l. Body of plate distinctly longer than broad; goblet cells of medium size, usually 17.5µ to 35µ or 40µ in diameter, appearing as medium sized punctuations on untreated specimens, but on the specimens treated with caustic potash they appear very distinct in outline, which is not circular; base of capitulum usually less than twice as broad as long, the postero-lateral angles always distinctly prolonged caudad. m. Trochanter I with distinct dorso-subterminal retrograde sharp, digitate spur; postero-lateral angles of capitulum pronouncedly prolonged caudal, 112µ to 160µ long; goblet cells attain 13µ to 40µ in diameter; type locality California. D. OCCIDENTALIS mm. Trochanter I with dorso-terminal blade; postero-lateral angles of capitulum with rather short prolongations. n. Stigmal plate small, goblet cells not exceeding 45 in the male or 100 in the female; scutum with little rust, coxa I with short spurs, the inner distinctly shorter than the outer. _D. parumapertus-marginatus_ nn. Stigmal plate larger; goblet cells over 70 in the male and over 100 in the female; coxa I with longer spurs, inner slightly shorter than the outer; scutum with considerable rust. D. VENUSTUS[F] ll. Goblet cells small, rarely exceeding 17.6µ, occasionally reaching 19µ in diameter; on untreated specimens they appear as very fine granulations, and on specimens treated with caustic potash they may be difficult to see, but their large number can be determined from the prominent stems of the goblets; surface of outline of the goblets distinctly circular; base of the capitulum usually less than twice as broad as long, the postero-lateral angle distinctly prolonged caudad; spurs of coxæ I long. _D. reticulatus_ and _electus_ (= _variabilis_?)