Spiders and Their Near Relatives 



Tracbyrhinus marmoratus (T. mar-mo-ra'tus). — This species 

 was described from New Mexico. It differs from the preceding 

 in having the coxae pale spotted with brown and in having the 

 legs mostly pale. 



Genus LEURONYCHUS (Leu-ron'y-chus) 



Similar in most respects to Leiobuniim, but with the palpal 

 claw smooth, and without the lateral rows of teeth on the coxae. 

 Two species have been found in the Far West. 



Leuronychus pacificus (L. pa-cif'i-cus). — The body is marked 

 with a brown dorsal stripe; the patellae of the legs are brown lined 

 with white. This species occurs in California and in Washington. 



Leuronychus parvulus (L. par'vu-lus). — This species differs 

 from the preceding in lacking the dorsal stripe and in that the 

 patellae are not lineate. It occurs in Washington. 



Genus LEIOBUNUM (Lei-o-bu'num) 



In this genus the cuticula is soft or subcoriaceous. The 

 anterior and lateral borders of the carapace are smooth. The 

 eye-tubercle is relatively small, smooth, or rarely provided with 

 small, slightly distinct tubercles; it is widely separated from the 

 anterior border. The legs are very long and slender; the fourth 

 pair are much shorter than the second pair. The palpal claw is 

 denticulate. 



The genus Leiobunum is the largest of this order in our fauna, 

 including sixteen species. The males are separated by Banks 

 ('01) as follows: 



A A distinct spur on the femur of the palpus; dorsumyellowish, 



without stripe; trochanters concolorous with the coxae. 



Occurs in the Northern States. Leiobunum calcar 



\A. Without a spur on the femur of the palpus. 



B. Palpus, except the tarsus, mostly black. 



C. Dorsum dark, often with two large pale spots behind; 



trochanters usually pale. Occurs on the West coast. 



Leiobunum exilipes 



CC. Dorsum pale yellowish, no stripe; trochanters and 



bases of legs black. Occurs in the Eastern States. 



Leiobunum nigropalpi 



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