594 Wisconsin Academy df Sciences, Arts and Letters. 
very distinct); and on each side is a broad black stripe contain¬ 
ing two white dots, one behind middle, and the other (smaller) 
close to tip. Sternum and venter pale. Abdomen pointed at 
tip not depressed. A row of bristles over first eye-row. Leg 
I not much thickened, tibia I fully three times as long as 
broad; all legs with many stout spines, as in the genus ; x male 
palpi very slender, the tibia longer than tarsus, and clothed with 
long white hair, tarsus on outside with black hair; palpal or¬ 
gan simple; a short spur at tip of tibia. Length, 5-6 mm. 
Two males, one from Ithaca, bf. Y., the other from Falls Church, 
Va.” 
We have copied Mr. Banks description; he writes to us that 
this species has “one simple distinct tooth back of falx-claw.” 
SIDUSA ARIZONENSIS B. 1904. 
1904. SIdusa arizonensis J B., Journ. N. Y. Entom. Soc. XII, p. 116. 
“Cephalothorax dark brown, scarcely paler behind, clothed 
with white and black hairs, a row of white over first eye-row, 
more golden below dorsal eyes. Abdomen black, with white and 
black appressed hairs, more golden around base. Legs pale yel¬ 
lowish, blackish at bases and tips of joint. Sternum pale brown¬ 
ish; venter whitish, unmarked. Cephalothorax about one and 
one-half as long as broad, broadest in middle, not depressed; eye- 
region one-third broader than long, a little broader in front than 
behind. Abdomen longer than cephalothorax, about one and two- 
thirds as long as broad, not depressed. Leg I not much thickened; 
spines as in the genus 1 . Epigynum shows two large contiguous 
nearly circular cavities, in the inner basal part of each is a 
rounded reddish elevation. 
Length, 5 mm.” One female from Arizona. 
We have copied Mr. Banks description. “One simple dis¬ 
tinct tooth back of falx-claw.” 
1 Tibia II 3-3 
