Species of .British Formicida. 103 



F. sanguinea occurs plentifully in the fir woods of Hampshire, 

 or rather at their sides. I have always found its colonies in banks, 

 or in stumps of decayed trees. It also occurs at Weybridge. 

 Their societies are not so numerous as those of F. rxifa ; the large 

 workers are very courageous, on disturbing their nest they will 

 seize a finger, and retain their hold until their heads are torn off 

 in removing them ; 1 have found all the sexes in the nest in the 

 month of August. 



Sp. 3. Formica cun'icularia. 

 Foemma. — Rufo-ferrugineo, cinereo-micans ; palpis, antennarum 



flagellis abdominisque castaneo-atris ; mesothorace maculis 



tribus longitudinalibus, una antice aliaque laterali utrinque, 



scutello, post-scutello, mesosterno, tarsis apicis fuscis ; squama 



lata, sub-cordata, vel supra truncata tantum leviter inaequali ; 



alis hyalinis, basi parum fumatis : nervis et stigmate fusco- 



ferrugineis. 

 OjKrar'ia. — Rufo-ferruginea, cinereo-micans ; capite supra, palpis, 



flagellis et abdomine castaneo-atris ; thorace supra et pedibus 



fuscescentibus ; squama supra subtruncata vel leviter emar- 



ginata. 

 Mas. — Ater, cinereo-micans, pedibus rufo-testaceis, coxis basiex- 



ceptis ; oculis nudis, squama supra late concava, valvula ven- 



trali sparse pilosa, disco fere toto subrotundato plane impres- 



siusculo. 



Formica cunicularia, Latr. Hist. Nat. Fourm., p. 151 ; Huber, 

 Rech. Fourm., tab. 2, fig. 11,^12, 13, ?, 

 2 , ^ ; St. Farg. Hym., i. 203, 5 ; Lo- 

 sana, Fourm. Pied., 10; Nyland. Adno. 

 Mon. Form., 913, 11 ; Foerster, Hym. 

 Stud. Form., p. 25, 9. 



Formica stenopiera, Foerster, idem, p. 26, 10. 



Female. — Length 4 lines. Resembles F. sanguinea ; the an- 

 terior margin of the clypeus somewhat angulated, convex above 

 and subcarinate in the middle ; the clypeus, face on each side, 

 mandibles and base of the flagellum, rufo-ferruginous ; the thorax 

 above sometimes entirely fuscous, sometimes having tliree fuscous 

 stripes ; the claw joint of the tarsi fuscous ; the extreme base and 

 apex of the abdomen more or less ferruginous. 



Worker. — Length 3 — 3^ lines. Resembles the F. rufa, but has 

 the scape of the antennae more slender and not thickened at the 

 apex, the flagellum is also more slender ; the angular shape above 

 the clypeus is opaque, in F. rufa it is polished; the face black above 



