Aptostichus hesperus (Chamberlin, 1919). 188 sternal sigilla pattern (indicated by circled area, labium at top of photograph; MY2526)) 189 line drawing of rastellar spine pattern for Aptostichus hesperus and other Hesperus group species 190 cleared spermathecae, specimen from San Bernardino Co., Yucaipa (MY2526) ; scale bar = 0.1mm 191 photograph of live specimen from Riverside Co., Winchester(MY2496).