16 ZOOLOGICAL GEOGRAPHY. [part hi. 



most important of these are Agra (150 sp.), Ardistonus (44 sp.), 

 Schizogenius (25 sp.), Pelecium (24 sp.), Calophena (22 sp.), As- 

 pidoglossa (21 sp.), and Lia, Camptodonotus, Stenocrepis, and 

 Lachnophorus, with each more than 12 species. These are all 

 tropical ; but there are also a number of genera (26) peculiar to 

 Chili and South Temperate America. The most important of 

 these are Antardia (29 sp.), all except two or three confined to 

 South Temperate America ; Scelodontis (10 sp.), mostly Chilian ; 

 Feronomorpha (6 sp.) all Chilian ; and Tropidopterus (4 sp.), all 

 Chilian. Helluomorplia (18 sp.), is confined to North and South 

 America ; Galerita, Callida, and Tctragonoderus, are large genera 

 which are chiefly South American but with a few species scat- 

 tered over the other tropical regions. Casnonia and Lebia are 

 cosmopolite, but most abundant in South America. Pachyteles is 

 mostly South American but with a few species in West Africa ; 

 while Ldbodonotus has one species in South America and two in 

 Africa. 



Lucanidse. — The Neotropical species of this family almost all 

 belong to peculiar genera. Those common to other regions are 

 Syndesus, confined to Tropical South America and Australia, and 

 Platycerus which is Palsearctic and Nearctic, with one species in 

 Brazil, The most remarkable genus is undoubtedly Chiasogna- 

 thus, confined to Chili. These are large insects of metallic green 

 colours, and armed with enormous serrated mandibles. The 

 allied genera, Pholidohis and Splienognathus, inhabit Tropical 

 South America. Streptocerus confined to Chili, is interesting, as 

 being allied to the Australian Lamprima. The other genera 

 present no remarkable features ; but Sclerognathus and Leptino- 

 ptera are the most extensive. 



Cetoniidse. — These magnificent insects are but poorly repre- 

 sented in America ; the species being mostly of sombre colours. 

 There are 14 genera, 1 2 of which are peculiar. The most exten- 

 sive genus is Gymnetis, which, with its allies Cotinis and Allor- 

 hina, form a group which comprehends two-thirds of the Neotro- 

 pical species of the family. The only other genera of importance 

 are, Inca (7 sp.), remarkable for their large size, and being the 

 only American group in which horns are developed on the head ; 



