another at end of fold, cilia brownish-ochreons ; hindwings pale brownish- 

 ochreous, darker at apex, cilia ochreous. Male with a whitish-ochreous 

 hair-pencil on upper side in a fold along vein eight. Fore and median 

 legs ochreous-brown. paler at apex of tibia and tarsal segments : hind legs 

 ochreous. tibiae rough-haired : abdomen ochreous. Forewings up-turned 

 at apex as in ErciDictis. 18-20 mm. with wings spread. 



This moth is very abundant on the windward side of Hawaii. 

 It is not included in the Fauna Hawaiiensis. which would indi- 

 cate that it was very rare when Dr. Perkins was collecting and 

 has since become numerous, or else that it is a recent intro- 

 duction which has now become very numierous. It does not an- 

 swer to any description in literature available, hence I have de- 

 scribed it as new. 



The larvae are often numerous in dead cane, especially those 

 which are rotting on account of having been badly bored 1iy the 

 cane borer {Sphcuopliorus obsciinis) \ and shoots which have 

 been killed b\- "iliau," or have died from being smothered, or 

 any other cause. I have not known of their causing the death of 

 the cane, but their appearance comes after the beginning of de- 

 composition. They may sometimes eat the lower eyes of cane 

 where there is a lot of wet trash at base of cane. They prefer 

 wet situations, and for this reason they have not bee'.i observed in 

 the sugar plantations of Oahu. They occur on this island, how- 

 ever, as I have collected the moths at W'ahiawa, and found the 

 larvae in rotten logs. On Hawaii, I have found the larvae in the 

 stipes of dead fronds of tree ferns ; and the moths came numer- 

 ously to lights, when I staid over night once at Waimea. 



The full-grown larva (Plate HI, Fig. 5) is about 20 mm. long; 

 of a dirty wh.itish color: head and cervical shield blackish-brown, 

 large blackish-brown cliitinized plates enclosing tubercles of seg- 

 mtents 3 and 4: tubercles of other segments fuscous with black 

 center at base of hair except those of iiib series; ttibcrcle ii 

 (lirectlv behind i so that they form two straight longitudinal 

 lines dow'n the back; iiia and iiib wide apart, iiib just over 

 spiracle, iiia farther forward: iv just behind spiracle and con- 

 tinguous to it; v below iiia; hairs dark brown: spiracles black: 

 surface of body covered with minute l)lack pubescence. 



The cocoon is like O. aiirisqitanwsa. The pupa is (|uite simi- 

 lar, but a little larger and does not have the two con'cal projec- 

 tions ventrallv on the cremaster. 



