Peckham—Revision of the Attidce of North America. 525 
but the cephalothorax is shorter and the eye-region is propor¬ 
tionately broader, the quadrangle being a little narrower behind; 
the palpus is much smaller, the tibia has not the long, thin pro¬ 
jection, nor a broad lobe below, but a moderate, curved black 
process; the bulb of palpus has a swollen part not seen in 8. 
pulex. 
One male from a deep and cold swamp near Ithaca, Y. Y.” 
Mr. Banks writes us that the spinal armature is as follows: 
tibia I, II 2 pairs below, one near base, the other beyond mid¬ 
dle ; on tibia I the inner one of second pair longer than the other 
and placed rather more inward than usual. 
HABROCESTUM PULEX H. 1845. 
Plate XLII, fig. 11. Plate XLIII, fig. 1—Id. 
1845. Attus pulex H. $ $, Jour. Bost. Soc. Nat. Hist., V. 
1875. Attus pulex H. $ <j>, Occ. Pap. Bost. Soc. Nat. Hist., II, p. 65. 
1885. Cyrba pulex K. rf, Ver. zool-bot. Gesellscliaft, Wien, VI, p. 509. 
1885. Saitis xnotata K. $, ibid., p. 510. 
1888. Saitis pulex P. g $, Wis. Acad. Sciences, Arts and Letters, VII, 
N. A. Attidae, p. 67. 
1891. Saitis pulex E. <j>, Trans. Conn. Acad., VIII, N. E. Attidae, p. 
28. 
Length, 8 4 mm., $ 4.5 mm. Legs, 8 4312, $ 4312. 
The third and fourth are much longer than the first and second. 
The spines are alike in the male and female, the tibiae of 
the first and second legs having, below, three under the pos¬ 
terior border, and one under the anterior, with two anterior 
laterals. The typical species in this genus, has the six spines 
arranged in three pairs. The first and second metatarsi have 
each two pairs, besides laterals. 
In the male the cephalic part is rufus, with a narrow white 
triangle pointing forward. The front of the thoracic part is 
covered with white hairs. The hinder thoracic part and the 
sides are darker. When rubbed, these parts are yellow or 
orange and the cephalic plate is black. The abdomen is dark 
brown with two nearly parallel light lines on the front half; 
