DISTRIBUTION:

Eubergia sinjaevorum (wingspan: males: 34-40mm; females: ? mm) flies in
Bolivia: Santa Cruz: road Santa Cruz - Cochabamba, -18.1272, -64.1061, Pampa Grande, collected by Ron Brechlin, 2009-02-26. Mirror;
and possibly in northwestern Paraguay: Boqueron.

I believe the head and thorax of this species are dark grey as compared to white in most other species in the genus.

Compared to most other members of this genus, the wingspan is small and the forewing is slightly falcate while that of all others is more rounded. Just below the slight indentation of the forewing outer margin below the apex, the outer margin runs almost straight to the turn near the anal angle instead of of being obliquely convex. The broad white pm line is slightly preapical. The white am line is relatively thin.

The hindwing is grey with a reddish tint in the basal area, The cell spot is dark and pronounced, and the darker premarginal bars on both sides of the red wing veins are shorter than in most other species.

FLIGHT TIMES AND PREFERRED FOOD PLANTS:

Specimens have been taken in February-March and December in Bolivia (Mirror) at elevations of 1100-1830m. There may be additional flight months.

Eubergia boetifica (possibly?? a female Eubergia sinjaevorum),
Boqueron, Paraguay, courtesy of Ulf Drechsel

Based on location and yellow in cell markings, I (Bill Oehlke) think the female moth directly above is more likely a female of E. sinjaevorum.

ECLOSION, SCENTING AND MATING:

Males use their more highly developed antennae to seek out females who release an airbourne pheromone into the night sky.

EGGS, LARVAE, COCOONS AND PUPAE:

Eggs are deposited in clusters of 6-40+ on hostplant twigs. Larvae have urticating spines and are gregarious, especially in the early instars.

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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Some of the early describers/namers chose genus and species names indicating some character of the insect, but more often, they simply chose names from Greek or Roman mythology or history.

Those species names which end in "ensis" indicate a specimen locale, and those which end in "i", pronounced "eye", honour a contempory friend/collector/etc.

I do not know the source of the genus name "Eubergia" chosen by Bouvier in 1929.

The species name sinjaevorum is honorific for the couple, Viktor and Svetlana Sinjaev, who also collected this species in Santa Cruz, Bolivia.