102 Mr. Smith's Essay on the Genera and 



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



fig. 29, 51 ; Jurine, Hym., p. 272 ; St. 



Farg. Hym., i. 203, 4; Foerster, Hym. 



Stud. Form., p. 20, 0, ^ ; Smith, Cat. 



Brit. Hym. Append., 115, <?, $, ^. 

 Formica domimila, Nyland. Adno. Mon. Form. Boreal. Eur., 



p. 905, 6, ^, $, 2. 



Female. — Length 4 — 4| lines. Head, thorax, legs and scale 

 of the abdomen of a sanguine red ; the face above the insertion 

 of the antennae and the vertex obscurely fu'-.cous ; the inferior 

 margin of the clypeus distinctly notched in the middle : the me- 

 sothorax having three indistinct fuscous stripes ; the wings have 

 the basal half of a smoky brown, the nervures and stigma fusco- 

 ferruginous. Abdomen slightly red at its extreme base, the 

 apical segment slightly pubescent ; the margins of the segments 

 having a few glittering pale hairs. 



JVorJcer. — Lengths — 4 lines. Very similar to F. rtifa ; but 

 the head, thorax and legs are entirely red ; the anterior margin 

 of the clypeus distinctly emarginate ; the scale subtriangular, 

 rounded at its superior margin and sliglitly emarginate in the 

 middle ; abdomen as in the female. 



Male. — Length 4 lines. Resembles that of F. rufa. The 

 legs are entirely red ; the flagellum fusco-ferruginous, the ex- 

 treme base of the scape ferruginous ; the anterior margin of the 

 clypeus slightly notched in the middle ; the mandibles longitu- 

 dinally rugose, rufo-piceous towards their apex ; the eyes not pilose 

 as in F. rufa; the scale sub-emarginate above, or rather trans- 

 versely entire, having the lateral angles somewhat raised : wings 

 as in the female ; abdomen as long as the head and thorax, covered 

 with a changeable sericeous i)ile. 



Var. /3. $ . The head and thorax entirely of a blood red. 



Var. /S. ( ^ major) having the vertex and front fuscous. 



The ( g minor) has the vertex and front, the disk of the pro- 

 thorax, the coxae, trochanters and femora, more or less fuscous. 



I think there can be no doubt of this species being the san- 

 guinea of Latreille. Nylander says that this species as well as his 

 F. truncicola, both answer to the description of sanguinea ; but - 

 •we must bear in mind at the same time that a figure of the scale 

 is given, and it is much more like that of the present species than 

 that of the worker of F. truncicola, and I think Latreille would 

 not have omitted to mention the pubescence with which the latter 

 insect is covered ; and, above all, Nylander leans to this opinion : 

 I have therefore adopted Latreille's name. 



