116 
APPENDIX. 
Male (length 3| — 4 lines). Black ; the legs, tip of the abdomen, 
mouth (not the mandibles) and antennae, pale red ; the latter darkest 
towards their base ; head and thorax of about equal width ; abdo- 
men one-third wider than the thorax ; the scale not notched above ; 
the wings smoky as in the female. (All the sexes from the same 
nest). 
Formica cunicularia. 
Formica cunicularia, Latr. Fourm. 151. Nyland. Adno. Mon. 
Form . Boreal. 913, 11. Foerster , Hym. Stud. Form. 25,9. 
Female (length 4 lines). Antennae, face below them, the man- 
dibles, thorax, legs and scale of the abdomen bright ferruginous ; 
the disk of the thorax of a dark red-brown, or with three or four 
spots of that colour ; the antennae are darker towards their apex : 
the scale is very slightly notched ; abdomen of an ashy black ; at 
the base and beneath having a ferruginous tinge: the wings are 
hyaline, but slightly smoky towards their base ; the nervures are 
testaceous, the stigma brown. 
Worker (length 2 — 2f lines). This sex is similarly coloured to 
the female, but altogether duller ; and the thorax is more elongate 
and narrowed towards the metathorax ; the abdominal scale is not 
notched, and the legs more elongate than in the female. 
Male (length 4 lines). Black ; the legs and tip of the abdo- 
men of a pale reddish yellow ; the scale is quadrate and deeply 
notched above ; the wings hyaline, but smoky towards their base, 
the nervures testaceous, the stigma brown : abdomen elongate, 
about the same width as the thorax, and having a bright silky gloss. 
(All the sexes taken from the same nest.) 
Note. — The male closely resembles that of Formica fusca, but 
distinguished by having the externo-medial nervure continued to 
the base of the wing ; in fusca it becomes obsolete. 
Formica umbrata. B. M. 
Formica umbrata, Nyland. Addit. Adno. Mon. Form. Boreal. Europ. 
1048, 
Hab. — H ampstead. 
