Miscellaneous Genera I
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Ischyja marapok sp. n.
41-44mm, possible 43-45mm. This and the next two species share features of forewing facies: the brown has a strong purplish tint; the oblique basal border to the broad marginal zone is approximately straight and clearly defined; the stigmata are set mostly within a black longitudinal area within the cell, and have pale edging; the reniform is kidney-shaped but not particularly oblique as in inferna and mantioides; there is a dumbell-shaped black streak more centrally that contains whitish marks antemedially and postmedially indicating the position of the medial loop from the dorsum. This species resembles manlia in having the blue on the hindwing upperside relatively narrow, and with similarly narrow but entire blue fasciae on the underside; that on the forewing is usually more distinctly stepped between the broad and narrow sections. Possible females are similar to those of hemiphaea Hampson but have the marginal area of the facies more irregularly blotched with mauve, lacking the distinctly ‘two-tone’ apical zone of hemiphaea. These females are not included in the type series. The male genitalia have the valve apex smaller than in manlia, more tapering, with a slightly weaker angle on the ventral margin subapically. The aedeagus and vesica are significantly smaller than in manlia.

Ischyja marapok
Ischyja marapok

Holotype . BRUNEI: 30-60m, Labi, Lowland forest and secondary veg., 5.11.78 (Lt. Col. M.G. Allen), BM noctuid slide 18356.

Paratypes: 5 Mt Marapok, Dent Province, Brit. N. BORNEO; 1 (slide 9715) Sandakan [SABAH], 91-115.

Geographical range. Sundaland, Philippines, Andamans, Thailand (VK), Indian Subregion.

Habitat preference. The more precise records are from lowland localities, though two of the possible females were from 1930m and 2600m on G. Kinabalu, and the other three from lowland forest.

Biology. A female Ischyja, probably marapok, or possibly inferna (see above), was reared from a larva in Peninsular Malaysia (H.S. Barlow, pers. comm.). When found, it was reddish with a black head capsule. The abdominal segments have fine setae dorsally set on chalazae. T1 is slightly swollen, lighter brown, and there is a lighter reddish brown patch between each of the thoracic segments. These lighter areas become more prominent and creamy brown as the larva grows. Segments A1-3 have paired brown tubercles. The whole body is tinged bluish grey by a pattern of reticulation.

At rest, the larva is humped over A1 to A3 or adopts a curled position. It spins a light web of silk amongst the flowers on which it feeds. Pupation was in a light cocoon of detached flower petals and took five days. The pupa was covered with a bloom of grey-blue powder. The adult emerged two weeks later.

The host plant was
Bauhinia (Leguminosae).

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