392 
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BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Petiole narrow and very low, its border very blunt and not 
produced upward in the middle......... ferocula, sp. nov. 
Petiole broader and higher, its border sharp, more or less pro- 
ducedtipward im tne marcddle!? 20°. Pe ae 19 
Erect hairs absent on gula and upper surface of head and thorax. 
20 
Erect hairs present on gula and upper surface of head and thorax. 
yi 
small forms (4-oms mime! See, criniventris Wheeler. 
Larver Tomes 4-9 vm Poe OS ee Pe a 
Gaster black, somewhat shining, with short, sparse pubescence. 
truncicola integra Nylander. 
Gaster dark brown, opaque, densely gray pubescent. 
truncicola integroides Emery var. haemorrhoidalis Emery. 
Hiyesnairkesse Gwe ee 2 Oe ys 
yest PI echt ee ow ale aber nie wate lal alae ee 26 
Erect hairs on gaster very numerous, very short and stubby... 24 
Erect hairs on gaster less numerous, longer................. 25 
Gaster blackish erownrers OS SUSE comata Wheeler. 
Gaster(reddishMorownr ey. ga oss ea eile ciliata Mayr. 
Gaster dark brown, opaque, densely gray pubescent. 
truncicola mucescens, subsp. nov. 
Gaster black, somewhat shining, finely and sparsely pubescent. 
truncicola obscuriventris var. gymnomma Wheeler. 
Head and thorax of small workers decidedly darker than in 
langestauonkerane Ole PIT SOI I oe en aT 
Head and thorax of small workers scarcely or not at all darker 
than in darvest workers ee OO Oe eee 30 
Flexor surfaces of tibiae with erect hairs................... 28 
Thorax of large workers bright red like the head or at most very 
feebly infuscated; pubescence on gaster dense. 
rufa aggerans Wheeler. 
Thorax of large workers deeply infuscated; pubescence on 
gaster more dilute...... rufa aggerans var. melanotica Emery. 
Head and thorax of large workers entirely or almost entirely 
without “dare spots. Me Vee AS rufa obscuripes Forel. 
Front, vertex, occiput, and thoracic dorsum of large workers 
blackish i720? ere Ne rufa obscuripes var. whympert Forel. 
Gaster brown, opaque, densely gray pubescent.............. 31 
Gaster black, feebly shining, sparsely and finely pubescent. 
truncicola obscuriventris Mayr. 
