Metasternum alutaceous, roughly punctured, and clothed in long coarse hairs.

Abdominal sternites alutaceous and punctate with long coarse hairs thinly covering the

surface. Legs: Femora glossy, broad, flattened, and sparsely covered with short hairs.

Pro- and mesofemora about the same width throughout length. All tibiae slightly but

distinctly curved and dilated towards apex. Protibiae with short hairs along outer margin.

Meso- and metatibiae with long, stiff hairs along outer margin. Four tarsomeres, claw

tarsomere as long or almost as long as 2 tarsomeres preceding it. Median lobe: Sides

parallel and curving into a point, apex shaped like a spearhead (Fig. 6-3). In profile,

slightly curved from middle (Fig. 6-4). Median plate on surface slightly elevated. Basal

plate: Sides slightly rounded, apex with a very shallow concavity (Fig. 6-5).

 Female. External morphology identical to male.

 Geographic distribution. Sinaloa: nr. El Palmito (Fig. 6-11).

 Type material examined. The holotype, deposited in the CNCI, is a partially

disarticulated male specimen glued to a card with the following labels: 15 mi. W. El

Palmito, Sin. MEX. VII-29-64 H. F. Howden (printed) [white rectangular label]. The

allotype, deposited in the CNCI, is a female specimen glued to a point with the following

labels: 15 mi. W. El Palmito, Sin. MEX. VII-28-64 H. F. Howden (printed) [white

rectangular label]. One female paratype is labelled as follows: Mexico: Sinaloa, 8 mi. W

E. Palmito, 7-VIII-1964, coll. H. F. Howden (CNCI).

 Cybocephalus californicus Horn

 (Figs. 6-6-6-11)

Cybocephalus californicus Horn 1879: 320-321.

For a redescription of the species, see Smith and Cave (2006a).