138 illinois academy of science. 



Subfamily Myrmicin^. 



This subfamily is apparently the richest in number of genera, 

 there being eleven in my list, most of them, however, being repre- 

 sented by but a few species. 



Myrmecina sp. I have not taken this genus in Illinois, but find 

 it represented by one specimen in the collection of the State 

 Laboratory, taken on the University farm at Urbana in 1887. 



Monontorium. This genus is represented by two very common 

 species. 



M. pharaonis L., the little red house-ant. 



M. minimum Buckley, a small black ant found along roadsides 

 and in meadows. 



Solenopsis molest a Say, one of the smallest ants we have, the 

 tiny yellow ant found commonly in fields and sometimes in houses. 



Pheidole pilifcra Roger. 



P. vinclandica Forel. 



Of these two species the first is apparently much more widely 

 distributed in Illinois. P. vinclandica is found in sandy situations 

 especially. Both species are quite small, and have major workers 

 with enormously enlarged heads. 



Cremastogastcr lineolata Say is a common and very widely dis- 

 tributed species. It nests in fields under stones, in logs and 

 stumps, under bark, in hollow stems of weeds, etc. It seems to 

 be quite a variable species. I have one distinct variety so far, 

 C. lineolata hit esc ens Emery. 



C. rictima F. Smith. A few specimens of this species were 

 found in the Nason collection. 



Stenamma. One species of this genus. 



S. hrevicorne Mayr. 



Aphcenogaster. 



A. fulva Roger. 



A. fulva aquia Buckley. 



A. tcnnesseensis Mayr. 



The above two species and variety of Aphcenogaster are quite 

 common in timber. They are the slender, reddish ants found 

 under bark and in decaying wood. 



A. lamellidcns Mayr. I find this species represented in the State 

 Laboratory collection by one specimen, taken at Aurora, 111., in 

 1883. 



