1901.] NATURAL SCIENCES OF PHILADELPHIA. 577 



DICTYNID^. 

 Dictyna arundinacoides Kcyserlins. 



I)i('ti/n<( ((ruiuUnacoides Keyserliiig, Verb, zool.-bot. Ges. Wien, 1883, 

 p."6«5. 



Several specimens from Beulah. A pair from top of Las Vegas 

 range, 11,000 feet, last of June. 



Dictyna texana Banks. 



Dktiina texana Batiks, Proc. Calif. Acad. Sci. (3), Vol. I, p. 233 



(1898). 



Two immature specimens from Mesilla Park 

 Dictyna sii. 



One female of a small species from Las Cruces. It is much like 

 D. suhlata, but different. 



Titanceca americana Emerton. 



Titanoeca americana Emerton, Trans. Conn. Acad., VII, p. 453 (1888) 



One broken specimen from Las Vegas, at the limestone ledges 

 by Gallinas river, January. Does not appear to differ from Eas- 

 tern form. 

 Lethia trivittata n. sp. 



Cephalothorax dark red -brown, with three stripes of white hairs 

 on the head uniting behind at the dorsal groove; mandibles red- 

 brown; sternum and legs more yellow-brown, paler toward tips; 

 abdomen grayish white above, with a broad median brown stripe 

 with serrated margins. Legs quite long and hairy, no spines ; 

 mandibles of male long and slightly concave; palpus of male short, 

 the tibia with a plate-like projection below near the tip, palpal 

 organ simple, a long stylet on outer side, bent over at tip; epigy- 

 num shows two transverse cavities in front, and two smaller 

 oblique cavities behind. Posterior eye-row straight, P.M.E. 

 fully their diameter apart, about as far from the equal P.S.Li.; 

 A.M.E. equal to P.M.E., about their diameter apart, and closer 

 to the equal ^.S. E. ; quadrangle of M. E. broader than high. 



Length ? 6 mm.; d^ 4. 2 mm. 



One pair from Albuquerque (Soltau). 



THERIDIID^. 

 Theridium neomexioanum n- ;^i'. 



Cephalothorax pale yellowish, with a marginal black line, head 

 with four reddish brown lines, converging back from the eyes and 

 37 



