4 Psyche [February 
profile the dorsal scute is only moderately convex. Dorsal surface and legs 
yellowish brown, the former smooth and shining, not polygonally areolated 
under a high magnification, with a darker brown, O-shaped vitta enclosing a 
large, elliptical, pale central area and separated by a pale border from the edge 
of the dorsal scute. Ventral surface of body yellowish; sternal and ano- 
ventral scutes brownish. Dorsal surface densely clothed with short, rather 
stout hairs, which are distinctly longer and sparser in front and on the sides 
than behind. Legs short and stout, anterior border of coxa and trochanter of 
three posterior pairs not laciniate-denticulate, but entire. Hairs on the 
three posterior pairs of legs short, stout and distinctly curved, especially 
towards their tips. Sternum in some specimens connected with the lageni- 
form anoventral scute by a pair of slender processes, which surround the genital 
orifice. In other specimens (Fig. 2) the two processes are separated from the 
anoventral scute, and in still others they may be continuous with this sclerite 
but separated from the sternum. Hairs on the sternum and anoventral scute 
very short and sparse. Chela rather small, its fixed digit flattened, spatulate 
and curved, terminating in a round knob; movable digit dilated at the tip 
where it is bilobed, with one of the lobes folded back. 
Length: 750-790 »; breadth: 700-800 vp. 
Female. (Figs. 3, 5, 6 and 7.) Resembling the male in form and colora- 
tion, but somewhat larger. Sternum large, median and entire, with a very few 
short hairs on its posterolateral portions. Anoventral scute subcordate, pro- 
longed anteriorly as a slender tapering process which terminates between the 
lips of the genital scutes; covered behind with short, sparse hairs. Genital 
scutes resembling those of A. foreli Wasm. Chela with slender tapering 
digits, pointed and hooked at their tips and armed on their inner edges with 
very minute, blunt denticles. 
Length: 760-825 »; breadth: 780-980 p. 
Described from several males and females taken May Sth, 1909 on 
the Faulkner Farm, near Forest Hills, Boston, Mass. They were 
attached to the gular surface of workers of the following ants: Lasius 
flavus L. subsp. nearcticus Wheeler; L. (Acanthomyops) latipes 
Walsh; L. (A.) claviger Roger and L. (A.) interjectus Mayr. 
The new species, which I dedicate to Mr. H. S. J. Donisthorpe, 
the well-known student of British myrmecophiles, seems to be most 
closely related to the European A. foreli Wasm., but the shape of 
the body is more trapezoidal, the hairs on the dorsal surface are 
shorter and more abundant, the pale dorsal area is larger, the chelar 
digits of the female have much smaller and blunter teeth and a differ- 
ent flagellum, and the male chela is of a very different shape, to judge 
from the figures of Berlese and Karawaiew.' The sternum of the 
1 Weitere Beobachtungen tiber Arten der Gattung Antennophorus. (Russian) Mem. 
Soc. Natur. Kieff. XX, 1906, pp. 209-230, 1 fig. 
