BIOLOGICAL PAPERS. l-tl 



Polyergus nifescens hreviceps Emery. I have one vial of this 

 slave-making ant, taken with its slave, F. suhsericca, at Wyoming, 

 111., by G. E. Sanders. 



Campanotiis. I have nine species of this genus. 



C. castaneus Latr. 



C. castaneus americanus Mayr. 



C. herculanus pennsylvanicus De Geer. 



C. herculanus ferrugineus Fabr. 



The two preceding species are our common carpenter ants. 



C. ligniperdis novehoracensis Fitch. 



C. fallax minutus Emery. 



C. fallax subbarbatus paucipilis Emery. 



C. fallax tanquaryi Wheeler. 



C. (subgenus) Colobopsis sp. 



The following species were added to my list by Prof. W. M. 

 Wheeler. 



Pheidole bicarinata Mayr. (The type locahty of this species is 

 "Illinois.") 



Aphcsnogaster fitha aquia var. ntdis Emery. Rockford, 111. 

 (W. M. W.) 



A. fulva aquia var. picca Emery, Rockford, 111. (W. M. W.) 



DoUchoderus {Hypoclinea) plagiatus ^layr. The type locality 

 is •Tllinois." I have taken it at Rockford, III (W. M. W.) 



Doryniyrmex pryamicus Roger var. niger Pergande. Rock- 

 ford, ill. ' (W. ^I. W.) 



Preuopelis parvuhyiayv. Rockford, 111. (W. M. W.) 



Lasius flavus L. subsp. nearcticus Wheeler. Rockford, 111. 

 (W. M.W.) 



L. (Acanthomyops) claviger Roger subsp. subglaber Emery. 

 Rockford, 111. (W. M.W.) 



Formica pallide-fulva Latr. subsp. fuscata Emery. Rockford, 

 111. (W. M.W.) 



F. fusca L. var. subccnescens Emery. Rockford, 111. 

 (W. M. W.) 



F. subpolita Mayr var near pcrpilosa Wheeler. Rockford, 111. 

 (W. M.W.) 



Polyergus lucidus ^Siayr. Rockford, 111. (W. M. W.) 



P. rufescciis Latr. subsp. bicolor Wasmann. Rockford, 111. 

 (W. M.W.) 



I take it that there are probably people in various parts of 

 the state who are doing ecological work or perhaps merely making 



