Peckham—Revision of the Attidce of North America. 521 
back, near the thoracic line, is a large, triangular, velvety black 
spot, and in the midst of this is a short white streaked edged with 
red. Continuous with this, and running to the hind margin, 
is a white or light red line. The marks on the abdomen are 
sometimes bright red, sometimes nearly white. There are some 
indistinct bands in front, and two large spots behind the middle, 
some chevrons farther back, and two bands on each side, at the 
end. The legs have black rings, on which grow black hairs, at 
the ends of the joints. In the female the tibia and tarsus of 
the palpus, which is otherwise red and white, are light brown 
covered with white hairs, but in the male these joints are very 
broad and blunt, and are jet black, with black hairs. 
We caught one male of this species, on logs, at Glacier, B. C. 
In life the red was not nearly so bright as it afterward became 
in alcohol. A male and two females were afterward sent us by 
Mr. Emerton, from Paradise Park, Mt. Banier, Washington. 
A Sittacus in the Cambridge museum from Labrador, collected 
by Mr. C. Schmitt, is almost certainly this species, but the epi- 
gynum is slightly different, and the marks are rubbed. 
HABROCESTUM E. S. 1876. 
Type, PULLATUM E. S., (agilis E. S.). 
1869. Attus (agilis) Simon, Monogr. des Att., p. 73. 
1845. Attus, (pulex) H., Jour. Bost. Soc. Nat. Hist., V. 
1875. Attus, (pulex) H., Occ. Pap. Bost. Soc. Nat. Hist., II, p. 65. 
1876. Habrocestum, Simon, Arachn. de France III, p. 131. 
1885. Cyrba (pulex) K., Yer. zool-bot. Gesellschaft, Wien, YI, p. 509. 
1885. Saitis (xnotata) K., ibid., p. 510. 
1888. Saitis (pulex) P., Wis. Acad. Sciences, Arts and Letters, VII, 
N. A. Att., p. 67. 
1888. Astia (morosa) P., ibid., p. 71. 
1891. Saitis (pulex) E., Trans. Conn. Acad., VIII, N. E. Attidas, p. 28. 
1905. Habrocestum B., Am. Nat., XXXIX, p. 322. 
Cephalothorax long, high and convex with sides nearly paral¬ 
lel ; cephalic part inclined forward, thoracic falling steeply from 
a little way behind dorsal eyes. Eye-region 1-4 wider than long, 
occupying about 2-5 of the cephalothorax, wider in front than 
