FORMICA FUSCA. 9 



Very closely resembles the male of F. fusca ; but the form of 

 the scale of the petiole is different, being transverse, with its 

 upper margin emarginate its entire width, the lateral angles ob- 

 lique, and the sides straight. 



Not so generally distributed as F. fusca, but occurring in the 

 vicinity of the metropolis not uncommonly, particularly in the 

 neighbourhoods of Highgate and Hampstead. It is found at 

 Southend, Deal, Dover, Weybridge, Isle of Wight, &c. All the 

 sexes may be found in the nests during the month of August. 



5. Formica fusca. 



Fwmina. Fusco-nigra,nitida,cinereo-micans,parce pilosa ; man- 

 dibulis rufescentibus ; scapis antennarum pedibusque rufo- 

 testaceis ; alis hyalinis, nervis et stigmate fuscis ; squama lata, 

 subtriangulariter subrotundata ; abdomine ovato, subnudo. 



Operaria. Nigra vel fusco-nigra, cinereo-micans ; mandibulis, 

 antennarum scapis, flagellorum basi et pedibus rufo-piceis; 

 squama triangulariter subrotundata. 



Mas. Fusco-niger, nitidus, cinereo-micans; antennis pedibus- 

 que pallide rufescentibus ; squama subrotundata, margine 

 supra leviter emarginata. 



Formica fusca, Linn. Faun. Suec. 226. no. 1722; Syst. Nat. i. 

 963. 4. 



Fair. Ent. Syst. ii. 352. 11 ; Syst. Piez. 399. 13. 



Latr. Hist. Nat. Fourm. p. 156. t. 6. f. 32 $ ? . 



Huber, Reck. Fourm. t. 2. f. 8 , 9 $ , 10 <? . 



Zett. Ins. Lapp. p. 448. 



BruUe, Hist. Nat. II. Canar. iii. 84. 3. 



Losana, Form. Piem. p. 317. 12. 



St. Farg. Hym. i. 205. 6. 



Nyl. Adno. Mon. Form. Bor. p. 919. 15 ; Addit. Alter. 30 ; 

 Form. Fr. et d'Alger. 65. 20. 



Schenck, Beschr. Nass. Ameis. 43. 



Smith, Brit. Form. p. 104. 4. 



Mayr. Form. Austr. 74. 17. 

 Formica glebaria, Nyl. Adno. Mon. Form. Bor. 917. 14. 



Foerst. Hym. Stud. Form. 31. 13. 



Female. Length 3 lines. Black or blackish brown, with a 

 thin shining cinereous pile, which gives the insect an olive 

 tinge; the mandibles, antennae and legs obscure rufo-testa- 

 ceous, the tibiae and tarsi palest ; the legs altogether paie in 

 very fresh specimens ; the anterior margin of the clypeus en- 

 tire ; the frontal area not shining ; the wings hyaline arid iri- 



B 5 



