AUSTUALIAX CERAPACIIYINI. 



221 



may be said to show an early stage in the development of the dich- 

 thadiigyne of the Dorylinit". 



The distribution of the 75 known species of Cerapachyinte is given 



in the following table: 



Sphinctomyrmex . 



Eusphinctus 



Nothosphinctus . . 



Zasphinctus 



Cerapachys 



Parasyscia 



Ooceraea 



Syscia 



Phyracaces 



Lioponera 



Total 



13 



C8 



as 



3 



o 

 c 



9 

 2 

 2 

 2 

 2 



9 



21 



c 

 to 



3 

 S. 



3 

 < 



1 



16 

 1 



28 



It will be seen that Australia has many more species than any other 

 region, that the genus Phyracaces is especially well represented and 

 that only four of the ten genera and subgenera are absent. One of 

 these, however, Cerapachys s. str., occurs in New Guinea and will 

 therefore probably be found in Northern Queensland. The present 

 center of distribution of the whole group, with 50 species, representing 

 all the genera except Sphincfo)uyrme.v, is seen to cover the Indo- 

 malayan, Papuan and Australian regions. That the group was once 

 cosmopolitan in range is shown by the survival of Sphinctomyrmex 

 stall in Brazil, Parasyscia augusta? Wheeler in Texas and P. tolteca 

 Forel in Guatemala and by the occurrence of two large primitive 

 Cerapachyine forms (Procrrapachys aunosus Wheeler and P. favosus 

 Wheeler) in the Baltic Amber. 



A difference of opinion has arisen between Emery and Forel in 

 regard to the status of Phyracaces, the former now regarding it as a 

 distinct genus, the latter as a subgenus of Cerapachys. While the 

 distinctive characters of Phyracaces, namely the less pronounced 



