222 Journal New York Entomological Society. [Voi. xviii. 



forms. C. ncarcticus is the most abundant and with minutus usually 

 the only form to be found in the northern states and southern British 

 America. Though recorded from Florida it is certainly rare and 

 sporadic in that state. The pale rasilis. pazndits and discolor are, 

 on the other hand, the prevailing and most abundant forms in the 

 Gulf States. In the intermediate region, notably in the Mississippi 

 Valley and central Atlantic states, we find dccipiens, sitbbarbatus, 

 tanqiiaryi and pardus, which have an intermediate coloration. 



Since the various subspecies and varieties of fallax are based on 

 the stature, sculpture, pilosity and coloration of the major worker and 

 female, it is often difficult to identify single minor workers; and male 

 specimens, unaccompanied by workers or females, cannot, with cer- 

 tainty, be referred to their respective subspecies and varieties. As 

 an aid in identifying the major workers of the North American forms 

 that have been recognized up to the present time I subjoin the fol- 

 lowing table : 



1. Cheeks and clypeus with elongate, piligerous foveolse 8 



Cheeks and clypeus without such foveolje 2 



2. Body black, thorax at most only partially red, average length 6.5 mm. 



var. ncarcticus Emery. 

 Of a different color 3 



3. Both head and thorax reddish-brown or yellowish-red 6 



The head largely dark brown or black 4 



4. Average length 5.5 mm 5 



Average length 7 mm var. tanqiiaryi var. nov. 



5. Thorax dark red, head and gaster black var. minutus Emery. 



Thorax ivory yellow, spotted with brown, base of gaster often banded with 



yellow var. pardus var. nov. 



6. Average length 6-6.5 mm 7 



Average length 8 mm -. subsp. rasilis subsp. nov. 



7. Gaster yellow at the base var. paz'iclus var. nov. 



Gaster black throughout var. dccipiens Emery. 



8. Piligerous foveolse few on the cheeks, usually absent on the clypeus 9 



Both cheeks and clypeus with numerous piligerous foveolse 10 



9. Yellowish-brown, gaster paler, with brown bands, .subsp. siibbarbatiis Emery. 

 Brownish-black var. paiicipilis Emery. 



10. Head blackish-brown 11 



Head and thorax yellowish-red subsp. discolor Emery. 



11. Thorax blackish var. cnemidatus Emery. 



Thorax red var. claritliorax Emery. 



I. Camponotus fallax fallax Nyl. var. nearcticus Emery. 



C. marginatus Latr. var. nearcticus Emery, Zool Jahrb. Abth. f. Syst. VH, 



