TRIBE NYGMIINI n.
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Sphrageidus virguncula Walker comb. n.  
   
Euproctis virguncula Walker, 1855, List Specimens lepid. Insects Colln Br. Mus., 4: 836.
   
Euproctis marginalis Walker, 1856, Ibid. 7:1731.
   
Euproctis virguncula javanica Strand, 1915, Gross-Schmett. Erde, 10: 333.


Sphrageidus virguncula


Diagnosis.
The combination of unmarked white wings and a yellow apical tuft to the abdomen is diagnostic. The anterior edge of the male forewing and sometimes of the hindwing is usually suffused with black on the underside.

Geographical range. Indian Subregion, Burma, Thailand, Sundaland.

Habitat preference. A single Bornean specimen (not retained) was noted as reared from Anacardium (see below; unpublished IIE records) The host-plant list includes many field crops, indicating the species is a pest and occurs in open and disturbed habitats.

Biology. The larva of javanica was illustrated in Horsfield & Moore (1859 [1860]). It is reddish brown with paired longitudinal yellow bars dorsally on each segment except A1 and A2. The head is black with an inverted white V, and the prothorax has a red collar. The larva of the generic type species has a hump with the dorsal verrucae on A1 (Carter & Hargreaves, 1986).

The host-plants recorded (Horsfield & Moore, 1859 [1860]; Pholboon, 1965; Zhang, 1994; unpublished IIE records) include: Anacardium (Anacardiaceae); Brassica (Cruciferae); Dioscorea (Dioscoreaceae); Ricinus (Euphorbiaceae); Cynodon, Oryza, Pennisetum, Sorghum, Triticum, Zea (Gramineae); Erythrina, Medicago, Phaseolus, Trifolium, Vigna (Leguminosae); Hibiscus (Malvaceae); Nelumbo (Nelumbonaceae); Ziziphus (Rhamnaceae); Camellia (Theaceae).

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