WHEELER, NORTH AMERICAN ANTS 399 



Antennal scapes flatteued at the base; tibiae with long oblique 



hairs 26 



22. Head, thorax and petiole subopaque, ferruginous brown ; scapes 



without short, erect hairs. . (13) viaculatus tortuganus Emery, 

 Thorax shining, wholly or in part clay yellow ; scapes with short, 



erect hairs 23 



23. Mandibles 7-toothed. Length, 8-10 mm 24 



Mandibles 5- to 6-toothed. Length, 12-14 mm. (17) vafer sp. nov. 



24. Head pale yellow, not infuscated behind (15) fumidus var. 



fragilis Pergande. 

 Head brownish, vertex of head infuscated or black 25 



25. Occipital border of head yellow or brown (14) fumidus var. 



festinatus Buckley. 



Whole dorsal surface of head dark brown or black (16) 



fumidus var. spurcus var. nov. 



26. Head entirely ferruginous red; cheeks with small foveolpe, with- 



out erect hairs (23) ahdotninalis.floridarius Buckley. 



Vertex of head dark brown or black, cheeks with deep, elongated 



foveolse and erect hairs (24) abdominalis transvectus 



sub. sp. nov. 



27. Small species, not more than 6 mm. long ; head rugose in front. 



(52) bruesi sp. nov. 

 Large species, at least 8-9 mm. long ; head never rugose in front . . 28 



28. Antennal scapes, with short erect hairs, body shining, black. . (25) 



IxEvigatus Smith. 

 Antennal scapes without erect hairs 29 



29. Head small (3.2 x 2.8 mm.) ; body shining; mandibles 6- to 7- 



toothed 30 



Head large (3.4 x 3.4 mm.) ; the head and thorax at least opaque 

 or subopaque ; mandibles 5-tdothed 31 



30. Body entirely yellow or reddish yellow (21) castaneus Latr. 



The head at least dark brown or black (22) castaneus 



americanus Mayr. 



31. Gaster opaque or subopaque ". 32 



Gaster shining 36 



32. Pubescence on gaster short 33 



Pubescence on gaster very long 35 



33. Sculpture coarse ; hairs and pubescence golden yellow 34 



Sculpture finer; hairs and pubescence pale yellow or white. .(29) 



lierculeanus pennsylvanicus var. malixcan var. nov. 



34. Posterior portion of thorax red. .(26) lierculeanus var.' ivhymperi 



Forel. 

 Whole thorax black (27) lierculeanus var. modoc var. nov. 



35. Thorax, petiole, gaster and usually also the legs black ; pubescence 



pale yellow or white (28) lierculeanus pennsylvanicus 



De Geer. 

 Posterior portion of thorax, petiole, legs and base of gaster red- 

 dish yellow ; pubescence and pilosity golden yellow (30) 



lierculeanus pennsylvanicus var. ferruyiheus Fabricius. 



