of the "Driver'' Ants. 17 



This latter circumstance, in conjunction with the structure of 

 the lower parts of the mouth, and the existence of only eleven 

 joints in the antennte, at once determines the intimate relation of 

 the Driver ants to my genus Typhlopone,* and completely con- 

 firms the views which I published both in my Introduction, and 

 in a paper in the sixth volume of the Annals of Natural History, 

 on the Formicideous nature of Typhlopone, in opposition to the 

 opinion of Mr. Shuckard, that the latter is the female of a dif- 

 ferent family ; an opinion the more remarkable, when it is re- 

 membered that Mr. Shuckard had before him at the same time 

 the interesting genus Anomma (described in a previous number 

 of the same Annals), and which, like the Driver ants, is so very 

 closely allied to the genus Ponera, one of the species of which is 

 actually described by Latreille as wanting eyes. It will thus be 

 seen that the discovery of the winged individuals of the Driver 

 ants is the more to be desired, as it will enable us at once, and 

 still more satisfactorily, to settle the question of the relations of 

 these insects, as well as, I trust, those of the Dorylidce, which, 

 according to the remarks which Captain Boys has communicated 

 to me, are equally Formicideous. 



The Driver ants seem to belong to the genus Anomma of 

 Shuckard, above alluded to, so far at least as I am able to judge 

 from external characters, the unique specimen of A. Burmeisteri 

 being preserved in the British Museum, where the dissection of 

 the mouth of unique individuals is not permitted. The new species 

 may be thus described, 



Anomma arcens, Westw, 

 Neiitr. Nigra, subnitida ; antennis (articulo basali excepto), 

 coxis, geniculis, tarsisque piceis; capite plus minusve oblongo- 

 quadrato, in individuis maximis postice magis angusto, 

 inargine postico emarginato ; clypeo, inter basin antennarum, 

 bicarinato ; antennis in impressionibus duabus insertis, 11- 

 articulatis; oculis obsoletis; mandibulis elongatis, gracilibus, 

 falcatis, ante medium dente majori alteroque pone medium 

 plus minusve distincto, interstitio serrato ; maxillis lobis 

 duobus apicalibus, externo ad apicem setoso ; palpis maxil- 

 laribus brevissimis, et, ut videtur, 3-articulatis ; labio magno 

 carnoso striato, palpis labialibus longitudine labii 2-articulatis, 

 thorace e segmentis duobus longitudine agqualibus constanti, 

 prothorace infero, lateribus dilatatis tamen supra visis; meso- 



* Compare the figures at ihe foot of Plate I, with those in the upper part of 

 Plate II., in the sixth volume of the Annals and Magazine of Natural History, 

 VOL, v. C 



