HETEKOGYNA — MYRMICID^. 99 



maxillary and labial palpi 2-jointed; metathorax unarmed; head very 

 large, siihquadrate, emarginate posteriorly and divided ahove by a lon- 

 gitudinal impressed line !^oloiiO|>»;is Westw. 



AntennsB 11-12-jointed o. 



5. — Petiole attached to upper basal surface of abdomen, whicli is cordate, de- 

 pressed above, convex beneath, acuminate ])osteriorly ; antenna' 11- 

 jointed ; metathorax usually arnied with two spines or teeth, rarely 



unarmed Creiiiastogaster Lund. 



Petiole attached to basal middle of the abdomen 6. 



(5. — First joint of petiole nearly cubical, not or scarcely narrowed anteriorly: 

 ajjical margin of mandibles confusedly dentate, angular, so that when 

 they are closed there is a triangular space between them and the cly- 

 peus ; the latter short, with two longitudinal crests which are terminated 

 in front by two obtuse teeth ; antennte 1'2-jointed, the club 3-jointed : 

 thorax not strangulated above; metathorax with two strong spines be- 

 hind and two very small teeth in front towards anterior margin : max- 

 illary palpi 4-jointed, labial palpi H-jointed iVIyrineeina Curt. 



First joint of petiole narrow and cylindrical at base, nodose and elevated 



at apex 7. 



7. — Last three joints of funicle taken together distinctly shorter than the pre- 

 ceding joints combined 8. 



Last three joints of funicle taken together as long or longer than the pre- 

 ceding joints combined 9. 



8. — Frontal area deep. ol)tusely rounded behind; maxillary palpi 4-o-jointed, 

 lal)ial palpi 3-jointed. 

 Thorax strangulated between meso- and metathorax, the pro- and meso- 

 thorax together more or less hemispherical. ..Aplisenogaster Mayr. 

 Thorax not constricted between me.so- and metathorax, the sutures indis- 

 tinct, prothorax much broader than the rest of the thorax. 



Pogonoiii.yrinox Mayr. 

 Frontal area acute behind ; maxillary palpi 6-jointed, labial jialpi -i-jointed ; 

 metathorax rather flattened above: femora claviform, tibial sjiurs pec- 

 tinate Ifl.yrinica Latr. 



!). — Metathorax entirely unarmed ; thorax strongly constricted above between 

 meso- and metathorax, pro- and mesothorax without trace of suture 

 between them; clypeus longitudinally furrowed medially, its anterior 

 margin jirotuberant and produced beyond the mandibles, wliicli are 

 rather narrow ; anteume 11-12-joiiited, the clul> 3-jointed, of which the 

 last joint is as long or longer than the two i)receding joints united. 



IVIoiioiii4»riiiiii ]Mayr. 



Metathorax armed with two teeth or spines 10. 



10. —Funicle of antennae, which are 12-jointed, without distinct club, gradually 

 thickening from bjise to apex, tirst joint as long as broad, the others 

 beginning very short are gradually lengthened ; eyes very small; man- 

 dibles broad, dentate; frontal area narrow and deep; thorax slightly 

 constri(;ted between meso- and metathorax, the teeth of the latter tri- 

 angular, acute; first joint of petiole narrow and cylindrical at ba.se, 

 nodiform at ajjcx ; maxillary palpi 4-jointed, labial pali)i 3-jointed. 



Kteiiaiiiiiia Westw. 

 Funicle with a distinct club of ;; joints; eyes modeiately large 11. 



