FORMICA SANGUINEA. 7 



gine leviter emarginata ; area frontali opaca ; abdomine 

 nigro-fusco. 



Mas. — Fusco-niger ; pedibus pallide rufescentibus ; clypeo obso- 

 lete eraarginato ; squama supra erassa, transversim subrect- 

 angulari, supra integra vel late subemarginata ; area frontali 

 opaca. 



Formica sanguinea, Latr. Hist. Nat. Fourm. p. 150. pi. 5. f. 29 $ . 



Jurine, Hym. p. 272. 



St. Farg. Hym. i. 203. 4 <? ? $ . 



Foerst. Hym. Stud. Form. p. 20. 6. 



Schenck, Beschr. Nass. Ameis. p. 36. 



Smith, Brit. Form. 101. 2. 



Mayr. Form, Austr. p. 64. 12; Ungar. Ameis. p. 10. 12. 



Ny'l. Form. Fr. et d' Alger, p. 62. 16. 

 Formica dominula, Nyl. Adno. Mon. Form. Bor. p. 905. 6. 



Female. Length 4-4^ lines. — Blood-red, and covered with a 

 fine cinereous pile ; the face above the insertion of the antenna;, 

 the vertex, and the abdomen, black, with more or less of a red- 

 dish tinge ; the anterior margin of the clypeus distinctly emar- 

 ginate ; the thorax with usually two or sometimes three indi- 

 stinct fuscous stripes, but frequently immaculate ; the wings 

 more or less brown towards their base ; the superior margin of 

 the scale of the petiole rounded, or sometimes slightly emar- 

 ginate. 



Worker. Length 3-4 lines. — Blood-red, with the abdomen 

 black and covered with cinereous pile. The worker minor has 

 usually the crown of the head, the disk of the thorax, and the 

 legs slightly fuscous ; the scale of the petiole and the anterior 

 margin of the clypeus emarginate. 



Male. Length 4 lines. — Very like the male of F. rufa, but with 

 the legs entirely red and the flagellum fusco-ferruginous ; the 

 clypeus obsoletely emarginate ; the mandibles longitudinally 

 rugose ; the scale of the petiole emarginate above, its entire 

 width. 



This species has not occurred in the immediate vicinity of 

 London, but is very plentiful in many localities ; it has been 

 taken at Weybridge ; . Hawley, Hants; New Forest, &c. This 

 insect plunders the nests of other species, carrying off their pupae, 

 which, being developed in their nests, become the slaves of F. 

 sanguinea. I have found workers of F.fusca, F. cunicularia, and 

 F.flava in their nests, also a few workers of Myrmica scabrinodis. 

 This species constructs its galleries in banks ; its large workers 

 are a bold and courageous race, attacking with great fury. 



