Xylophanes isaon by John Vriesi.

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TAXONOMY: Family: Sphingidae, Latreille, 1802 Subfamily: Macroglossinae, Harris, 1839 Tribe: Macroglossini, Harris, 1839 Genus: Xylophanes Hubner [1819] ........... Species: irrorata Boisduval, [1875]

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DISTRIBUTION:

Xylophanes isaon moths fly in
southeastern Brazil (specimen type locality) and
Paraguay: Caaguazu, (possibly Caazapa and Itapua (WO??));
Argentina: Misiones.

Theretra olivacea Rothchild, 1894, Brazil, is the same as Xylophanes isaon.
f. nanus Raymundo, 1932, Brazil, is the same as Xylophanes isaon.

"Thorax with a grey medial line, widening posteriorly, and continued onto the abdomen as two widely separated, not very distinct bands, each bordered dorsally by a series of sometimes interconnected dots and with a distinct brown medial line. Tegula olive green with a golden-yellow medial line. Outer spur of midtibia equal to the inner. Forewing upperside reminiscent of Cechenena minor; ground colour buff with olive green bands and lines; first to third postmedian lines distinct but disappearing distal to Rs4 and basal to 1A+2A, first postmedian heavier than the other two; fourth postmedian line strongest, running almost straight from the inner margin to the apex; fifth postmedian line diffuse, running parallel to fourth. Hindwing upperside basally black; median band broad, pinkish-orange, basal and distal edges even." CATE

FLIGHT TIMES:

Xylophanes isaon adults probably brood continuously.

ECLOSION:

Pupae probably wiggle to surface from subterranean chambers just prior to eclosion.

SCENTING AND MATING:

Females call in the males with a pheromone released from a gland at the tip of the abdomen. Males come in to lights very readily, but females are seldom taken in that way.

EGGS, LARVAE, PUPAE:

Larvae probably feed on Psychotria panamensis and Psychotria nervosa and other members of the of the Rubiaceae family and on Pavonia guanacastensis of the Malvaceae family.

Moths emerge approximately one-two months after larvae pupate.

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