10 FORMICA FULIGINOSA. 



descent, with the nervures and stigma fusco-testaceous ; abdo- 

 men ovate, with the apical margins of the segments narrowly 

 and obscurely rufo-piceous, the upper margin of the scale 

 rounded and entire. 



Worker. Length 2 3i lines. Of the same nigro -aeneous colour 

 as the female ; the clypeus obsoletely carinated in the middle ; 

 the scale of the petiole, in the large worker, sometimes slightly 

 emarginate. The small worker has the legs and antennae 

 usually paler than in the larger individuals. 



Male. Length 3^-4 lines. Black and shining, with an aeneous 

 tinge ; the legs and apex of the abdomen pale rufo-testaceous ; 

 the scale thickened, subrotundate and widely emarginate above. 



A very abundant species, found in banks, preferring those 

 which have a southern aspect, in which it constructs beautiful 

 and intricate galleries and passages. The nests of this species 

 frequently contain some of the rarest of our Myrmecophilous 

 beetles. 



SUBDIVISION II. The males much smaller than the females. 



6. Formica fuliginosa. 

 Fcemina. Nigra, nitidissima ; mandibulis, antennis pedibusque 



rufescentibus ; tarsis, pedum articulis pallide rufescentibus ; 



capite subcordato; squama parva, subovata; alis hyalinis, 



basi ad medium brunnescentibus, nervis et stigmate obscuris. 

 Operaria. Nigra, nitidissima ; mandibulis, antennarum flagellis 



rufescentibus, tarsis pallide runs ; capite magno, subcordato ; 



ocellis minutis ; clypeo subcarinato ; squama parva, subovata, 



marginibus lateralibus parallelis. 

 Mas. Piceo-niger, nitidus; flagellis, pedum articulis et tarsis 



pallescentibus ; squama parva, subquadrata, parum rotundata ; 



alis sicut in fcemina. 



Formica fuliginosa, Latr. Hist. Nat. Fourm. p. 140. pi. 5. f. 27, 



A.B$,C.DC?,F?. 



Losana, Form. Piem. p. 315. 9. 

 St. Farg. Hym. L 200. 2. 

 Schill. Bemerk. Schles. 55. 



Nyl. Adno. Mon. Form. Bor. p. 915. 12 ; Form. Fr. et d'Alger. 

 66. 23. 



