Pericompsus (Pericompsus) tetraphalarus Erwin 1974

Pericompsus tetraphalarus

TYPE-LOCALITY.—El Cidral, about 100 kilometers northeast of Santa Cruz, Bolivia.

TYPE-SPECIMEN.—The unique holotype female is in MCZ. It was collected by R. Golbach in 1962.

DESCRIPTION.—Form (Figure 110): Similar to P. histrionellus, but easily distinguished from members of that species by the well-impressed microsculpture, white elytral spots, and the infuscated tibial base.

Color: Rufotestaceous, venter rufous at middle, elytral cloud rufous, outlined in part with piceous and in part with white, appendages testaceous except piceous base of tibiae.

Head: Across eyes subequal to width of pronotum; frontal furrows well impressed and evenly arcuate, each extended to posterior margin of eye; eyes very large and prominent.

Pronotum (Figure 110): Strongly subcordate, sides sinuate and strongly constricted in basal half; base broadly lobed; hind angles acute, prominent; side margins not reflexed; disc moderately convex.

Elytra: Each elytron with 6 punctate interneurs; punctures contiguous and more or less striate; all rows entire, well impressed throughout, interneur 8 well impressed, and foveate just anterior to middle; fovea large, slightly wider than elytral explanation; humeral margin strongly rounded, almost angulate at base, feebly connected to base of interneur 4; side margins broadly explanate, minutely setulose (not serrate) in basal fourth; plica long and well developed externally.

Microsculpture: Strongly impressed isodiametric reticulation over entire dorsal surface.

Genitalia: Male unknown; female not dissected.

Size: Length, 2.36 mm; width, 1.00 mm, the type measured.

NATURAL HISTORY.—The single known specimen was collected in January; it was not teneral.

ETYMOLOGY.—Greek adjectives tetra, meaning “four,” and phalaros, meaning “white-spotted,” refer to the four white spots on the elytra.

LOCALITY RECORDS (Figure 118).—I have only seen the type from El Cidral, about 100 kilometers northeast of Santa Cruz, Bolivia.