Centipede Subfamily Plutoniuminae 83 



and southward to the Mexican border, possibly extending along the 

 coast to Ventura County. Riverside County and Santa Cruz Island, Channel 

 Islands National Park (UCR). New Records: Inyo Co., 4.8 km (3 mi) 

 E Big Pine, Saline Valley Rd., 1 spmn., 11 June 1967, W. J. Ball, 

 H. E. Evans (NMNH); Saline Valley, Grapevine Rd. Sta. 32, 1 spmn., 

 7 May 1960, B. Banta (CAS); and 40 km (25 mi) S Saline Valley, 1 

 spmn, 29 April 1975, A. R. Hardy (CDFA). Riverside Co., Whitewater 

 Cyn., 1 spmn., 15 February 1959, I. Newell (AMNH); and Palm Springs, 

 nr. Taquitz Cyn., 4 spmns., 23 March 1965, D. Yang (CAS). Stanislaus 

 Co., Del Puerto Cyn., ca. 28.8 km (18 mi) W Patterson, 2 spmns., 10- 

 11 April 1990, E. I. Schlinger (UCB). 



Remarks. Theatops posticus was collected at Appomattox Court 

 House, Virginia, on the very day of the surrender there of Gen. Robert 

 E. Lee's Confederate army, 9 April 1865, by an unknown member 

 of the surrender parties (Shelley 19906). 



Apparently, T. posticus and T. spinicaudus can occur syntopically, 

 because some preserved samples, ostensibly collected at one place on 

 one date, contain both species. 



Theatops californiensis Chamberlin 

 Figs. 13-18 

 Theatops californiensis Chamberlin, 1902:41. Kevan, 1983:2945. 

 Theatops erythrocephalus (nee C. L. Koch): Kraepelin, 1903:66-67, 



Fig. 26. 

 Theatops erythrocephalus californiensis: Chamberlin, 1911:472. 

 Theatops erythrocephala (nee C. L. Koch): Attems, 1930:251-252, Figs. 

 331-335. Kevan, 1983:2945. 



Type specimens. Three syntypes (NMNH) collected by E. Garner 

 in the summer of 1901 at Quincy, Plumas County, California. 



Diagnosis. Ultimate tergite usually with incomplete, median suture, 

 running from anterior margin to just short of caudal edge; ultimate 

 legs without dorsal distomedial prefemoral spurs; ultimate prefemora 

 and femora usually with four strong, distinct ventral spurs, one on 

 each podomere, rarely with three or fewer spurs; caudal coxopleurae 

 with medial borders strongly elevated and extended caudad, usually 

 apically acuminate with blackened terminal spurs (Figs. 13-18). 



Variation. Occasional exceptions exist to the typical pattern of 

 four ventral spurs, one on each caudal prefemur and femur (Fig. 13). 

 A specimen from Brush Creek, Butte County, California, exhibits three 

 spurs, the right prefemur lacking the structure (Fig. 14). An individual 

 from 19.2 km (12 mi) E Buck Meadows, Tuolumne County, has two 

 spurs, lacking those on the left prefemur and femur (Fig. 15), and 



