12 FORMICA NIGRA. 



Female. Length 3 lines. Brown-black ; the mandibles, antennae 

 and legs pale ferruginous ; the flagellum, tibise and tarsi darkest ; 

 the antennae and legs destitute of pubescence ; the head as wide 

 as the thorax and slightly emarginate behind ; wings hyaline, 

 with the basal half fuscous. 



Worker. Length 1J-2 lines. Rufo-testaceous ; the vertex 

 brownish ; the front with a conspicuously impressed line. 



Male. Length 2 lines. Nigro-fuscous or brownish black ; the 

 antennae and legs pale fusco-testaceous ; a deeply impressed 

 line in front of the anterior ocellus ; the scale notched above, 

 the basal half brownish. 



This species has long been enumerated in the list of native 

 ants, but the species which represented it was the F. umbrata of 

 Nylander. The only specimen captured in this country, that I 

 have seen, was taken by myself on the sand-hills at Deal ; it was 

 not recognized at the time of capture, or probably it would have 

 been found, on searching, not uncommon in that locality. The 

 F. emarginata will very probably be found in England ; and I 

 should have included it, had not the specimen in the Kirbyan 

 collection ticketed " emarginata" been a worker of F. sanguinea. 

 Latreille says F. emarginata was sent to him from England by 

 Mr. Kirby, but no specimens exist in the collection ; I therefore 

 leave it for its next discoverer to add to our British Formicidce. 



8. Formica nigra. 



Fcpmina. Fusco-nigrescens, nitida, dense undique ciriereo-mi- 

 cans ; mandibulis antennisque obscure rufescentibus ; pedum 

 articulis tarsisque pallide rufescentibus ; capite thorace angus- 

 tiore ; alis lacteo-albis, nervis et stigmate pallide testaceis ; 

 squama verticaliter subrectangulari, supra angulis rotundatis 

 et medio subangulatim emarginata. 



Operaria. Fusco-nigra, cinereo-micans, nitida, sparse pilosula ; 

 antennarum scapis et mandibulis rufescentibus; tarsis et pe- 

 dum articulis pallide testaceis ; squama subrectangulari, supra 

 parum vel vix emarginata, 



Mas. Niger vel fusco-niger, parum cinereo-micans, nitidus; 

 antennarum flagellis fuscescentibus, articulo primo crassius- 

 culo ; squama parva, transversim subrectangulari, supra parum 

 concaviuscula. 



