10. 
i 
WHEELER: ANTS OF THE GENUS FORMICA. 397 
Petiole broad, its superior border rounded, entire or only slightly 
excised in the middle............ exsecta var. etrusca Emery. 
Petiole narrow, its superior border deeply excised in the middle .9 
Red or sordid yellowish red, posterior portion of head and a 
large spot on the pronotum brown.......... exsecta Nylander. 
Body paler red, vertex and pronotum each with a small brown 
STGE MN cae OMA cc ee es Rh. easecta var. rubens Forel. 
Gaster with a red spot at the. base. 
exsecta pressilabris var. rufomaculata Ruzsky. 
Gaster without:agted spot.at-the base! . .2n.. 2.4.0 ddanad..- 11 
Gaster, especially at the base, lustrous 
exsecta pressilabris Nylander. 
Base of gaster opaque, pubescence somewhat longer. 
exsecta pressilabris vars. foreli Emery 
and exsectopressilabris Forel. 
FUSCA GROUP. 
Workers. 
(Palwearerie rormis: SUNT EPO EL). EME Ooi Say tw We 2 
DCAM OCIG PTOE US tes 4 Se i ee ee) 15 
rill WitnoUG erect Mats? ae han ato R iw cmarn bee e 3 
Grlarwith erect airs! e OCRE tlds OPE Une ye 1 ae 13 
inody-opsque or subopagie. ... CTE gt ick Sema oko 4 
LOGVGN CST OF A RSS: CARE Anica ey ips Ahi ee ear Re ae ee OP 12 
Thorax black, like the head and gaster, in both large and small 
TIE) 2g Ras UE le CLR SU, | AST, cag RM SAO SR Oe GEE DA) 5 
Thorax, at least in the large workers, largely red.............. 7 
Body dull and opaque, rather coarsely shagreened. 
fusca var. japonica Motschulsky. 
Body subopaque, more finely shagreened................... 6 
Pubescence of gaster short, delicate, not silky... .. fusca Linné. 
Pubescence of gaster, long, silky; head, legs, scapes, and sutures 
of thorax reddish or yellowish... .fusca var. glebaria Nylander. 
Largest workers only with red thorax. . fusca var. rubescens Forel. 
Thorax rarely infuscated except in small workers............ 8 
Erect hairs lacking or very sparse; pubescence delicate and not 
very dense; red portions of body pale.................... 9 
Erect hairs more abundant; pubescence denser, red portions of 
body darker 
