140 Rowland M. Shelley 



at 1/4 length into ledge or shelf on dorsal side, outer margin extending 

 beyond surface of ledge as translucent shield, tapering toward and 

 connecting with inturned lateral margin, stem of prefemoral process 

 continuing distad with lightly serrate margins, with broad, thickened, 

 irregularly convoluted projection from caudal surface, apical margin 

 slanting laterad, with perpendicular, marginally serrate lamina projecting 

 from dorsal surface lateral to midline. Acropodite arising on caudolateral 

 side of prefemur, looping around prefemoral process and curling onto 

 shelf, curling distad and terminating behind lateral extension of shield. 



Female from Skamania County, Washington — Body fragmented, 

 length unmeasurable, maximum width 5.9 mm, D/W ratio 71.4%. 

 Agreeing closely with holotype in structural details, except paranota 

 more strongly declined, creating appearance of more vaulted body. 

 Valves (Fig. 14) moderately large, moderately hirsute, medial corners 

 strongly elevated, subtending deep central depression. Receptacle small, 

 situated directly beneath or dorsal to valves on lateral side, hirsute 

 along ventral surface, extending slightly around caudal side of latter 

 but not around anterior side. 



Variation — As in C. armata, the size and degree of irregularity 

 of the distal projection of the prefemoral process varies, being larger 

 and more convoluted in some males. The sides of the projection occasion- 

 ally have variable teeth that project above the flattened distal surface, 

 which may be level or slant downward. The shield curves distad and 

 continues for varying distances beyond the shelf, connecting with the 

 inturned lateral margin. In some males, this continuation extends to 

 the distal extremity of the prefemoral process, where it is very narrow 

 and indistinct; in others, the continuation ends near the level of the 

 distal projection, and the inward curving lateral margin distal to this 

 point is separate. 



Ecology — The specimen from Mason County was taken from 

 sabal/alder litter at the edge of a marsh; that from Grays Harbor 

 County was found on a canyon wall; and those from Ape Cave, Skamania 

 County, were recovered from a pitfall trap just inside the main entrance. 



Distribution — Washington west of the crest of the Cascade Mountains. 

 Specimens were examined as follows: 



WASHINGTON: King Co., Seattle, M, 9 April 1936, E. F. Dailey 

 (UWBM); and Snoqualmie Falls, M, 19 May 1933, M. H. Hatch (FSCA). 

 Pierce Co., Puyallup, M, 2 May 1933, W. W. Baker (NMNH) TYPE 

 LOCALITY. Mason Co., Dennie Ahl Seed Orchard, ca. 5 mi (8 km) 

 W Potlach, 47.379«N, 123.257-259°W, M, 6 May 1986, R. Crawford 

 (UWBM). Grays Harbor Co., along Canyon River, ca. 7.0 mi (11.2 

 km) WNW Matlock, nr. Mason Co. line, 47.262°N, 123.526°W, M, 29 



