View Image Gallery of Family Limacodidae

Darna (Orthocraspeda) trima ajavana ssp. n.  
Orthocraspeda trima Moore, in Horsfield & Moore, 1859: 416.
Darna trima Moore; Hering 1931: 719.

Darna trima ajavana

This subspecies is externally identical to typical trima but differs in characters of the genitalia. In the male the long, slender processes of the uncus are set apart rather than being adjacent. The processes from the valve costa are relatively longer, the smaller one flexed, apically rounded, rather than straight and more acute, and the larger one with the most distal angle sharper so the apical portion is directed ventrally rather than towards the apex of the valve. In the female the bursa and ductus are broader, the former with a scobinate signum absent in the typical race, and the pairs of lobes on the lamella vaginalis are much broader, and distinctively crinkled. 

Darna trima ajavana on oil palm in Peninsular Malaysia (M.J.W. Cock).

Holotype SARAWAK: Kuching, 1 .iv.1962 (C.R. Wallace) BM limacodid slide 328.

Paratypes. l 6105, SARAWAK, BM limacodid slide 816; l, 3 SARAWAK (C.R. Wallace).

The subspecies also occurs in Sumatra, Singapore and Peninsular Malaysia.

Geographical range. Borneo, Peninsular Malaysia, Sumatra; Java.

Habitat preference. Most material to hand has been from agricultural areas though specimens have been taken at light in dry heath forest and hill dipterocarp forest in Brunei.

Biology. Wood (1968) has illustrated the larva of this subspecies and that of the typical subspecies was described by Horsfield & Moore (1859), Piepers & Snellen (1900) and Kalshoven (1981). It is possible that the green on the flanks of ajavana may be more yellow and less extensive than in the Javan race. It is present in the Philippines species but furva from Hong Kong (M.J. Bascombe, photo) has the flank patches white. The larva is illustrated on Plate 9.

The mature larva is relatively elongate, swollen more over the anterior half. The dorsolateral scoli are small, the laterals increasing from front to back both in their own length and in the length of their spines. The upper surface is medium chocolate brown, dorsally translucent, with paler thin subdorsal lines which are flanked by pairs of dark spots along their length.

An elongate triangular zone along the flanks is bright green edged yellowish then white along its dorsal margin; the brown dorsal zone is darkened where it meets the white edging.

The species is a pest of oil palm (Elaeis), coconut (Cocos), and feeds on other palms, banana (Musa), Coffea (Rubiaceae) Psidium, Eugenia (Myrtaceae), Imperata (Gramineae), Theobroma (Sterculiaceae), tea (Camellia), Citrus (Rutaceae) and many other plants.

<<Back >>Forward <<Return to Contents page

Copyright Southdene Sdn. Bhd. All rights reserved.