100 Mr. Smith's Essay on the Genera and 



Sp, 1. Formica rufa. 



Foemlna. — Rufo-ferruginea — fronte cum occipite, mesothorace 

 supra, scutello et post-scutello, et abdomine supra castaneo- 

 nigris ; cly pei medio, palpis, antennis,mesothorace, tibiis, tarsisque 

 fuscescenlibus ; squama lata subtriangidariter fere rotundata 

 margine supero inequali ; alis fusco-hyalinis, apicis subhyalinis. 

 Operaria. — Testaceo vcl rufo-ferruginea nuda, levissime cinereo- 

 micans, fronte cum occipite et abdomine castaneo-fuscis ; occipite, 

 antennis, tibiis, tarsisque fuscescentibus; squama, abdominis basi 

 et ano rufo-maculatis. 

 Mas. — Nigro-fuscus, parum cinereo-nitens, sparse pubescens, 

 pedibus rufescentibus ; squama subquadratahumili crassa, supra 

 vix vel parum concaviuscula ; valvula ventrali pilosula saepe 

 rufescente. 

 Formica rufa, Linn. Faun. Suec, No. 1721 ; Syst. Nat., i. 



962, 3; Scop. Ins. Cam., p. 313, 836 ; Fabr. 



Ent. Syst., ii. 351, 8 ; Syst. Piez., 396, 11 ; 



Schrank, Ins. Aust., No. 834 ; Rossi, Faun. 



Etrus., ii. 113, 836; Don. Brit, Ins., xiv. 



76, tab. 496 ; Latr. Fourm., p. 143, tab. o, fig. 



28, $ , 5 , ^ ; Jurine, Hym., p. 272 ; St. Farg. 



Hym., i. 201, 3; Curtis, Brit. Ent., xvi. tab. 



752 ; Zett. Ins. Lapp., 449, 5 ; Nyland. Mon. 



Form. Boreal., p. 902, 5 ; Foerst. Hym. Stud. 



Form., p. 13, 3. 

 Formica dorsata, Panz. Faun. Germ., 54, 1,2. 

 Formica ohsoleta, Zett. Ins. Lapp., 449, 5, ^ , 2. 

 Formica lugubris, Zett. idem, 449, 6, ^ . 



Female. — Length 4| — 5 lines. Head as wide as the thorax, 

 fusco-nigro ; the sides of the face below the eyes, and the cheeks, 

 rufo-testaceous. Antennae fuscous, the scape sometimes rufo-fus- 

 cous; the mandibles rufo-ferruginous, covered with a short sparing 

 pilosity, the eyes pilose. Thorax rufo-ferruginous, subovate; 

 the disk, scutellum and post-scutellum nigro-fuscous, the scutellum 

 polished ; a slightly impressed line on the mesothorax anteriorly, 

 not reaching the middle of the disk, a similar abbreviated line on 

 each side over the insertion of the wings, the latter fusco-hyaline, 

 paler towards their apical margins ; the coxae, trochanters and 

 femora rufo-ferruginous ; the tips of the femora, tibia? and tarsi 

 fusco-ferruginous. Abdomen nigro-fuscous, subglobose, smooth 

 and shining, the scale, base and apex rufo-ferruginous. 



