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 



