Geographic distribution. Tamaulipas: Tampico (Fig. 6-41).

 Type material examined. The lectotype, deposited in the BMNH, is a male

specimen glued to a card with the following labels: LECTO-TYPE (printed) [white

circular label with a purple outer margin] / Tampico (printed) 18-12 (handwritten) [white

rectangular label] / E. A. Schwarz Collector (printed) [white rectangular label] / U.S. Nat.

Mus. 1913-253 (printed) [upside down white rectangular label] / Cybocephalus schwarzi

Ch. (handwritten) [white rectangular label] / LECTOTYPE Cybocephalus schwarzi

Champion Det: Trevor Smith (printed) [red rectangular label]. While this specimen is a

syntype, prior to this publication it was not a valid lectotype, despite the round lectotype

label placed on the specimen, because this designation was never published. A

paralectotype is labelled as follows: Mexico: Tamaulipas, Tampico, 14-?-1912, coll. E.

A. Schwarz (1 Y, BMNH).

 Cybocephalus New Species 4

 (Figs. 6-33-6-36, 6-41)

 Diagnosis. Male and female are dark brown. The antennal club is smaller than the

eye and the terminal antennomere is truncate (Fig. 6-33), unlike C. aciculatus and C.

randalli, and wider than long, unlike Cybocephalus new species 3. In males, the basal

plate (Fig. 6-36) and median lobe (Figs. 6-34 and 6-35) are easily distinguished from all

other species.

 Description. Male. Form: Elongate oval; contractile; strongly convex dorsally.

Length: 1.1 mm (measured from apex of clypeus to apex of elytra); breadth: 0.9 mm

(measured across elytral humeri). Color: Head, thorax, elytra and underside dark brown,

lateral margin of pronotum and posterior margin of elytra translucent; legs and antennae

brown or black. Head: Broad and convex, clypeus produced, narrow, and slightly