600 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Camponotus Mayr. 

 Key to Species. 



1. Clypeus with a distinct notch or impression in the middle of 



its anterior border fallax and its varieties 



Clypeus without such a notch or impression 2 



2. Head of worker major smooth and shining behind; color, 



at least in part, light red or yellow (castaneus) 3 



Head of worker major opaque or feebly shining behind; 

 color black, or black and dark red (herculeanus) 4 



3. Yellow or light red; gaster slightly darker (typical) castaneus 

 Head black or dark brown castaneus subspecies americanus 



4. Gaster opaque, with long, appressed pubescence 5 



Gaster shining, with short, sparse pubescence; thorax deep 



red herculeanus subspecies ligniperda var. noveboracensis 



5. Deep black throughout ...herculeanus subspecies pennsylvanicus 

 Legs, posterior portion of thorax, petiole, and base of gaster 



brownish red herculeanus pennsylvanicus var. ferrugineus 



C. fallax Nylander, var. ncarcticus Emery. 



Till recently this species has been cited in the literature as C 

 marginotus Latreille. Our American subspecies and varieties 

 nest in the hollow twigs of trees and bushes and attend aphids, 



Connecticut (Mayr) ; Colebrook (W. M. W.). 



C. castaneus Latreille. 



The typical form of this species is probably confined to the 

 lower, warmer, and southernmost portions of the State, as I have 

 seen no trace of it in the Litchfield Hills. It nests under stones 

 and logs in rather small colonies. 



Connecticut (Mayr, Coe) ; Westville (W. E. B.). 



C. castaneus americanus Mayr. 



Brookfield (E. L. Dickerson). 



C. herculeanus pennsylvanicus Degeer. Carpenter Ant. 



The common " carpenter ant," entirely black in color. It 

 nests usually in shady woods in old logs and stumps, whence it 

 may migrate into old farm-houses and suburban residences, and 

 become a pest, both by riddling the wood-work with its large 

 anastomosing galleries and Tby visiting the pantries and kitchens 

 for sweets. 



Connecticut (Mayr) ; Woodmont (P. L. B.) ; New Haven, 

 Branford (H. L. V.) ; Colebrook (W. M. W.). 



