Australian Lepidoptera. 269 



Genus 19. Diploctena, nov. 

 [SiTrXoKTcros, with twofold comb ; in allusion to the 3' antennae]. 



Face with projecting scales. Palpi moderate, porrected, I'ough 

 scaled. Antennae in 3' bipectinated, with two pairs of line 

 ])ectinations on each segment ; extreme apex simple. Thorax 

 not hairy beneath. Posterior tibiae with all spurs present. Fore 

 wings with areole double. Hind wings with vein 5 approximated 

 at base to 6, vein 8 anastomosing with cell from near base to 

 beyond middle. 



An endemic development from Xanthorhoe, differing in the 3 

 having two pairs of pectinations to each antennal segment. The 

 species are of lai-ge size with rather elongate fore wings. 



Type D. argocyma, n. sp. 



1. Fore wings with median band, limited posteriorly 



by a white fascia ------ argocyma 



Fore wings without white fascia . - - - nephodes 



110. Diploctena argocyma, n. sp. 

 [dpyvKuyitos, white-waved]. 

 3, 36 mm. Head, palpi and thorax fuscous mixed with 

 whitish ; palpi 1^. Antennae pale grey ; in c? with two pairs of 

 pectinations on each segment, a shorter proximal pair (2) and a 

 longer distal pair (3), the pectinations being closely approximated 

 at the divisions between the segments. Abdomen whitish, 

 irrorated with fuscous ; with pairs' of dark dots on dorsum 

 of tiiird and fourth segments. Legs whitish, irrorated with 

 fuscous; anterior pair mostly fuscous; posterior pair mostly 

 whitish. b'ore wings rather elongate, triangular ; costa, 

 slightly arched ; termen slightly bowed, oblique ; fuscous 

 mixed with whitish ; a darker basal area, outwardly convex ; 

 median band darker, containing a median discal dot ; anterior 

 edge bounded ))y a fine outwardly curved whitish line, 

 from ^ costa to j dorsum ; posterior edge from j costa to |^ 

 dorsum, with a small double-toothed median projection ; 

 immediately followed by a wavy white fascia, bisected by a tine 

 fuscous line ; a mucli waved fine white suliterminal line ; cilia 

 whitish mixed with fuscous (imperfect). Hind wings with 



