TRIBE NYGMIINI n.
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Nygmia amplior Collenette comb. n. & stat. rev. 
   
Euproctis amplior
Collenette, 1930, Trans. ent. Soc. London, 78: 70.
   
Euproctis amplior
Collenette; Holloway, 1976: 46.
   
Euproctis catala
Swinhoe sensu Schintlmeister, 1994: 135.


Nygmia amplior

Nygmia amplior
(montane)

Nygmia amplior

Nygmia amplior
(montane)


Diagnosis.
Both sexes slightly resemble semifumosa Holloway, but the males have usually more dark grey on the hindwing, a more even scattering of black scales on the forewing, and a definite postmedial fascia. The females lack the forewing white patches of semifumosa, and there are also genitalic differences as illustrated. Males could also be confused with those of xanthomela (see Nygmia xanthomela Walker comb.rev.), where the postmedials are weaker, more diffuse, but joined by a similarly diffuse antemedial.

Taxonomic notes. Placement of this species in synonymy with catala (= xanthomela) by Schintlmeister (1994) is unjustified, as the genitalia of the type match those of xanthomela as discussed under that species. Schintlmeister noted some variation in the valve of male genitalia of amplior within Sumatra, and this is also seen in Borneo. Typical amplior is mainly montane, with reduced black on the hindwing, other material having this more extensive. A similar range of hindwing blacking and variation in the valve and aedeagus vesica is seen in Bornean material, the specimens with reduced black on the hindwing again being montane. Possibly a species complex is involved, but no consistent pointers to this were found in the specimens dissected.

Geographical range. Sumatra, Borneo.

Habitat preference. Most records are from lowland dipterocarp forest but the species also occurs in the lower montane zone at about 1000m, with one record on Bukit Pagon, Brunei, at 1670m. The form with reduced yellow on the hindwing was recorded from 1200m to 1620m on G. Kinabalu.

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