ODONTOM \rHIU.T; — PONERID/E. ' 97 



8. — Wings with two submarginal cells; clypeiisd istinctly prolonged backward 

 between frontal carinse ; scape short, not longer than the fii-st two or 



three joints of funicle 9. 



Wings with only one submarginal cell ; clypeus scarcely prolonged between 

 frontal i-arinse; scape almost as long as the first live joints of funicle ; 

 petiole of abdomen thick, obliquely compressed, rounded above, without 

 scale Tapinoma Fiirst. 



9. —Petiole of abdomen with an erect scale; external genital organs very large, 

 occupying posterior third of abdomen, external genital valves broad at 



base, narrowed at tip which is rounded liiometopuin Mayr. 



I , Petiole of abdomen nodiform, without scale; external genital organs smail, 

 external genital valves almost semicircular DoIicoderiiN I,uud. 



Family ODONTOMACHIDiE. 



Mandibles inserted very close to each other, opposite the insertion of antenngp, 

 and on the middle of anterior margin of the head which is hexagonal and 

 strongly narrowed in front; mandibles long, protul.enmt and suddenly re- 

 curved within at ti]) which is tridentate; eyes rather large; antennae 12- 

 jointed ; petiole of abdomen surmountc' '>y a free, oval, rather thick scale. 



Odoiitomachns Latr. 



Family DORYLID^. 



% . — Body elongate, cylindricjil, subcompressed ; head small, transverse, and 

 when the insect is viewed from above, almost or quite concealed by the large 

 gibbous mesothorax ; eyes and ocelli large .^nd very pnmiiuent ; antenna; 

 usually setaceous; mandibles edentate, forcipate, acute; maxillary and labial 

 palpi S-jointed; thoi.iv. ovate, gibbous; metathorax abruptly truncate be- 

 hind; anterior wings extending beyond apex of abdomen, with one marginal 

 and three submarginal cells, and one recurrent nervure, the third discoidal 

 cell being open at apex ; tibia; with a single apical spur ; abdomen cylindrical, 

 often slightly compressed, the basal segment or node smaller than the fol- 

 lowing segment, quadrate or subquadnite and separated from the remainder 

 of the abdomen by a deep constriction; apex of venter with a more or less 

 deeply emarginate plate, the apical angles of which are usually acute and 

 dentiform and slightly recurved ; ^ and J unknown liabidus Jur. 



Oi' this peculiar geiiUf*, we have five described species, all from 

 ITtah and Texas, and of which only the males are known ; they 

 seem to be common where they occur. 



This is supposed to be the % of Eciton, which, however, is i)laced 

 in the Myrmicidae, the abdominal petiole being composed of two 

 nodes. 



Family PONERIDiE. 



Table of Genera. 



Mandibles long, narrow, acute at tip, without apical margin, and denticulate 

 along inner margin ; clypeus toothed on anterior margin ; petiole almost 

 cylindrical, attached to the abdomen by the whole of its posterior face 

 ( g 9 ) Aniblyopoiie Erichs. 



TBAN8. AMKR. KNT. HOC. (13) SUPPL. VOL. 1887. 



