MACROLEPIDOPTERA 165 



(i) Hydriomena aphoristis, sp. nov. 



i- 23—25 mm. Head, thorax, and abdomen dark fuscous, margins of abdominal 

 segments sometimes finely whitish. Forewings triangular, costa posteriorly arched, 

 termen obliquely rounded, waved ; dark fuscous ; a whitish-ochreous dot on costa at 4- - 

 median band limited by fine irregular whitish striae, forming stronger whitish-ochreous 

 marks on costa, anterior nearly preceded and posterior nearly followed by very obscure 

 yellow-ochreous striae ; subterminal line fine, irregular, whitish, sometimes partially 

 obsolete, forming a stronger mark on costa. Hindwings with termen waved; dark 

 fuscous; traces of a fine whitish subterminal line. (Plate IV. fig. 22.) 



2 specimens, Kilauea, Hawaii, in July and September. 



Xanthorhoe Hub. 



Face with conical tuft of scales. Antennae in ,? bipectinated, apex simple. Palpi 

 rough-scaled. Forewings: areole double. Hindwings: 8 anastomosing with cell to 

 beyond middle. 



1. Forewings orange {i) ioxantha. 



,, not orange 2. 



2. Hindwings with termen dentate [4) caustoscia. 



„ ,, hardly waved 3. 



3. Forewings with dark fuscous or blackish striae (2) insularis. 



„ ferruginous-ochreous striae (j) leucoxyla. 



(i) Xanthorhoe ioxantha, sp. nov. 



?. 30 mm. Head and thorax bright orange. Abdomen orange, segmental 

 margins purplish. Forewings rather elongate-triangular, apex somewhat produced, 

 termen oblique, slightly rounded, faintly sinuate beneath apex ; bright orange ; basal 

 area ferruginous-mixed, with an angulated stria of blackish irroration at \ ; edges of 

 median band formed by fasciae of two or three subconfluent blackish striae suffused 

 with ferruginous, two interior ferruginous striae meeting near costa, posterior edge 

 dentate, with two stronger projections below middle ; a small round blackish discal 

 spot ; a ferruginous suffusion towards termen except near costa, enclosing a terminal 

 series of undefined subconfluent blackish-grey terminal spots. Hindwings elongate, 

 termen strongly rounded ; yellow-whitish, dorsal half obscurely yellow-suffused ; a black 

 discal dot; a dark grey postmedian transverse shade, thickest dorsally, angulated 

 in middle ; a dark grey terminal suffusion, towards dorsum anteriorly suffused with 

 ferruginous. (Plate IV. fig. 23.) 



I specimen, Kaholuamano, Kauai, at 4000 feet, in April. 



22 — 2 



