ODONTOMACHID.T. — I'ONERID.E. 97 



8. — Wiiifis with two siibmarginal cells; elypcusd istinctly proloTin;<'<l backward 

 between frontal carinse ; scape short, not lonj^er than the first two or 

 three joints of funicle 9. 



Wings with only one siibmarginal cell ; clypeiis scarcely prolonged between 

 frontal carinje: scape almost as long as the first five joints of funicle ; 

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



scale Tapinoiiia Foi-st. 



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 I^ioiiiotopuiii Mayr. 



Petiole of abdomen nodiform, without scale; external genital organs small, 

 external genital valves almost semicircular DolicoderiiN Lnnd. 



Family ODONTOMACHIDiE. 



Mandibles inserted very close to each other, oiiposite the insertion of antennse, 

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

 strongly narrowed in front; mandibles long, protuberant and suddenly re- 

 curved within at tip which is trideutate ; eyes rather large ; antennae 12- 

 jointed ; petiole of abdomen surmounted by a free, oval, rather thick scale. 



Ocloutoiiiaclius Latr. 



Family DORYLIDiE. 



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

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

 gil)bous mesothorax ; eyes and ocelli large and very prominent; antenna' 

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

 palpi 2-jointed; thorax 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 ; tibise with a single apical spur ; abdomen cylindrical, 

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

 lowing segment, quadrate or .subquadrate and separated from the remainder 

 of the abdomen by a deep consti'iction ; 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 9 unknown LabMliiM Jur. 



Of tlii.s jjeculiar geiui.s, we have five desci'ibed specie.s, all from 



I'tah and Texas, and of wliich only the males are known ; they 



seem to he common where they occur. 



This is supposed to be the % of EcHon, which, however, is placed 



in the iNIyrmicidie, the abdominal ])etiole being composed of tw'o 



nodes. 



Family PONERIDiE. 



Table of Genera. 



Mandibles long, narrow, acute at tij), without apical margin, and dcMticiilalf 

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

 cylindrical, attached to the abdomen by the whole ot" its posterior face 

 (g 9) .liubI.VO|>oilc Erichs. 



TRANS. AMKK. KNT. SOC. (13) SUPPL. VOL. 1887. 



