HETEROCERA. 



233 



(Swezey and Wilder) ; 8 $?, 18.ii., 31.iv., 7, 30.V.1924, vi.1925 ; Malololelei, 

 2(3$, 2 $?, 22.iii., 14. vi., 6.vii., 18.viii.1924. 



Tutuila : Leone Ed., 1 $, 20.iii.1926 (Judd). 



Manua : Ofu, 2 27. ii., 2.iii.l926 (Judd) ; Tau, 1 $, 27. ix. 1923 (Swezey). 



[Hydrillodes gravatalis Walker] (Plate XII, fig. 7). 

 Bocana gravatalis Walker, List Lep. Ins. B. M., xvi, p. 175, 1858. 



Hydrillodes? gravatalis Walker, Rebel, Denkschr. K. Akad. Wiss. Wien, Math.-Natuno. KL, 

 lxxxv, p. 428, 1910. 



Hydrillodes gravatalis Walker, Rebel, 2 Beiheft Jahrb. Hamb. Wiss. Anstalt, xxxii, p. 145, 1915. 



Upolu : Malifa, 2 6 6.vi.-6.viii.l905 (Rechinger). 



It does not seem to me likely that the specimens recorded by Rebel are really 

 H. gravatalis Walker, and I am inclined to think they are Hydrillodes surata 

 Meyrick. 



93. Hydrillodes sigma, sp. n. (Plate X, figs. 2, 4, 6, 8). 



<£. Antenna bone brown. The three segments of the palpus so modified 

 that they form a curious figure resembling the Greek letter S ; palpus ochraceous 

 buff mixed with bone brown, ochraceous buff inwardly. Thorax bone brown, 

 ventrally ochraceous buff. Abdomen bone brown, ventrally streaked with 

 avellaneous. Foreleg heavily clothed with bone brown and warm buff hair- 

 scales ; mid leg bone brown, tibia and tarsal segments distally tipped with warm 

 bufi ; hind leg warm buff shaded with bone brown. Forewing bone brown with 

 the area between the antemedial and postmedial fasciae fawn coloured ; a 

 prominent fuscous black discocellular lunule, with bone brown shading below it 

 to inner margin ; fuscous black dots at vein ends. Hindwing fuscous, with 

 traces of a discocellular lunule and a slightly bowed postmedial fascia ; fringe 

 drab. Underside ; forewing drab shaded with fuscous ; hindwing cartridge 

 buff with a prominent fuscous black discocellular lunule and roughly parallel 

 dentate fuscous black postmedial and subterminal fasciae. 



Near the base of the hindwing arises a broad thin flap apparently extending 

 over the tympanal orifice. 



Expanse : 30-32 mm. 



Holotype $, Upolu : Malololelei, 5.vii.l924. 



in (4) 



5 



