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- 429.] THE FAMILY OF FORMICIDE. 713 
Antennz without a differentiated club; claws usually toothed or 
split 
. Petiole distinctly pedunculate; thorax above with distinct sutures 
South America . . Typhlomyrmex Mayr 
Petiole not pelina; ; Pass above without sutures (New Guinea) 
Rhopalopone Emery 
. Third abdominal segment strongly fornicate dorsally, so that its pos- 
terior margin is directed downward, or even somewhat forward;. 
thoracic dorsum without sutures. . . . . . Se nee, | 
Of a different conformation 37 
Eye small ; third abdominal — sstonighs deflected (South Ainii 
Alfaria Emery 
Eyes larger; third abdominal segment but aksi deflected (southern 
Asi Stictoponera Mayr 
i Paoa suture ohda d or distinct as a deep depression, which 
oes not, however, interrupt the sculpture of the integument (South 
America) . Ectatomma F. Smith 
Promesonotal suture ‘distinct wed sharply c ibn — the sculpture 
of the integument . 8 
. Antennal fovea elongated DackWarda as a groove ; yiii with Reeth 
or spines; hind coxa unarmed (South America, Australia 
canthoponera Mayr 
Antennal fovea not elongated € epinotum unarmed ; hind 
coxa unarmed (Australia) . yti —€— Mayr 
Antennal fovea not elongated ; eot eden hind c with a 
spine (South America) . nen Mayr 
Episternum of mesothorax balloiete out ; : petiole behind with two teeth 
or spine (India and Australia) . (ue: eo Diacamma z 
Episternum of mesothorax not hefuwed out . 
. Medial spur of the middle and hind legs alone developed, the el 
4 
spur is lacking, or very small (Trapeziopelta) : 
Both spurs of the middle and hind legs well developed . . . . 47 
. Integument smooth or sculptured, without pubestence . . 42 
Integument delicately sculptured ; at least the abdomen puliseciot 45 
. Clypeus in the middle with a slender projecting lobe ; lateral spur small 
but distinct (Malasia and daten: . . . . Trapeziopelta Mayr 
C igpeos without a aF : ; 43 

ae flat and point 4(Africa) b paslidourpieiek Andee 
Mandible slender, with. a few teeth on the PER border ^ 44. 
Mandible obtuse at the end (Africa) Plectroctena F. Smith 
andible pointed, its medial border with two eeth (Ceylon) 
Myopias Roger 
. e) in front with a needle-shaped process (South America) 
Belonopelta Mayr 
Clypeus without a point in front. . . peo Gree WE 
