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Hydrillodes eucaula Prout
     Hydrillodes eucaula Prout, 1928, Sarawak Mus. J., 3: 489.


Hydrillodes eucaula
Figure 177
Figure 196

The male forewing blister is very reduced in this species, not much more than a thickening of the costa in the same position. The labial palps are obtusely angled at this junction of the second and third segments, the latter rising obliquely, tapering, more or less equal in length to the former. Both sexes have wings a relatively uniform dark greyish brown, the forewing with the discal spot in a relatively more basal position than in other uniform grey species. The male genitalia have the valve bifid, the processes slender, tapering, the distal one slightly sinuous, about twice as long as the ventral one, which is more strongly curved and more setose. The aedeagus has a single rather delicate cornutus at the base of the vesica. The ventral margin of the tegumen is gently convex and finely serrate. The female genitalia (slide 20139) have the ductus very broad; the ostium lacks slender processes. The area of the signa in the corpus bursae is lightly sclerotised.

Geographical range. Borneo.

Habitat preference. This is a rare montane species, recorded between 900m (two males) and 1780-90m (six females) on G. Mulu. It was recorded in the original description from G. Poeh, G. Murud and G. Penrissen.

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