No. 429.] THE FAMILY OF FORMICIDE. Tis 
Frontal carinz of a different conformation EON ou 
. Antenne 12-jointed ; abdomen stretched out straight (Africa) 
Probolomyrmex Mayr 
Antenna 9-jointed, tip of the abdomen deflected down and forward 
(America, Africa, Australia) . . . . . Discothyrea Roger 
Frontal caring very close to each other; antenna inserted very near 
the oral margin. Tip of abdomen Meus deflected downward to 
Frontal carine of a different conformation, or the tip of the abdomen 
not deflected. . "— n 
. Clypeus in front projecting in "he middle; petiole odin (America, 
Europe, Australia) . . . *Sysphincta Roger 
Clypeus not projecting in Goki petiole sce like (America, Europe) 
ratium Roger 
11. Abdomen straight and constricted behind each segment; pygidium 
impressed or furcate (South America, Australia) 
oo ie 
oo 
v 
— 
o 
Abdominal segments not constricted 
12. Body cylindrical with an elongated bud; usually with one ocala on 
the vertex IT : ee ge GR) 
Of a different chukemádion pou pss 14 
13. Antenne 12-jointed (eciabtenicaly. oe TUN UR Cjlnitosiyivex May 
Antenne I11-jointed (Africa) . . Simopone Forel 
14. Petiole inserted behind on the EA Herai its whole breadth ; 
antennz 12-jointed . . ea KC 
Petiole constricted off from the jjoutpétiolé, PAR separate, eo qa 
15. Middle and hind tibize without spurs, claws very large, eye well devel- 
oped (Australia) . . . Onichomyrmex Lr 
Middle and hind tibiz Maid: eye very dal: 16 
16. Pygidium with a row of prickles on its lateral badei niie square ; 
antennz robust (South America). . . . . Acanthostichus pe 
Pygidium without prickles on its border . 
17. Very small (at most 214 mm.); funiculus with a Guinn als: - 
one spur well developed on the middle and hind —À Vorne America, 
Australia) . Re gar 
Larger, middle al hind tibiae tach ici two spurs 18 
18. Integument shining . . E tea To : 
Integument at least in SE opaque, ies nip tured 
I9. Antennz very thick, the whole funiculus club-like iis. dao din) 
Myopopone Roger 
Antennz with filiform funiculus, but slightly thickened towards its tip. 
(Australia) Amblyopone Erichson 
Mandible bine: at its aoc or Ld a dui dilatation (Madagascar, 
ia) . . Mystrium Roger 
Mandible poisid a at its itip (Amirin, kanpi hiin Australia) 
* Stigmatomma 
N 
9 
oger 

