WHEELER: ANTS OF THE GENUS FORMICA. 489 
Indiana: Tippecanoe Lake (W. S. Blatchley). 
Nova Scotia: Digby (J. Russell). 
Described from a large number of specimens, all agreeing in the 
characters noted above. 
72. FE. EXSECTA EXSECTA Nylander. 
F. exsecta Nylander, Acta Soc. Fennica, 1846, 2, p. 909, pl. 18, fig. 20,8 2 o; 
Ann. sci. nat. Zool., 1856, ser. 4, 5, p. 63, pl. 3, fig. 7, 8 @ o; Forster, 
Hymen. stud., 1850, 1, p. 23, 8 @ o; Mayr, Verh. Zool. bot. ver. Wien, 
1855, 5, p. 340, 8 @ &; Europ. Formicid., 1861, p. 46-48; Forel, Denks. 
Schweiz. gesell. Naturw., 1874, 26, p. 51, 8 @ o; Ern. André, Spec. 
Hymén. Europ., 1882, 2, pt. 14, p. 178, 185, 188; Dalla Torre, Catalog. 
Hymen., 1893, 7, p. 195; Ruzsky, Formicar. Imper. Ross., 1905, p. 353, 
figs. 67, 68; Emery, Deutsch. ent. zeitschr., 1909, p. 189, fig. 5; Ibid., 
1912, p. 672. 
WorkKeER. Length 5-7.5 mm. 
Mandibles 8-toothed, with additional indistinct denticles on the 
basal margin. Head longer than broad, narrowed somewhat at the 
posterior corners so that it is here no broader than at the anterior 
border; posterior border deeply excised. Front convex; clypeus 
sharply carinate, without a distinct, transverse depression behind its 
anterior border. Maxillary palpi long, 6-jointed. Pro- and mesono- 
tum not very convex; mesoépinotal constriction shallow, broad at 
the bottom. Spiracles of metanotum prominent. Epinotum rounded, 
without distinct base and declivity. Petiole narrow, strongly com- 
pressed anteroposteriorly, its superior margin thin, sharp, and very 
deeply excised. 
Opaque or slightly shining. Mandibles finely striated and coarsely 
punctate. 
Hairs very sparse, distinct on the gaster, where they are short and 
obtuse. Pubescence yellow, moderately abundant, especially on the 
head, prothorax, and gaster, longest on the cheeks. Eyes hairless. 
Red or sordid yellowish red; clypeus and appendages darker, postero- 
dorsal portion of head, a large spot on the pronotum and often also 
a small one on the mesonotum, brown; gaster blackish brown, base of 
first segment red or yellow. 
FEMALE. Length 8-9.5 mm. 
Resembling the worker. Anterior border of clypeus straight in the 
middle. Thorax with flattened mesonotum and scutellum. Petiole 
much broader, flatter, and more deeply excised than in the worker. 
Sculpture much as in the worker. Hairs more abundant especially 
on the mesonotum, posterior border of pronotum, and front of head. 
Pubescence longer but sparse, conspicuous both on the body and 
appendages. 
