Amastus thermidora Dognin


 Family: Erebidae

Subfamily: Arctiinae

Tribe: Arctiini

Subtribe: Phaegopterina

Host plants:

  • Erato polymnioides (Asteracae)
  • Miconia sp. (Melastomataceae)





Collection site: Various, Napo Province

Male (dorsal view)


Male (ventral view)

Photos & Determinations of adults: Suzanne Rab Green
Photos of immatures: CAPEA collections




Caterpillar common name:



Caterpillar behavior & description:

 The larvae of this species are solitary feeders


Rearing results and development time:



Host plants:

  • Erato polymnioides (Asteracae)
  • Miconia sp. (Melastomataceae)







Collection sites:

Caterpillars were collected inside primary forests, partially reforested pastures and next to roads along an altitudinal transect from 400m (Tena) to 3500m (Papallacta) in the vicinity of the Yanayacu Biological Station and Center for Creative Studies (YBS: S 00° 35.9' W 77° 53.4': 2100 m), 5km west of Cosanga, Napo province of eastern Ecuador.  


Voucher locations & numbers:

@ American Museum of Natural History : 31188, 32365, 36190
@ University of Nevada Reno (UNR): n.a.


Adult identification status:


Compared with female Holotype No.30404 U.S.N.M.; Amastus thermidora Dognin type. Holotype Amastus thermidora Dognin by A. Watson, 1967. Genitalia slide AW544.
Specimens dissected by S. Rab Green:
Reared female #36190 located @ , genitalia slide SRG #137
Collected (YY) male located @ , genitalia slide SRG #104


Original description of adult:

Dognin, P. 1913. Hétérocères nouveaux de l'Amérique du Sud. Mémoires de la Société Entomologique de Belgique 22: 4.


Type locality:

Ecuador: "Environs de Loja" 1892. Dognin Collection.


Known distribution range: