318 BRITISH ANTS. 



The following myrmecophiles have been taken with F. fusca v. 

 glebaria in Britain : 



Coleoptera : Dinar da pygmaea Wasm., Atemeles paradoxus Gr., 

 Drusilla canaliculata F., and Opatrum sabulosum L. 



Formicidae : Solenopsis fugax Latr. 



Braconidae : Blacus compar Ruthe. 



Proctotrupidae : Gonatopus distinctus K. 



Heteroptera : Nabis sp ? larva. 



Aphidae : Tycheoides setariae Pass. 



Coccidae : Riper sia subterranea Newst. 



Collembola : Cyphodeirus ( = Beckia) albinos Nic. 



Araneina : Evansia merens Camb., Dysdera cambridgei Thor., 

 Harpactes hombergi Scop., Micaria scintillus Camb., and M . puli- 

 caria Sund. 



Acarina : Uroplitella minutissima BerL, Laelaps myrmecophilus 

 Berl., L. oophilus Wasm., and L. cuneifer Mich. 



Crustacea : Platyarthrus hoffmanseggi Brndt. 



Formica fusca L., var. rubescens For. 



Formica cunicularia F. Smith Zool. 11 4080 (1853) 1 . Formica fusca var. 

 fusco-rufibarbis Forel Denkschr. Schweiz. Ges. Naturw. 26 54-55 (1874) 2 . 

 Formica rufibarbis var. fusco-rufibarbis Dalla Torre Cat. Hym. 7 210 (1893) 3 . 

 Formica fusca v. rubescens Forel Ann. Soc. Ent. Belg. 48 423 (1904) 4 . [For- 

 mica fusca v. fusco-rufibarbis Schimmer Sitzung. Naturf. Ges. Leipzig 35 

 17-18 (1908) 5 ?]. Formica rufibarbis Donisthorpe Ent. Rec. 20 281 (1908) 6 : 

 Trans. Leicester Lit-Phil. Soc. 12 223 (1908) 7 [in part]. Formica fusca var. 

 rubescens Donisthorpe Ent. Rec. 21 258 (1909) 8 : Zool. 1909 466 9 . For- 

 mica fusca fusca var. rubescens Emery Deutsch. Ent. Zeitschr. 1909 196 10 ; 

 Wheeler Bull. Mus. Compar. Zool. 53 498 (1913) 11 . Formica fusca var. 

 rubescens Donisthorpe Ent. Rec. 25 66 (191 3) 12 : 26 41 (19 14) 13 . 



ty The large workers have the head anteriorly (clypeus, cheeks, and frontal 

 area), the mandibles, scapes, base of funiculi, thorax, scale and legs yellowish 

 red. The head posteriorly, the apex of antennae, two patches on the thorax (one 

 on the pronotum and the other on the mesonotum, almost fused as in F. pratensis), 

 and the gaster are blackish brown. 



The sculpture and pubescence is the same as in glebaria. The smaller 

 workers are the same colour as glebaria, and are almost indistinguishable 

 from the latter. 



Thorax without outstanding hairs. Long. 5-7 mm. (4-6-5 mm. teste 

 Wheeler.) 



$ Similar to glebaria, but not so dark, with the epinotum and scale almost 

 entirely red. 



I possess a specimen from Fairlight, which has the gaster at the base, 

 sides, and beneath, yellowish red. 



Wings infuscate at base. Long. 8-9-5 mm. (7-9 mm. teste Wheeler.) 



c Black ; duller with legs more reddish than in fusca. 



Scale deeply emarginate and appearing lunate. Wings darker than in the 

 ?. Long. 8-5-10 mm. 



Original description of Formica fusca v. rubescens Forel [Ann. 

 Soc. Ent. Belg. 48 423-424 (1904)] : 



" Je donne ce nom a la grande variete, a thorax rougeatre, dans mes 

 Fourmis de la Suisse. Chez la Q major, le devant de la tete, le thorax, les 



