Pericompsus (Pericompsus) nevermanni (Darlington 1934)

Pericompsus nevermanni (Darlington)

Tachys nevermanni Darlington, 1934:160. [Holotype male in MCZ. Type-locality: Hamburg Farm, near Port Limon, Costa Rica.]

Tachys (Pericompsus) nevermanni Darlington, 1934:160.

DESCRIPTION.—Form (Figure 1): Moderately elongate and narrow with medially constricted elytra. Easily distinguished from all other Pericompsus members by the huge fovea of interneur 8.

Color: Shiny testaceous, midventer rufous, elytral cloud rufopiceous, appendages testaceous.

Head: Across eyes slightly narrower than width of pronotum; frontal furrows short and deeply impressed, not prolonged posteriorly beyond mideye level; eyes medium sized and prominent.

Pronotum (Figure 1): Nearly quadrate, sides shallowly sinuate in basal half; base lobed at middle; hind angles acute, slightly prominent; side margins beaded, not reflexed; disc slightly convex.

Elytra: Each elytron with 6 punctate interneurs; punctures small and separated longitudinally by about their own diameter; all rows effaced in apical third, interneur 7 effaced externally throughout, interneur 8 well impressed, sulcate, and foveate just posterior to middle; fovea huge, wider than elytral explanation; humeral margin angulate at base, not connected with base of interneur 4; side margins narrowly explanate, not serrate-setulose in basal fourth; chaetotaxy as in P. ephippiatus; plica long and well developed externally.

Microsculpture: Moderately impressed, nearly isodiametric reticulation on frons, pronotum, and elytra.

Genitalia: Male (Figure 70) (3 examined); female characteristic of ephippiatus group (1 examined).

Size: Length, 2.32–2.80 mm; width, 0.96–1.12 mm; 10 specimens measured.

NATURAL HISTORY.—Specimens were collected in February, March, May, and July; several, but not all, March specimens were teneral. One specimen was collected at light. The flight wings of all specimens are fully developed; thus, the beetles probably fly. Nevermann collected these beetles “auf Sandbank.”

LOCALITY RECORDS (Figure 74).—I have seen 22 specimens, all paratypes (MCZ, USNM), from Hamburg Farm near Port Limón, Costa Rica.