Erwiniana ampliata (Bates 1884)

Xystosomus ampliatus Bates, 1884:290

DESCRIPTION.—Form: As in X. gruti, but larger. Easily distinguished from X. gruti by the overall rufous color, less impressed lateral striae, and the broadly explanate sides of pronotum and elytra.

Color: Body rufous; pronotum and elytra dorsally with slight iridescence; appendages testaceous.

Head: As in X. gruti except frontal furrows less impressed, closer to eye margin; eyes very large and prominent.

Pronotum (Figure 7): As in X. gruti except explanations broader (W/L, 1.63; range, 1.56–1.68; 3 specimens).

Elytra: As in X. gruti except lateral striae less impressed than discal ones and explanations broader.

Microsculpture: As in X. gruti.

Secondary sexual characters: Male unknown. Female genitalia characteristic of the species group.

Size: Three specimens: length, 4.8–5.5 mm; width, 2.2–2.4 mm.

NATURAL HISTORY.—Adults were collected in August and January. No teneral specimens were seen. Nevermann recorded a specimen in “fermenting plant juice on fresh cut wood, August” and a specimen “at night on dry wood of Sapotacca [?Sapotaceae], January.”

LOCALITY RECORDS (Figure 69).—I have seen four specimens from the following localities:

CENTRAL AMERICA: COSTA RICA: Hamburg Farm at Reventazón (USNM). PANAMA: “Panama” (MHNP); Bugaba (BMNH).