AN AMERICAN CERAPACHYS. 183 







distinctly crenated edges to their blades. Antennal scape somewhat more 

 than half the length of the head exclusive of the mandibles, rapidly incras- 

 sated towards its apex, which is provided with a deep concavity on the 

 anterior lateral surface for the insertion of the funicle ; funicle lo-jointed ; 

 first joint longer than broad, almost concealed in the concavity of the 

 scape ; joints 2-9 distinctly broader than long, gradually increasing in size 

 distally, terminal joint very large, glandiform ; constituting a club which 

 is as long as the five preceding joints of the funicle. Thorax cylindrical, 

 fully two and one half times as long as broad, oblong when seen from 

 above, dorsal surface flattened, mesoepinotal suture hardly indicated by 

 a faint constriction. Posterior surface of epinotum abruptly declivous, 

 carinate on either side and with an indistinct tooth above. Petiole subcu- 

 boidal, a little longer than broad, with flat dorsal surface ; lower surface 

 produced anteriorly into a large, compressed, plowshare-like tooth. Post- 

 petiole flattened dorsally, one and a half times as long as the petiole ; 

 when seen from above its anterior margin is hardly broader than the petiole, 

 but its posterior border is half again as wide ; its lower surface is convex 

 and projects forward a little in front of the anterior dorsal border. Stridu- 



! IG. r. Cerapachys {Farinysciii} nn^nslu' n. sp. Worker. 



latory organ highly developed, occupying the whole of the intersegmental 

 membrane between the postpetiole and gaster. First gastric segment cylin- 

 drical, flattened on its dorsal surface, fully one and a half times as long as 

 the postpetiole, slightly wider behind than in front. Remaining gastric 

 segments very short, forming a rapidly declivous termination to the ab- 

 domen ; second, third and fourth gastric segments of about equal length, 

 tergite of the fifth segment triangular, covered with small but distinct 

 spines on its lateral and posterior border. Sting thick, exserted. Legs 

 rather short, all the tibia? furnished with pectinate spurs. 



Surface of body shining, except the head, which is subopaque. Mandi- 

 bles finely and indistinctly striated. Head covered with large, close-set, 

 umbilicate foveolae except on the folds of the posterior angles which are 

 coarsely coriaceous. Whole thorax covered with umbilicate foveolae like 

 those on the head. On the petiole and postpetiole the foveolae are as large 

 as those on the head and thorax but less densely aggregated ; on the first 

 gastric segment the foveolae are distinctly smaller and much further apart. 



