1462 Hymenoptera in America North of Mexico 



Taxonomy: Letendre and Huot, 1972. Soc. Ent. Quebec, Ann. 17: 117-132 (preliminary 

 considerations to a revision of the microgyna group). 



densiventris Viereck. Colo., N. Mex., Utah w. to CaUf. Ecology: Found in forests and open 

 forests, under stones and logs; only occasionally with use of thatch. 



Formica fusca var. densiventris Viereck, 1903. Amer. Ent. Soc, Trans. 29: 74. 5 . 



Formica microgyna rasilis var. spicata Wheeler, 1913. Harvard Univ., Mus. Comp. Zool., 

 Bui. 53: 395, 469. 5, 9, d. 



Formica microgyna rasilis var. pinetorum. Wheeler, 1917. Amer. Acad. Arts and Sci., 

 Proc. 52: 542. 5 . 



Taxonomy: Brown, 1947. Ent. News 58: 6-8. —Cole, 1955. Tenn. Acad. Sci., Jour. 30: 50. 



Biology: Mallis, 1941. South. Calif. Acad. Sci., Bui. 40: 85. —Cole, 1954. Tenn. Acad. Sci., Jour. 

 29: 165. —Gregg, 1963. Ants of Colo., pp. 589-593. 

 difficilis Emery. Mass. s. to Ga. w. to Iowa. Ecology: Nests are in woodlands, sometimes under 

 stones, and are packed with vegetable debris. Host: Formica pallidefulva (Latreille). 

 Formica rufa difficilis Emery, 1893. Zool. Jahrb., Abt. f. System. 7: 645, 651. 3, 9, 6. 

 Formica difficilis var. consocians Wheeler, 1904. Amer. Mus. Nat. Hist., Bui. 20: 371. $, 



2,<?. 

 Formica habrogyna Cole, 1939. Amer. Midland Nat. 22: 413. 5, 9. 



Taxonomy: Wheeler, 1913. Harvard Univ., Mus. Comp. Zool., Bui. 53: 395, 477-480 (each 

 caste). — Buren, 1944. Iowa State Col, Jour. Sci. 18: 306. —Wheeler and Wheeler, 1953. 

 Ent. Soc. Amer., Ann. 46: 164 (larva). 



Biology: Wheeler, 1904. Amer. Mus. Nat. Hist., Bui. 20: 347-373. —Wheeler, 1906. Amer. Mus. 

 Nat. Hist., Bui. 22: 50-64. —Wheeler, 1910. Ants, pp. 113-114, 205-206, 441-444. 

 dirksi Wing. Maine (Daigle, Aroostook Co.). Ecology: The host nest of the type queen was at 

 the edge of a clearing under bark of a dry stump. Host: Formica fusca L. 

 F(yrmica dirksi Wing, 1949. Canad. Ent. 81: 13-15. 9. 

 impexa Wheeler. Mass., Mich., Minn. Host: Formica fusca L. 



Formica impexa Wheeler, 1905. Amer. Mus. Nat. Hist., Bui. 21: 273. 5 . 



Taxonomy: Wheeler, 1913. Harvard Univ., Mus. Comp Zool., bul. 53: 395-396, 472-473 

 (worker, female). 



Biology: Wheeler, 1906. Psyche 13: 40. —Wheeler, 1910. Ants, pp. 113, 444. 

 indianensis Cole. Ind., Iowa. Ecology: Nest was in a grassy field under a stone and was 

 surrounded with grass debris. 

 Formica indianensis Cole, 1940. Amer. Midland Nat. 23: 224. 5 , (5 . 



Taxonomy: Buren, 1944. Iowa State Col, Jour. Sci. 18: 300, 306. 

 knighti Buren. Iowa (Bonaparte). Ecology: Nest was in a pasture under bushes and 

 surmoimted by a low dome of plant debris. 

 Formica (Formica) knighti Buren, 1944. Iowa State Col., Jour. Sci. 18: 300, 303-305. 5. 

 microgyna Wheeler. Wyo., Colo., N. Mex., Utah, Nev. Ecology: Prefers meadows and open 

 forests. Nests are usually started under stones which are piled with thatching, the 

 thatching increasing in size as the nest g^ws. Host: Formica argentea Wheeler, F. 

 lasioides Emery, F. neogagates Emery. 

 Formica microgyna Wheeler, 1903. Amer. Mus. Nat. Hist., Bul. 19: 645. 5, 9, 6. 

 Formica m,icrogyna microgyna var. reddiva Wheeler, 1913. Harvard Univ., Mus. Comp. 

 Zool., Bul. 53: 395, 467. 5, <J. 



Taxonomy: Wheeler, 1913. Harvard Univ., Mus. Comp. Zool., BuL 53: 395-396, 465-467 (each 

 caste). 



Biology: Wheeler, 1917. Amer. Acad. Arts and ScL, Proc. 52: 542. —Gregg, 1963. Ants of 

 Colo., pp. 584-587. —Cole, 1966. Brigham Young Univ., Sci. Bul., Biol. Ser. 7: 24 (Nev. Test 

 Site). 

 morsel Wheeler. Mass. (South Natick). ^ 



Formica m/yrsei Wheeler, 1906. Psyche 13: 39. 5 . 



Taxonomy: Wheeler, 1913. Harvard Univ., Mus. Comp.ZooL, Bul. 53: 394, 480-481. 



