I feel the moth image above from Ambua Lodge is more likely a yellower version of Syntherata engaiana than it is of Syntheratas okapiana primarily because of location. It is actually somewhat intermediate between the holotypes of the two species and might even be something undescribed as the mountainous terrain with deep ravines and gorges in the highlands seem to isolate Papua New Guinea species. Shirley's images above and below are from elevations of 2100m which is higher than the thus far known elevations of engaiana or okapiana. The orange moth below is a real ? Bill Oehlke.

Syntherata engaiana/okapiana/undescribed male, Ambua Lodge, east of Tari, Southern Highlands, Papua New Guinea,
2100m, June-July 2012, courtesy of Shirley Sekarajasingham, digital repair and tentative id by Bill Oehlke.

TAXONOMY: Superfamily: Bombycoidea, Latreille, 1802 Family: Saturniidae, Boisduval, [1837] 1834 Subfamily: Saturniinae, Boisduval, [1837] 1834 Tribe: Saturniini, Boisduval, [1837] 1834 Genus: Syntherata, Maassen, 1873

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DISTRIBUTION:

Syntherata engaiana (wingspan: males: 110mm; females: // forewing length: males: 56-57mm; females: larger) flies in
Papua New Guinea: Enga Province, west of Wabag at elevations of 1600m.

This species (at least the type specimen) is heavily marked with brown: the entire median area is almost completely solid brown with a wide, dentate, brown post median line, a wide, brown subterminal line and a lightly notched brown marginal band, all against a clear yellow ground colour.

FLIGHT TIMES AND PREFERRED FOOD PLANTS:

Specimens were collected May 1990 by a local collector. I suspect there are additional flight months.

ECLOSION, SCENTING AND MATING:

Females extend a scent gland from the tip of their abdomens to "call" the males. Males use their antennae to hone in on the airbourne pheromone.

EGGS, LARVAE, COCOONS AND PUPAE:

White, ovate eggs are deposited in rows of 8-12 on hostplant foliage.

Larvae pupate in stiff oval cocoons spun up among food-plant or nearby vegetation.

Larval Food Plants

It is hoped that this alphabetical listing followed by the common name of the foodplant will prove useful. The list is not exhaustive. Experimenting with closely related foodplants is worthwhile.

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