This is a soon-to-molt (note underlying next head capsule appearing as a swollen "neck")
Melanitis caterpillar, one of the so-called Evening Browns (Nymphalidae, Satyrinae). Of the four Javanese species, this can only be
M. leda or
M. phedima most likely the latter, based upon my rearing experience of both larvae from elsewhere in SE Asia [comment by Keith Wolfe].
Melanitis phedima ? or
Melanitis leda ??Genus:
Melanitis FABRICIUS, 1807Tribus: Melanitini (Evening Browns)Subfamily: Satyrinae (satyrids or Browns, Augenfalter)[det. Keith Wolfe, 2011, based on this photo]Family: Nymphalidae (brush-footed butterflies or four-footed butterflies, Edelfalter)Superfamily: Papilionoidea(unranked): RhopaloceraSuborder: GlossataOrder: Lepidoptera (butterflies & moth, Schmettlerlinge & Nachtfalter)Class: Insecta (insects, Insekten)more info:
tolweb.org/Melanitis/70746and:
en.wikipedia.org/wiki/Melanitis_phedimaIndonesia, W-Java, Depok: vic. Cinangka, ca. 50m asl. (a big garden close to a creek), 15.02.2011_______________________________________________MP-65mm 2.8 (Canon) 1x, 1/250s, f11, ISO 100, 0EV, ring-flash, hand-held(IMG_9908)