39 
SYNOPSIS OF TRIBES OF PONERIN®. 
Te CONG AS ASIII OS ce eee es Se ce Sees ET Aes eet Se WOO E PN eee eee oe a 
Cla Se We CUNMAC wats eenesl ae et) Anette en. DORM a, Bet Sie 5 
Hs JEU qlopres Wyyannak Oye ElyonCrNUntSyoy Ui ses Whee eee Se A ee ee 3 
Hind tibiz without an apical spur____-__________ Tribe I. ONYCHOMYRMICINI 
3. Promesonotal suture usually present; apex of the abdomen from the third 
Segments normal, not curved downward, but porrect____.__________ 4 
Promesonotal suture wanting or obsolete; apex of the abdomen from the 
third segment abnormal, curved downward in such a way that it is 
directed forward beneath; antenna ending in a distinet club. 
Tribe II. CeERAPACHYINI 
4. Head oblong, the eyes not especially small, placed at or a little beyond the 
lateral middle; thorax not constricted at the middle. 
Tribe III. PRoceratTiint 
Head oblong or oval, the eyes usually small, oval, placed before the lateral 
middle sometimes near the base of the mandibles (in a single case very 
minuterand= placed at the middle) = 222 Tribe IV. PONERINI 
5. Head oblong oval, the eyes not small, placed near the lateral middle, thorax 
long, slightly constricted before the middle, the metanotum longer than 
the mesonotum, convex above; mandibles subtriangular, curved down- 
ward with an oblique but broad masticatory edge. 
Tribe V. LkEPTOGENYINI. @ 
SYNOPSIS OF TRIBES OF PACHYCONDYLIN®. 
ie ClawSeClebLinor 2G a Looul beneatheo =. = = els ee 6 
Claw Sisimplesuvowe a tooth) beneath = = == = a ee 2 
2. Head usually oblong, the eyes, when present, never large; thorax usually 
with one or more sutures; if without sutures, the head, thorax, and first 
two segments of the abdomen are longitudinally grooved____________ 3 
Head quadrate or subquadrate, very little longer than broad, the eyes very 
large, placed at the sides close to the base of the mandibles; the thorax 
oblong, subquadrangular, without sutures above or with only the meta- 
notal suture present; scale of abdominal petiole subquadrate. 
Tribe I. LIOPONERINI 
3. Head variable, although usually oblong, but not longitudinally grooved, the 
eyes rather small oval or oblong oval, placed anteriorly before the lateral 
middle, sometimes near the base of the mandibles; mandibles usually 
more or less triangular, the masticatory margin dentate; if slender, the 
a@Tribe I. Onychomyrmicini: Represented by a single genus, Onychomyrmexr 
Emery, found in India. 
Tribe II. Cerapachyini: Well represented in America. The genera are: 
Sphinctomyrmes Mayr, Phyracaces Emery, Cerapachys Smith, Parasyscia Emery, 
Syscia Roger, and Cystias Emery. 
Tribe III. Proceratiini: Genera: Discothyrea Roger, Sysphincta Roger, Pro- 
ceratium Roger, and Prionopelta Mayr. 
Tribe IV. Ponerini: A group of world-wide distribution. Genera: Centromyr- 
mex Mayr, Trapeziopelta Mayr, Myopias Roger, Cryptopone Emery, Rhopalopone 
Emery, and Ponera Latreille. 
Tribe V. Leptogenyini: A tribe readily recognized by its members always 
having the claws pectinate. Genera: Prionogenys Emery, Leptogenys Rogex, 
Lohopelta Mayr, and Simopone Forel. 
