AUSTRALIAN CERAPACHYINI. 223 



found a colony of about 25 workers of Ph. hinodis Forel in a small 

 cavity of a damp, red-rotten log. 



Nov. 10. I found several workers of Ph. scrutator sp. nov. foraging 

 under a stone in a dry depression at the base of the mountain at 

 Toowong, near Brisl)ane, Queensland. The ants moved rapidly and 

 seemed to be searching for the nests of other ants. 



Nov. 26. At Salisbury Court, near Uralla, New South Wales, I 

 saw a fine colony of Ph. senescens sp. nov. comprising about 150 

 workers running rapidly about on a hill-slope, very evidently on a 

 foraging expedition. They reminded me of the small forays of 

 Formica sanguinca in northern regions. 



Dec. 3. In the Bulli Pass, New South Wales I came upon a dozen 

 workers of Ph. ficosus sp. nov. running over the sand in a very loose 

 file. Three or four of them were carrying the naked puppe of some 

 small jMyrmicine ant in their jaws. 



These observations show that, as I maintained in the case of Para- 

 syscia augustoe, the Ccrapachyini form small colonies, like most spe- 

 cies of Ponerinse, that the species of Evsphinctus (with the probable 

 exception of »S. turneri) are hypogpeic in their habits, a peculiarity 

 also indicated by the absence of eyes in the workers of nearly all the 

 species and the small eyes of the females, and that the large-eyed 

 Phyracaces forage in troops (or as whole colonies?) on the surface of 

 the ground, their prey consisting of the brood of other ants. These 

 facts are very significant in connection with the affinities of the Ccra- 

 pachyini to the Dorylinpe, or driver ants, which in Africa and tropical 

 America, forage in a similar manner, though in much larger companies, 

 because their colonies are much more populous, and also feed on the 

 brood of other ants when other insect food is not available. Still, 

 what I have seen are only glimpses of the habits of the Ccrapachyini. 

 Any of my fellow entomologists in Australia who will undertake an 

 intensive study of these ants will, I am sure, find many new and 

 interesting ethological traits and solve many problems relating to the 

 character of the sexual phases, in addition to finding many new forms, 

 since practically every colony of Phyracaces I saw, during the limited 

 time at my disposal, represented a different, undescribed species. 

 In addition to the material collected by myself I have been able, 

 through the kindness of Mr. A.. M. Lea, to study the Cerapachyinse 

 of the Museum of South Australia, comprising specimens of Emphinc- 

 tvs steinheili and its var. hcdwiga;, Zasphmctus turneri, Phyracaces 

 heros, leae, rugulinodis and muUewanus. Mr. Henry Hacker of the 

 Queensland Museum has presented me with specimens of Eiusphinctus 

 hackeri and Syscia australis. 



