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Publ. 28. X. W20. 
DIROE; DICERATUCHA. By L. B. Prout. 
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1. Subfamily: Oenochrominae. 
A rather small subfamily, having its head-quarters in the Indo-Australian Region. As already poin¬ 
ted out in Vol. 4 (p. 2), it is doubtful whether the outliers in other regions have much phylogenetic affinity 
with it. Build robust or moderate, in a few genera (as Eumelca ) very slender. Eye naked. Antenna in $ usually 
pectinate, the pectinations often uniseriate. Wings in both sexes fully developed in all the Indo-Australian 
forms. Forewing usually with all veins present, „areole“ usually wanting. Both wings with second radial gene¬ 
rally from or before middle of discocellulars, first median not stalked (except in Thaumatographe and in the 
hindwing of Satraparchis and a few American forms). Hindwing with all the veins present, the costal free or 
connected with the subcostal by a short bar near the base. 
The earlier stages have been but little studied. The larvae sometimes show some ancestral characters 
which have disappeared from nearly all the rest of the Geometridae. Thus those of Oenochroma vinaria, Arliodia 
lasiocamparia and some other species in the same group have retained the prolegs on the fifth abdominal segment 
in addition to the usual two pairs. 
1. Genus: I>irce Prout. 
Face and palpus clothed with long hairs. Body beneath and the femora also densely hairy. Antenna 
nearly simple. Forewing with the 1st subcostal free, 2nd and 3rd stalked, the 3 rd anastomosing with the 4 th 
and 5th. Hindwing with cell rather long, 2nd radial weak, abdominal area ample, 3rd submedian running to 
anal angle. — A mountain genus, perhaps related to the Brephinae. Only two species are known, both con¬ 
fined to Tasmania. 
D. lunaris Meyr. (1 a). The blackish forewing sprinkled with pale ferruginous scales, the lines ill-defined, lunaris. 
withish. Hindwing white in the middle, dark at base and round the margins. Common on the summit of 
Mount Wellington, Tasmania in November and December, flying strongly over rocky ground. 
D. Solaris Meyr. Much rarer than the preceding species, similar in form, but easily distinguished by Solaris. 
having the hindwing bright deep reddish-orange. Mount Wellington in November and December, with the preceding. 
2. Genus: Diceratuclia Swinh. 
Face with two bluntly conical, chitinous projections. Antenna in $ shortly ciliated. Hindtibia in 
$ with a small hair-pencil. Neuration nearly as in Dirce , 2nd subcostal of hindwing long-stalked with 1st radial. 
Only one species certainly known, bearing a superficial resemblance to the Noduiclae. 
D. xenopis Lower (la). Forewing grey-brown, irregularly irrorated with black, some rather conspi- xenopis. 
cuous white costal dashes in distal half of wing; lines sinuous, pale-edged, the postmedian curving round an 
oval or somewhat kidney-shaped discal spot. Hindwing paler, only distinctly marked on abdominal margin, sug¬ 
gesting that the forewing nearly covers the hind in the position of rest. Victoria, Australia. 
D. (?) euryscia Lower (described as Stauropus!) may belong to this genus. According to a figure in esryscia. 
the British Museum, copied from Lower’s specimen, it is similar to xenopis , but with the wings rather narrower, 
forewing still darker, hindwing whitish, with elongate cell-mark, distinct postmedian line and some dark shading 
at distal margin. New South Wales. 
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