are proportionally less developed in cold and temperate 
climates. Our further examination will show how far this is 
the case. 
Lucankke. — 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. 
Cetoniidae. — 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 ; JSpistomcntis 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 Microplophoms, 
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 ( Syllitus and Pseudoce- 
phalus ) are common to Australia and Chili. Twenty-three are 
Neotropical; and among these Ibidion, Compsocerus, Callideriphus , 
Trachyderes , and Xylocharis, are best represented. Twenty are 
