
722 THE AMERICAN NATURALIST. [VoL. XXXVI. 
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5th Subfamily: CAMPONOTINE. 
Mandibles long, linear, denticulate ; eyes very mid Myrmoterus Forel 
Mandibles of a different conformation . . . es. vp iL 
Antenne II-jointed, or less . . ee ee ern ee le 
Antenne 12-jointed . i. 
Clypeus projecting Feeder ove he vsadiblnk: eyes inci enormous, 
anana BIO S. a RO. o own esomyrmex Mayr 
Of a different conformation 
Last joints of the antennz bem Ns a differentiated lada: antennz 
g-Io-jointed . . . . . -Myrmelachista Roger 
Antenne without a differentiated b 
Frontal carine separated from each other by a paci daat dá 
from the lateral borders of the head 
Frontal carinz closer to each other chad to sie TRE tordi of the 
Eyes reniform, very large . . . . . Dimorphomyrmex Er. André 
Eyes oval, of medium size . . . Aphomomyrmex Emery 
Maxillary palpi 2-jointed, labial dn pag VS ‘inact Roger 
Maxillary palpi 6-jointed, labial palpi 4-jointed 8 
Metanotum and scale more or less 2-toothed or actu 
* Acantholepis Mayr 
Metanotum and scale unarmed 9 
Antenna I11-jointed (Old World gi : ioc * Plagiolepis Mayr 
Antenne 9-jointed, exceptionally 11-jointed ; tioni short and thick- 
set (American species). . Brachymyrmex Mayr 
hym; 
Eyes very large, occupying iy the whole 7 the sides of the head 
Gigantiops Pe 
Eyes occupying less than one-half of the sides of the head . 
. Prothorax with an angular crest on either side; mesonotum ME 
nent,in the form of a boss ; gizzard as in dos Notoncus Eu 
Thorax of a different conformatio 
Antennz inserted some distance behind tne ae gizzard w ik bod 
straight sepals 13 
tennz inserted very near ihe poterint edge of the epe eus . 20 
Maxillary palpi 5-jointed; petiole elongate, narrow ; stature saddle 
but not dimorphic in the form of the head . (Ecophylla F. Smith 
Maxillary palpi 6-jointed ; petiole short, squamiform or nodiform, me 
spinose or dentate . . 
Dimorphism clearly sedi in be size, dors; nd ien in i die scale 
of the head; stature usually very variable . . * Camponotus wee 
No marked hace phen 1 in the workers ie de di 
Eyes placed towards the posterior PONR of the ith d 
Opisthopsis Emery 
Eyes on the sides of the head Qc me 9 

