1965] 
Redner and Dondale — Xysticus 
293 
with 5 teeth. Abdominal dorsum pale yellowish to off-white, with 
pattern composed of thin lateral black lines on anterior half and 4-5 
similar transverse lines posteriorly. 
Tibia of palpus with ventral apophysis flattened and bladelike, and 
bearing small basal lobe ; distal tegular apophysis flattened ; embolus 
not thickened at tip (Figs. 2, 4). 
Female: Total length (allotype) 5.21 mm.; carapace 2.61 mm. 
long and 2.46 mm. wide; femur II 2.32 mm. long. Structure and 
color essentially as in male, but femora I and II concolorous with other 
segments; abdominal pattern and carapace setation as in Figure 1. 
Epigynum with deep atrium and paired atrial sclerites as in Figure 
3; spermathecae as in Figure 5, each copulatory tube arising pos- 
teriorly and forming convoluted mass dorsal to anterior end of 
spermatheca. 
Range: Arizona. 
Type Locality: Holotype male and one paratype male from Portal, 
Cochise County, Arizona, July 19, 1964, J. A. Woods and V. Roth 
collectors. Deposited in the American Museum of Natural History, 
New York. 
Other Locality: Allotype female from 2 miles north of Rodeo, 
Arizona, June 12, 1957, Statham and Plimton collectors. Deposited 
in the American Museum of Natural History, New York. 
Diagnosis: X. kumilis most resembles X. bradti Gertsch, which 
is known only from males taken in the State of Chihuahua, and X . 
texanus Banks, a better-known species, from Nuevo Leon, Texas, 
Arizona, Colorado, and the southeastern United States. Both X. 
bradti and X . texanus are relatively small in size and weakly setaceous 
in carapace and legs. X. kumilis is distinct from these and all other 
known species of Xysticus in its low, pale, smoothly-convex carapace, 
in its abdominal pattern of thin black lines, and in details of the ex- 
ternal genitalia. The male palpus has a stout basal tegular apophysis 
with a small irregularity midway along its basal margin (Fig. 4), 
whereas in bradti and texanus this structure is slender and smoothly 
tapered. The distal tegular apophysis further differs from that of 
texanus in being flat and rounded in outline rather than slender and 
“heeled”, while the epigynal atrium is nearly circular instead of 
broadened, and the atrial sclerites are approximately ovoid instead 
of elongate and slender. 
Explanation of Plate 21 
Figs. 1-5. Xysticus kumilis sp. n. 1. Dorsal view of female. 2, 4. Male 
palpi. 3, 5. Female epigynum and spermathecae. 
