480 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Host (Temporary). F. schaufussi var. incerta. 
TYPE LOCALITY.— Connecticut: Colebrook, (Wheeler). 
Massachusetts: Woods Hole, Ellisville, Forest Hills, Blue Hills 
(Wheeler). 
The habits of this variety are very similar to those of the typical 
form. Its young colonies are not infrequently found mixed with 
F. incerta and, as I have shown in former papers, the recently impreg- 
nated queens establish their formicaries with the aid of this species. 
The characters which separate consocians from the typical form are 
very slight and refer mostly to the pilosity. I believe, however, that 
they will prove to be valid. The variety is evidently a more boreal 
form of the species. 
65. EF. morser Wheeler. 
F. morsei Wheeler, Psyche, 1906, 13, p. 39, fig. 8 . 
Worker. Length 3.5-5.5 mm. 
Mandibles 8-tootbed. Palpi rather long. Head, excluding the 
mandibles, distinctly longer than broad; cheeks long, slightly flattened 
converging in front; posterior border and angles convex and rounded. 
Clypeus convex, carinate, with rounded anterior border. Antennae 
slender; four basal joints of funiculi longer and more slender than the 
penultimate jomts. Thorax in profile with deep mesoépinotal con- 
striction, convex pro- and mesonotum and the epinotum with distinct 
base and declivity, the former convex and rounded, the latter flattened 
and sloping. Petiole narrow, its anterior and posterior surfaces alike 
convex in profile, its border rather blunt; seen from behind the border 
is broadly rounded, in some specimens faintly excised on the middle, 
but not produced upward. Gaster large. Legs rather long. 
Mandibles subopaque, coarsely striatopunctate. Anterior portion 
of head, clypeus, frontal area, lower surface of thorax, and gaster 
smooth and shining; remainder of body subopaque, very finely 
shagreened; upper surface of gaster with a slightly oily luster. 
Hairs white, short, obtuse, suberect, and very sparse on the upper 
surface of the head, thorax, and gaster; nearly always absent on the 
gula and petiolar border. Femora and tibiae naked, the latter with a 
row of tapering hairs on their flexor surfaces. Pubescence white, 
extremely short and sparse, so that it is almost invisible, except on the 
upper surface of the gaster. 
Reddish yellow; borders of mandibles black; anterior border of 
clypeus, vertex, upper surface of pro- and mesonotum, femora, tibiae, 
apical antennal joints, and gaster more or less infuscated; anal region 
