SLAVE-MAKING AXTS. 71 



who handed them over to the Rev. Dr. 

 M'Cook, who is interested in this family. 

 Dr. M'Oook gave me much valuable help, 

 but modestly disclaims ability to classify 

 and name. He says : 



"My own studies have been greatly in 

 your line, viz., the life habits. I have been 

 driven to give some attention to classifica- 

 tion by the same embarrassment which you 

 now feel. I found it impossible (in Amer- 

 ica) to get names. 7 ' 



So the ants were named by Dr. Auguste 

 Forel, of Munich, Germany, as follows : 



"The slave -maker Formica sail guinea, 

 Latr. var. F. sanguined amcricana. 



"The black slave Formica fusca, Lim. 



"The brown slave nurses of the com- 

 munity Formica schanfussii, Mayr. 



" The yellow slave also nurses F. sclian- 

 fttssii, var./owcee. 



"The small yellow ant, clinging to the 

 legs of the slave -maker Lasius Jiavus, De 

 Geer, American var. 



" The large ant, with black head Campo 

 wot us meleus, Say. 



" The slender brown ant, which could not 

 be made a tractable slave, is a new species, 

 and named by Dr. FoTQlApJiaenogaster Treati." 



I ara also indebted to Mr. S. H. Scudder 



