LIST OF A SMALL COLLECTION OF ANTS PIERS 173 



also in No. 3 1 , two species living in the same nest, but in differ- 

 ent passages, beneath rock; North Brookfield. (The other 

 species in No. 31 is Myrmica scabrinodis.) 



Formica exsectoides Forel. — No. 1, without slaves; No. 3, 

 slave owners; No. 28, nests in hills,^ — may be a lighter variety 

 of Nos. 1 and 3 ; Pleasantfield. 



Formica fusca Linn. — No. 2, slaves; No. 8, black wood-ants; 

 No. 16, nest in rotten log; No. 25, nests beneath rocks, may be 

 same as No. 2; No. 29, nests beneath rocks; Pleasantfield. 



Formica ulkci Emery. — No. 5, slave-making ants, with well- 

 formed hills; No. 37, stones carried by No. 5 to top of ant-hill, 

 V/l ft. high, — "carried by one ant, it shows strength; by two, 

 intelligence"; Pleasantfield. 



Camponoius herculeanus Linn, subspecies ligniperda Latreille 

 variety noveboracensis Fitch. — No. 7, wood ants, keep Aphids; 

 Pleasantfield. 



