O FORMICA CONGERENS. 



2, Formica congerens. 



F&mina. Rufo-ferruginea, cinereo-micans ; capite supra, meso- 

 thorace dorso et abdomine fuscescentibus ; antennis, tibiis 

 tarsisque fusco-nigris ; area frontali nitida ; oculis parce pi- 

 losulis. 



Mas. Nigro-fuscus, parum cinereo-micans; capite thoraceque 

 pubescentibus. 



Formica congerens, Nyl. Adno. Mon. Form. 906. 7 ; Addit. Alter. 

 Mon. Form. p. 30 ; Form. Fr. et d'Alger. 61. 15. 

 Foerst. Hym. Stud. Form. 17. 5. 

 Schenck, Beschr. Nass. Ameis. p. 30. 

 Mayr. Form. Austr. 60. 10 ; Ungar. Ameis. 10. 10. 

 Smithy Trans. Ent. Soc. Lond. n. s. iv. pt. 7. 



Female. Length 4^-5 lines. Rufo-ferruginous, and with a fine 

 thin shining cinereous pile ; the head above the antennae, the 

 mesothorax, scutellum and post-scutellum dark fuscous, nearly 

 black ; the abdomen dark mscous, with the base ferruginous ; 

 the tibiae and tarsi dark rufo- fuscous ; the frontal area shining ; 

 the eyes slightly pilose ; the scale of the petiole slightly emar- 

 ginate above. 



Worker major and minor. The same size and colour as F. rufa, 

 but distinguished by the cinereous pilosity which covers the 

 entire insect ; and the abdomen is not shining, as in F. rufa. 



Male. The same size and colour as F. rufa, but readily distin- 

 guished by its pilose head and thorax ; the eyes are also pu- 

 bescent. 



This insect so closely resembles the Wood-ant, that it has no 

 doubt been overlooked by entomologists as a distinct species ; 

 it was taken at Loch Rannoch in Perthshire by a working col- 

 lector. Dr. Nylander says it forms similar nests to F. rufa. 

 It will probably prove to be a generally distributed species, if the 

 attention of entomologists could be directed to the observation 

 of these interesting insects. 



3. Formica sanguinea. 



F&mina. Rufo-ferruginea, Isevissime cinereo-micans; fronte cum 

 vertice et abdomine nigro-fuscis ; squama subtriangulariter 

 rotundata, margine supera rotundata vel leviter emarginata ; 

 alis a basi ad medium pallide rufescentibus. 



Operaria. Capite, thorace pedibusque sanguineis; clypei mar- 



