194 



with vein 5 absent, 6 and 7 approximated or coincident, 8 

 coincident with cell beyond middle. 



Type, nigresctn^, Dbld. 



Differs from the other Australian genera by the absence 

 of vein 5 of forewings. 



1. Ant^iinse blackish 2 nigrcscens 



2. ,, dark orange 3 Huehneri 



3. Antennal pectinations 10 4 lAUodada 



4. „ „ 6 1 



2. H. NIGRESCENS, Dbld. 

 Thijridopteryx nigrescens, Dbld., Eyre Exped. Aus. i., p. 

 437, t. o, fig. i., 1845. Oiketicus Ilerrichii, Westw., P.Z.S., p. 

 232, t. 37, fig. 3, 1854; Macal. Proc. N.H. Sec, Dublin v., p. 

 132, fig. i., 1867. 



G , 26 mm. Head, thorax, and abdomen black : face and 

 palpi white ; thorax sometimes with a posterior dull ochreous 

 spot. Antennae dark fuscous, pectinations fuscous, at greatest 

 length 6. Legs ochreous-reddish, hairs of tibise black. Fore- 

 wings elongate-triangular, costa straight, apex rounded, ter- 

 men rounded oblique ; hyaline-iridescent, veins outlined with 

 ochreous-reddish ; a broad ochreous-reddish costal streak, from 

 base of costa to end of cell, caused by thickening of veins; 

 base of wing blackish, esiDecially along dorsum ; cilia ochreous- 

 fuscous. Hindwings rather small, apex rounded, tolerably 

 prominent, termen rounded, continuous with ajoex; colour, 

 veins, and cilia as in forewings : dorsal third of wing thickly 

 irrorated with minute scales, forming a patch throughout. 



Case. — 30-38 mm. in length, 30 mm. in circumference at 

 greatest breadth ; greyish-ochreous, minutely spotted with 

 blackish ; cylindrical, moderately smooth, not ornamented with 

 leaves or twigs, tapering at both ends, lower end more elon- 

 gate and narrow. Surface marked with seven longitudinal 

 ridges, by their projections forming concavities between the 

 ridges, which gives a transverse section the appearance of a 

 heptagon with concave sides. The case is fixed by its upper 

 end to the food-plant by a strong, short, thick appendage, 

 which is sometimes looped around the twig to which it is 

 attached. 



The case is not unlike a large dried seed capsule in gene- 

 ral appearance 



Larva. — The larvae are fuscous, mixed with blackish, the 

 head and anterior segments becoming pale fuscous, and the 

 second thoracic segment is irrorated with fuscous. Feeds on 

 IlJyral//2jfy!<, sp. 



This is not a common species. 



Sydney, New South Wales; Adelaide, South Australia; 

 and Gisborne, Victoria. Five specimens; in February and 

 March. 



