196 [Aug. 



The statement (in the account that the insect was without eyes, (/. c. the 

 neuter,) was confirmed by Mr. Westwood, which fact renders certain features of 

 their economy the more remarkable. 



Mr. Shuckard gives, in the Annals and Mat^azine of Natural History, London, 

 a new species of the Formicida-, on which he founds the genus Anoinma. To 

 this Mr. Westwood assigns the Driver of West Africa, and describes it as anew 

 species under the name of arceus, in allusion to the remarkable habit whicli has 

 gained for it the significant name of Driver. 



Since his comiiiuiiication to the Entomological Society of London, the author 

 has discovered a second species, which he denominates the Red Driver, a descrip- 

 tion of which follows that of the black species. 



Descriiition. — Family Formicidas {Leach) ; Genus Anomina {Shuciurd). 



Species 1. Arcens {Westwood). 



Neutr. — Nigra, subnitida ; antennis (articulo basali exccpto), coxis, geniculis, 

 tarsisque piceis ; capite plus minusve oblongo-ipiadrato, in individuis niaximis 

 jiostice magis angusto, margine postico emarginato; clypco, inter basin antenna- 

 rum, bicarinato ; antennis impressionibus duabus iiiserlis, 11-articulatis ; oculis 

 obsoletis; mandibulis elongatis, gracilibus, falcatis, ante medium dcnlc niajori 

 alteroque pone medium plus minusve distincto, inlerstitio serrato; maxillis labiis 

 duobus apicalibus, externoadapicemsetoso; palpis maxillaribusbrevissimis, et. ut 

 videtur, 3-articulatis ; labio magno carnoso striato, palpis labialibus longitudine 

 labii 2-articulatis, thorace e segmentis duobus longitudine acqualibuS constanti, 

 prothorace infero, lateribus dilatatis tamcn supra visis; meso-thorace antice 

 latiore, meta-thoracc parum comprcsso utrinquc spiracula instructo, apice recte 

 truncata; abdominis pedunculo elongato utrinque versus basin tuberculo minuto 

 instructo ; segmento sequenti pedunculo latiori semi-ovali, reliquis parum con- 

 strictis. 



Long. Corp. lin. 1^-5. 



Habitat in Africa occidentali tropicali. 



In Mus. Westw. Acad, et Nostr. 



This species was captured at Cape Palmas, Lat 4^ 26' N., and is to be found 

 throughout the West Coast; Cape Palmas, however, and a few hundred miles 

 east and west', being its proper locality. 



Species 2. A. rubella, Savage. 



Neutr. — Rubra, subnitida ; antennis, coxis, geniculis tarsisque rubris, versus 

 marginem diaphanis. 



Long. coip. lin. 13—4. 



Habitat in Africa occidentali tropicali. 



In Mus. Acad, et Nostr. 



The neuters of A. rubella are lessn umerous than those of urcens, and, gene- 

 rally, of a smaller size. The mandibles are less falcate and pointed : their habits 

 the same. 



This species I discovered in the Mpongive District, a section of the west coast 

 on the banks of the Gaboon river, near the Equator. 



Hahits. — They are exceedingly ferocious. They have no permanent dwelling 

 place, but wander about in search of prey. Shallow cavities and crevices in 

 rocks, are adopted as their temporary habitations. The deepest cavity for this 

 purpose discovered, did not exceed two feet. The interior exhibits no mechani- 



