916 The American Naturatist. ` [October, 
Two species of Forbesium occur in our fauna, the first, F. for- 
mosum, having been described many years ago by Dr. H. C. 
Wood, and the second, which may be called F. Ayemale, being un- 
described. The former is a distinctively northern species, rang- 
ing from New York to Colorado, while the latter is evidently its 
southern representative. Both are exceptional in that they 
hibernate as adults rather than in the egg state. 
The undescribed species is represented at Plate X XXI, Fig. 1, 
showing its natural size, and Fig. 2 its structural details magni- 
fied : a, representing a dorsal view of the body; 4, a side view of 
the eye-eminence ; c, a front view of the same; d, a side view of 
the palpus; and e a similar view of the palpal claw. It may be 
described as follows: 
Forbesium hyemale—Female.—Pl. XXXI., Fig. 1,2. Length, 7 mm.; 
width, 4 mm. Legs: I. 32 mm, IL, 60 mm.; IIL, 31 mm.; IV., 45 
mm. Body soft. Dorsum smooth ; mottled cinnamon-brown. A distinct 
dark central marking begins at eye-eminence, and runs two-thirds of the 
way to the posterior extremity* it contracts near the anterior border of the 
abdomen, then expands in an even curve, and again contracts in a similar 
way. There is a deep oblique sinus just back of each lateral pore of 
cephalothorax. On the abdomen are scattered dark spots, arranged in 
irregular t series. Eye-eminence perfectly smooth ; black about eyes 
with a light-brown longitudinal central marking; slightly longer than high; 
not at all canaliculate. Mandibles light gray, with tips blackish; sparsely 
provided with short black hairs. Palpi slender; mottled grayish-brown ; 
all the joints provided with short, black, stiff, spinous hairs. Patella arched ; 
its inner lateral distal angle produced into a pronounced conical tube rcle. 
Tarsal claw distinctly pectinate. Ventral surface light gray. Legs long, — 
rather stout; coxz light gray, remaining joints mottled cinnamon-brown. 
Described from three specimens taken at Auburn, Alabama, by Pro- 
fessor George F. Atkin son. 
Plate XXX. represents Forbesium formosum, the mature female 
being shown natural size at Fig. 1, structural details magnified at 
Fig 2, and the maxillary lobes of the second legs at Fig. 3. 
Both plates are from drawings by Miss Freda Detmers. 
The genus Phalangium as at present restricted contains but two 
of our forms, cinereum Wood and longipalpis Weed. P. cinereum 
is one of our commonest species, and occurs from New York to 
