3(2'). Antennomere 3 slightly shorter than 4 and 5 combined; male bicolored with head,
 prothorax, and mesosternum yellow or tan, rest of body black (Fig. 4-29); basal
 plate coming to a rounded point (Fig. 4-26); median lobe as in Figs. 4-24, 4-25 .....
 ......... ....................................... .......... ....... .. nipponicus Endrody-Y ounga

3'. Antennomere 3 as long or longer than 4 and 5 combined; male with head,
 prothorax and mesothorax black or dark brown ............................................4

4(3'). All legs and antennae brown or black; elytral apices with a large and wide
 impunctate area of yellowish translucence; male basal plate evenly rounded,
 without a protuberance (Fig. 4-8); median lobe as in Figs. 4-5-4-7 ...................
 ..................................................................................... californicus H orn

4'. At least profemora yellow or amber and usually antennae amber or tan;
 translucent impunctate area at the apices of elytra much smaller; male basal plate
 with a protuberance in the middle (Fig. 4-21) median lobe as in Figs. 4-18-420......
 ................... ...... .................................... ........ .... .......... ...... .. n ig ritu lus L eC onte

 Cybocephalus californicus Horn

 (Figs. 4-3-4-9)

Cybocephalus californicus Horn 1879: 320-321.

 Diagnosis. Male and female are black, brown, or aeneous. Antennal club is smaller

than the eye and truncate or slightly emarginate at the apex, unlike the 11th antennomere

of C. randalli, which is rounded. Each antennomere of the club is distinctly separated,

forming a serrated margin, unlike C. kathrynae which has a smooth club margin. Apices

of the elytra have a large, wide area of yellowish translucence that is without punctation,

which distinguishes this species from C. nigritulus. In males, the basal plate and median

lobe are easily distinguished from those of all other species.

 Redescription. Male. Form: Elongate oval; contractile; strongly convex

dorsally. Length: 0.95-1.30 mm (measured from apex of clypeus to apex of elytra);

breadth: 0.85-1.20 mm (measured at base of elytra). Color: Head, thorax, elytra and

underside black with surface sometimes aeneous, lateral margin of pronotum and