24. 
25. 
26. 
ae. 
28. 
29. 
30. 
ol. 
32. 
33. 
WHEELER: ANTS OF THE GENUS FORMICA. 399 
Length 3.5-6 mm.; gaster somewhat bronzy, slightly shining, 
with shorter pubescence...... rufibarbis var. gnava Buckley. 
Thorax.entirely black... 5... fusca var. subaenescens Emery. 
PG ete NOM OT, WEE er cs Fahy, ainder toe’ diveuy ba myaca, n° dni baaapal 6: avel eyetes 25 
Thorax clear, yellowish red throughout. 
fusca var. neorufibarbis Emery. 
Thorax of large workers infuscated or black anteriorly. 
fusca var. gelida, var. nov. 
Body opaque or subopaque, head of largest workers not rec- 
Tere PUI SOP Se eae ea os sie whe he eke .28 
Body shining, head of largest workers rectangular............ 27 
Thorax brownish red or dark chestnut...... subpolita Mayr. 
Thorax yellow or yellowish brown, head of largest workers with 
more nearly parallel sides. 
subpolita var. camponoticeps, var. nov. 
Antennal scapes with erect hairs, eyes densely hairy. 
cinerea pilicornis Emery. 
Antennal scapes without erect hairs, eyes not hairy.......... 29 
Erect hairs abundant on head and thorax; length 3.5-6 mm.. .30 
Erect hairs very sparse on head and thorax; length 5-6.5 mm. 
sibylla, sp. nov. 
Petiole broad, seen from behind cordate, notched in the middle. 
cinerea var. altipetens, var. nov. 
Petiole narrower, with blunt margin, usually entire or obtusely 
Peis IER SoG) WCE) Nate Oh GN wig a Ss was sed tea ceg aes 32 
Suberect hairs absent on sides of head and flexor surfaces of legs. 
33 
Suberect hairs present on sides of head and flexor surfaces of legs. 
cinerea var. lepida, var. nov. 
Body dark brownish, top of head and gaster blackish. 
cinerea var. neocinerea Wheeler. 
“Body light yellowish red, top of head, pronotum, and gaster 
DEE ys no hss a Ee cinerea var. rutilans, var. nov. 
SUBGENUS PROFORMICA. 
Workers. 
HELE EERO 0G Ma) cv Tc ital S10 SS 8 Oe cs ee aD 2 
erate eRe ee ye oN ci he Ma 8 8 
