Peckham—Revision of the Attidce of North America. 447 
of chevrons being edged with black, npon which appear two pairs 
of white spots, the posterior pair obliquely elongated. These 
markings are very variable. The femur and patella of the pal¬ 
pus are white or light brown, with white hairs, and the tibia 
and tarsus which are much thickened, in the female as well as 
in the male, are black, with thick long black hairs, intermingled 
with shorter white ones. The legs ar© brown, the first and second 
pairs darkest. In the male the tibiae and metatarsi of the first 
and second legs, especially of the second, are highly iridescent, 
and have, on both upper and under sides, long fringes of stiff 
hairs, longer on the second leg than on the first. These fringes 
are deep black on the first leg and on the under side of the sec¬ 
ond, while on the upper side of the second leg they shade 
through two-thirds of their length, from a light to a very dark 
brown, and then have the tips pure white, making a strong con¬ 
trast. The patella of the second leg has dark tufts, above, below, 
and on the front face. 
We have one male from Arizona and numerous examples from 
eastern Guatemala. Cambridge had it from Costa Rica and 
Mexico. 
THIODINA E. S. 1900. 
1845. 
1850. 
1875. 
1883. 
1885. 
1888. 
1900. 
1901. 
1901. 
1905. 
Type, Attus elegans Nicolet. 
Attus hentz (puerperus, sylvanus), Jour. Bost. Soc. Nat. Hist., 
Y. 
Attus H. (retiarius), Jour. Bost. Soc. Nat. Hist., VI, p. 288. 
Attus H. (puerperus, sylvanus, retiarius), Occ. Pap. Bost. Soc. 
Nat. Hist., II, p. 64. 
Attus P. (agrestis), New or little known Attidse, p. 12. 
Plexippus P. (puerperus), Proc. Nat. Hist. Soc. Wis., p. 68. 
Flexippus P. (puerperus), Wis. Acad. Sciences, Arts and Let¬ 
ters, VII, N. A. Att., p. 33. 
Thiodina E. S., Ann. Soc. Eht. Bel. XLIV, p. 392. 
Thiodina E. S., Hist. Nat. Araign., 2me Ed., II, p. 458. 
Colonus F. O. P. C., Biol. Cent. Am., Arachn. Aran., II, p. 246. 
Thiodina B., Am. Nat., XXXIX, p. 322. 
The cephalothorax is high, rounded on the sides and widest 
behind the dorsal eyes. The ocular area is 1-4 wider than long, 
