1906.] NATURAL SCIENCES OF PHILADELPHIA. 495 



of coxse IV running into the genital opening slightly in front of the 

 middle; a large tectopedium behind coxse I. Legs very slender; tarsi I 

 and II slightly longer than tibiae ; tarsi III and IV much shorter than 

 those tibiae; three spine-like bristles below tarsi III and IV, and those 

 on these tibiae are rather short; three equal claws. 



Length LI mm. 



One specimen from Black Mountain, N. C. (Beutenmiiller.) 



Liacarus abdominalis n. sp. 



Color, red-brown, legs paler. Cephalothorax, with a broad sub- 

 median lamellae, nearly touching before tip, their apical fourth free, 

 and tipped by a long bristle, a long, low outer ridge or lamella, reaching 

 nearly to tip of head and ending with a short bristle; superior bristles 

 very long, erect, simple; pseud ostigmatic organ of moderate length, 

 swollen toward tip and then tapering to a fine point. Abdomen elong- 

 ate, smooth, no hairs above; venter smooth; fine hairs each side of anus, 

 and a pair behind; genital apertm-e very small, fully three times its 

 length in front of anus, the latter more than twice as long, and twice as 

 broad as the genital opening; sternal plate with three complete fur- 

 rows. Legs slender, the hind pair do not reach tip of abdomen; a 

 large tectopedium behind coxa I; tarsi I and II as long as tibiae, tarsi 

 III and IV much shorter than tibiae; all the hairs are fine; three equal 

 claws. 



Length 1 mm. 



One specimen from Claremont, Cal. (Baker.) 



Liacarus frontalis n. sp. 



Pale yellowish brown, legs paler. Cephalothorax with two low 

 lamellae each side, the submedian pair nearly meet somewhat beyond 

 middle of cephalothorax, and are tipped with long, porrect bristles, the 

 marginal lamella? reach nearly to tip of head and end in short bristles ; 

 the superior bristles are long, simple, and erect; pseud ostigmatic 

 organ rather long, fusiform, its tip acute. Abdomen nearly circular, 

 not very high, smooth, without hairs; venter smooth; genital opening 

 circular, one and one-fourth its length in front of much larger anal 

 opening, the latter evenly elliptical ; sternal plate with three transverse 

 lines, all complete, hind margin of coxae IV running into middle of 

 genital opening. Legs slender, with simple hairs; tarsus I shorter 

 than tibia I, tarsus IV nearly as long as tibia IV; three equal claws; 

 mandibles large and stout, palpi very distinct. 



Length .5 mm. 



From Falls Church. Va. 



