Pericompsus (Pericompsus) hirsutus Schaum 1863

Pericompsus hirsutus Schaum, 1863:88

DESCRIPTION.—Form (Figure 145): Short; forebody narrow, narrower than elytra, subpedunculate; elytra slightly inflated, with broad marginal explanations, highly convex.

Color: Rufotestaceous, shiny; midventer and elytral cloud rufous; tibial bases, margins of elytral cloud, and elytral apices infuscated; appendages testaceous, except almost white articles 7–11 of antennae.

Head: Across eyes slightly narrower than width of pronotum; two supraorbital setae per eye; frontal furrows moderately impressed and evenly arcuate, each extended to posterior margin of eye; eyes large and prominent.

Pronotum (Figure 145): Strongly subcordate, sides sinuate and strongly constricted in basal half; base broadly lobed; hind angles acute, prominent; side margins not reflexed, each with three setigerous pores; disc strongly convex.

Elytra: Each elytron with 6 punctate interneurs; punctures moderately large and coarse and separated longitudinally by twice their own diameter or more; all rows effaced at apical third; intervals plurisetose; interneur 7 effaced externally throughout; interneur 8 well impressed and foveate at middle; fovea very large, twice as large in diameter as width of the elytral explanation; humeral margin strongly rounded at base, not connected to base of interneur 4; side margins setose from base to apex, setae twice or more as long as width of elytral explanation, side margin serrate in basal fourth; chaetotaxy Eo–1a, 2a, 3a, 4d, 5a, 6a, 7, 8b, and Ed–1, disc plurisetose, 7b, 8; plica short and well delevoped externally.

Microsculpture: Mostly effaced except at extreme elytral base, where it is isodiametric reticulation.

Genitalia: Male (Figure 148) (1 examined); female as in ephippiatus group (12 examined).

Size: Length, 2.12–2.68 mm; width, 0.92–1.08 mm; 10 specimens measured.

VARIATION.—The shape and colors of the elytral cloud are somewhat variable. In some specimens, the base of elytral interval 5 is piceous from the elytral cloud to nearly the base of the elytron. In others, this interval has an isolated spot near the humerus; yet in others the interval is testaceous anterior to the cloud. The same color patterns are found in P. elegantulus (see above). The variation described above occurs in one population sample.

NATURAL HISTORY.—Specimens were collected in March, April, and October; none were teneral. One specimen is labeled “at light”; the specimens are fully winged and, presumably, fly.

LOCALITY RECORDS (Figure 150).—I have seen 156 specimens from the following localities:

SOUTH AMERICA: BRAZIL: Ceara State, Fortaleza (CAS, BMNH, MCZ, MHNP, UASM, USNM); Mato Grosso State, “Jacare P. N. Xingu” (USNM), Rio Caraguata (MCZ, USNM); Rio de Janeiro State, Rio Janeiro (HUB). PERU: Loreto Department, Yurac, 67.0 miles east of Tingo Maria (CAS).