116 Journal New York Entomological Society. [Voi. xii. 



Sidusa Peckham. 



This genus is near Mavia Koch. In our species the eye region is 

 a little broader in front than behind, and occupies scarcely one third 

 of the length of the cephalothorax. There are but 3-3 spines under 

 tibia I and the basal one of inner series is near base ; metatarsus IV 

 heavily spined near base, middle, and tip ; spines on patellae III and 

 IV ; and cox?e I rather widely separate. Astia morosa Peckham falls in 

 this genus, and has an epigynum extremely similar to that of certain 

 Mexican forms. Two other species are known to me. 



Sidusa arizonensis, new species. 



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 

 yellowish, blackish at bases and tips of the joint. Sternum pale brownish ; 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. 

 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 (Townsend). 



Sidusa borealis, new species. 



Eye-region black, concave behind, thoracic part pale reddish brown, darker on 

 posterior part ; clypeus brown ; mandibles brown ; legs yellowish brown ; leg I rather 

 darker, and all femora darker than other joints, no bands. Abdomen black at extreme 

 base, then a curved transverse whitish band (not very clear) ; behind in the middle 

 is a broad pale stripe to tip (not very distinct) ; and on each side is a broad black stripe 

 containing two white dots, one beyond 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 spine, as in the genus. Male palpi very slender, 

 the tibia longer than tarsus, and clothed with long white hair, tarsus on outside with 

 black hair; palpal organ simple ; a short spur at tip of tibia. Length, 5-6 mm. 



Two males ; one from Ithaca, N. Y., the other from Falls Church, 

 Va. 



Icius texanus, new species. 



Cephalothorax dark red-brown, black in eye-region, clothed with yellowish 

 scales, and white ones over first eye-row ; a white line along the lower margin. Ab- 

 domen a uniform pale brown above, with a nanow white line around base and sides, 

 clothed with white scales. Legs pale yellow, front pair more brownish, all un- 

 marked. Sternum pale brown ; venter pale yellowish. Cephalothorax one and one 

 half times as long as broad, broadest behind eye-region ; latter broader behind than 

 in front, occupying almost two fifths of cephalothorax ; eyes of second row one half 



