Mr. E,. Eosenstock on Australian Lepidoptera. 421 



in the greatly elongated and slender clielipedes ; the eyes also 

 are smaller than in either of these species. The carapace, 

 chelipedes, and ambulatory limbs are everywhere smooth and 

 glabrous. 



Length of body (of a ? with ova) 20 millim. ; length of 

 chelipedes 50 millim. 



Loc. Station 164 [off Port Jackson], 410 fathoms. 



Diptychus tridentafuSj n. sp. 



Rostrum hollowed out superiorly, the apex tridentate. 

 Lateral borders of the carapace armed with small spines ; 

 a few minute denticles on the subhepatic region. The 

 terminal joint of the peduncle of the external antenna pro- 

 longed into a spine. Chelipedes and ambulatory limbs 

 wanting in the only specimen. 



Length of body (of a ? with ova) 12 millim. 



Loc. Probably from the East-Indian archipelago. It is 

 labelled " Amboyna, 15 fms.," but, judging from the known 

 vertical distribution of the genus, this is evidently a mistake. 



XL. — Notes on Australian Lepidoptera^ loith Descriptions of 

 new Species. By Rudolph Rosenstock, B.A. 



[Plate XI.] 



[Concluded from p. -385.] 



Notodontidse. 



Nadiasa, Walk. 



(169.) Nadiasa parvigutta, Walk. 

 Nadiasa parvtgutta, Walk. I. c. v. p. 1016. 



DiSCOPHLEBIA, Feld. 



(195.) Discophlehia catocalina^ Feld. 

 Diacoplilebia catocalma, Feld. Novara Het, pi. xcvi. fig. 8. 



(419.) DiscoiMebia Lucasii % , n. sp. (PI. XL fig. 4.) 



Head cinereous grey^ with a transverse black line in front 

 of the antennee ; thorax greyish, anterior third tawny brown, 

 bordered by chocolate-brown in front and by a brownish- 



