The Chonaphini 183 



Gardner (UCD) TYPE LOCALITY; and 22 mi (35.2 km) W Red Bluff, 

 2M, 3F, 22 December 1966, J. S. Buckett, M. R. Gardner (UCD). 

 Butte Co., Forest Ranch, M, 27 April 1991, R. M. Shelley (NCSM); 

 and Chico, 4M, 3F, 7 May 1968, T. Komo, R. Wilkey, W. Wiard 

 (UCD). Placer Co., 1 mi (1.6 km) E Auburn, 4M, 28 January 1965, 

 M. R., R. C, J. L., B. W., and K. B. Gardner (UCD). El Dorado Co., 

 cove along CA hwy. 49, 1 mi (1.6 km) S Placer Co. line, 4M, juv., 27 

 April 1991, R. M. Shelley (NCSM); and nr. confluence of North & 

 Middle Forks, American R., M, 26 March 1965, J. S. Buckett, M. R. 

 Gardner (UCD). 



The following literature records of Hybaphe tersa from Shasta 

 County, in close proximity to each other, are believed to refer to S. 

 sinuata and are indicated by the open star in Figure 68. They are the 

 basis for Chamberlin and Hoffman's citation (1958) of Shasta County 

 for H. tersa and for Hoffman's citation (1979) of California for Hybaphe. 

 The Placer County record is of "an undescribed species of Hybaphe'' 

 (Buckett and Gardner 1968). 



CALIFORNIA: Shasta Co., Mt. Brock (Causey 1954fl); Low Pass 

 Cr. (Causey 1954^, 1955, Buckett 1964); and Madison Cr. (Causey 

 1955, Buckett 1964). Placer Co., American River Canyon near Auburn 

 (Buckett and Gardner 1968). 



Remarks — Buckett and Gardner (1968) also recognized that this 

 species occurs in Shasta and Tehama counties. 



Selenocheir arcuata, new species 

 Figs. 59-63 



Type specimens — Male holotype and 9 male and 2 female paratypes 

 (UCD) collected by C. Smith, J. Clover, and F. Ennik, 15 May 1972, 

 at Black Rock Camp along Mill Creek, 18.8 mi (30.0 km) northeast 

 of Red Bluff, Tehama County, California. One male paratype deposited 

 in NCSM. 



Diagnosis — Acropodite blade-like basally, becoming subacicular 

 apically, directed anteromediad, subtending broad, poorly defined arc, 

 distal curvature broad, indistinct, distal extremity either uncinate or 

 with short bisinuate section. 



Color in life — Unknown. 



Holotype — Length 30.8 mm, maximum width 4.8 mm, W/L ratio 

 15.6%, D/W ratio 68.8%. 



Somatic features agreeing with those of S. sinuata, with following 

 exceptions: 



Width across genal apices 3.2 mm; interantennal isthmus 0.9 

 mm. Relative lengths of antennomeres 2>3>6>4>5>1>7. Genae with 



