88 CHAPTER I 



CREMATOGASTER LINEOLATA Say 



t Brit. Isl. E Can., E U.S.A., S to Color. & Flor. 



(often indoors). 



FORMICA ciNEREA Mayr 

 /. typ. sbsp. lepida Wheel. ^ 



Eur. (except Brit. Isl. & the north), W Can.-Calif. & Utah, E to N. & S. 



Cauc, Asia Minor. Dakota. 



FORMICA FUSCA L. 



Brit. Isl., N & C Eur., N & C Asia E Alas.-Labr., Nfld., N U.S.A. S to Ariz, 

 to Amur, China, Kamch. & Sakhal. 



FORMICA RUFIBARBIS F. 



/. typ. sbsp. occidua^ Wheel. sbsp. gnava Buckl.i 



Brit. Isl., Eur. (widely), Wash.-Calif. Utah-Tex., Mexico. 



Cauc, N. & C Asia E to 

 Lena R. & Manchur. 



FORMICA SANGUINEA Latr. 



/. typ. sbsp. siibnuda Emery^ 



Brit. Isl., Eur. (generally), Cauc, N & Alas.-Labr., Nfld., NE U.S.A., in Rocky 

 C Asia E to Amur, Japan. Mts. S to Ariz. 



IRIDIOMYRMEX HUMiLis Mayr 

 Cosmopolitan. 



t Brit. Isl., W & C Eur. (indoors). f S U.S.A., N to S. Carol. 



Indigenous in S. Amer. 



LASius ALiENUS Foerst. 

 /. typ. sbsp. americanus Emery^ 



(pallitarsus Prov.) 

 Brit. Isl., Eur. (widely), N. Afr., Cauc, Brit. Col. -Nov. Scot, (with gaps), S to 

 N & C Asia, China, Japan. Ariz. & Flor.; Mexico. 



LASIUS FLAVUS F. 



/. typ. sbsp. hrevicornis Emery^ 



Brit. Isl., Eur. (except the Wash.-Sask., S to E Can. & U.S.A. E of 



north), Cauc, Asia Minor, Color. Rocky Mts., S to N. Carol. 



Sib. E to Amur, Japan. & Tenness. 



^ Possibly distinct species, according to Yarrow {in lift.). 



2 Smith (1951) recognizes 5 North American sbspp. oi sanguinea Latr. Wilson & Brown 

 (1955) regard sanguinea Latr. as a purely Eurasian species. 



' Wilson (1955, p. 62 a.f.) in principle does not use subspecific names in Lasius but the 

 Palae- and Nearctic forms are (in part) identical in flavus F. only. 



